Search found 108 matches

by Jasmine Fendi 1D
Tue Mar 10, 2020 1:37 pm
Forum: Zero Order Reactions
Topic: 0 order
Replies: 8
Views: 110

0 order

What would be an applicable example of a 0 order reaction? When would that make sense?
by Jasmine Fendi 1D
Tue Mar 10, 2020 1:33 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Catalyst vs intermediate
Replies: 3
Views: 57

Re: Catalyst vs intermediate

A catalyst is first a reactant and then a product while an intermediate is first a product and then a reactant
by Jasmine Fendi 1D
Tue Mar 10, 2020 1:28 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Molecularity
Replies: 4
Views: 40

Re: Molecularity

I think we use it to describe how many things have to collide in a reaction.
by Jasmine Fendi 1D
Tue Mar 10, 2020 1:27 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Differences between Reaction Mechanisms
Replies: 1
Views: 22

Re: Differences between Reaction Mechanisms

Different mechanisms have different slow steps and therefore different rate laws.
by Jasmine Fendi 1D
Tue Mar 10, 2020 1:24 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Activation Energy
Replies: 5
Views: 84

Re: Activation Energy

I think if it is endothermic and enthalpy tells how much energy or heat input is necessary then that is analogous to activation energy.
by Jasmine Fendi 1D
Mon Mar 09, 2020 1:31 pm
Forum: General Rate Laws
Topic: integrated rate law vs general
Replies: 8
Views: 125

Re: integrated rate law vs general

I think that the general rate law gives you the rate while the integrated rate laws gives the concentration of the reactants.
by Jasmine Fendi 1D
Mon Mar 09, 2020 1:24 pm
Forum: Biological Examples
Topic: Catalysts
Replies: 6
Views: 81

Re: Catalysts

I do not think that O2 is a catalyst, but rather just part of the reaction. The intermediates are NO2 and O, while the only catalyst is NO.
by Jasmine Fendi 1D
Mon Mar 09, 2020 1:21 pm
Forum: General Science Questions
Topic: Who makes the Final
Replies: 23
Views: 383

Re: Who makes the Final

I think that Lavelle makes the entire final, based off of what my TA has said in discussion.
by Jasmine Fendi 1D
Mon Mar 09, 2020 1:18 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Steady-State Approach
Replies: 4
Views: 46

Re: Steady-State Approach

I do not think that this will be covered at all on the final. I think Lavelle said in class today that we will only use the pre-equilibrium approach.
by Jasmine Fendi 1D
Mon Mar 09, 2020 1:17 pm
Forum: *Enzyme Kinetics
Topic: Catalyst Practice
Replies: 3
Views: 64

Re: Catalyst Practice

I think what was covered in the textbook was helpful!
by Jasmine Fendi 1D
Sat Mar 07, 2020 9:41 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: linear plots
Replies: 7
Views: 133

Re: linear plots

I think we have to know the axes and what axes would make a linear plot. And probably know the general shape of each graph too.
by Jasmine Fendi 1D
Sat Mar 07, 2020 9:40 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: A in the Arrhenius Equation
Replies: 8
Views: 78

Re: A in the Arrhenius Equation

Some collisions occur with wrong orientations, so this tells how many occur in the correct orientation for the reaction to occur.
by Jasmine Fendi 1D
Sat Mar 07, 2020 9:39 pm
Forum: General Rate Laws
Topic: Elementary and overall
Replies: 2
Views: 44

Re: Elementary and overall

I think the exponent in the overall rate law is not the same as the coefficient in the equation.
by Jasmine Fendi 1D
Mon Mar 02, 2020 2:58 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: G=-nFE
Replies: 5
Views: 70

Re: G=-nFE

In this equation, n=the number of electrons transferred in the redox reaction.
by Jasmine Fendi 1D
Mon Mar 02, 2020 2:55 pm
Forum: Administrative Questions and Class Announcements
Topic: test 2
Replies: 3
Views: 77

Re: test 2

Yes! That is correct.
by Jasmine Fendi 1D
Mon Mar 02, 2020 10:44 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Notation Layout
Replies: 7
Views: 53

Re: Cell Notation Layout

Yes! I found the examples in class and discussion to be helpful about cell notation.
by Jasmine Fendi 1D
Mon Mar 02, 2020 10:42 am
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Study Advice
Replies: 73
Views: 3863

Re: Study Advice

I think that Lyndon's review sessions and office hours are good resources!
by Jasmine Fendi 1D
Mon Mar 02, 2020 10:39 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: test 2 topics
Replies: 11
Views: 83

Re: test 2 topics

Second half of outline 4 and all of outline 5! Does anyone know what the difficulty level is? Is it going to be similar to test 1?
by Jasmine Fendi 1D
Mon Mar 02, 2020 10:38 am
Forum: Administrative Questions and Class Announcements
Topic: Study guide
Replies: 7
Views: 136

Re: Study guide

I don't think there is anything official, but I do know that some ta's are creating worksheets and helpful guidelines for students.
by Jasmine Fendi 1D
Mon Mar 02, 2020 10:33 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Notation commas
Replies: 4
Views: 69

Re: Cell Notation commas

For ex, in the chemical equation
-2Fe3+ + Cu -> Cu2+ + 2Fe2+
the cell notation is
Cu(s) / Cu2+(aq) ‖ Fe3+(aq) , Fe2+(aq) / Pt(s)
the comma indicates that Fe3+ is being reduced to Fe2+
by Jasmine Fendi 1D
Sun Mar 01, 2020 7:55 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: electrodes
Replies: 5
Views: 50

Re: electrodes

I think we can use most inert metals. To be safe, I think platinum is most commonly used.
by Jasmine Fendi 1D
Sun Feb 23, 2020 12:47 am
Forum: Balancing Redox Reactions
Topic: writing redox equations
Replies: 3
Views: 43

Re: writing redox equations

I also need help on this! I think it has something to do with the wording of the problem but I am not sure.
by Jasmine Fendi 1D
Sun Feb 23, 2020 12:45 am
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: cell potential
Replies: 3
Views: 57

Re: cell potential

Yes! The max potential of a cell is the maximum potential difference between two half reactions in a galvanic cell. I think you can calculate this by manipulating different equations.
by Jasmine Fendi 1D
Sun Feb 23, 2020 12:40 am
Forum: General Science Questions
Topic: Content on Test 2
Replies: 10
Views: 121

Re: Content on Test 2

Test 2 will cover everything from "Understand why reaction free energy depends on pressure and the equilibrium constant" all the way through electrochemistry
by Jasmine Fendi 1D
Sun Feb 23, 2020 12:35 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: inert conductor
Replies: 2
Views: 34

Re: inert conductor

You need an inert conductor when there is no metal present to conduct the electrons from the anode to the cathode.
by Jasmine Fendi 1D
Sun Feb 23, 2020 12:33 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Anode vs Cathode
Replies: 6
Views: 60

Re: Anode vs Cathode

The anode of a device is the terminal where current flows in from outside. The cathode of a device is the terminal where current flows out. I think you just use these terms when you are dealing with a Galvanic cell that converts chemical energy to electric energy.
by Jasmine Fendi 1D
Tue Feb 18, 2020 2:28 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Signs for Gibbs Free Energy
Replies: 11
Views: 142

Re: Signs for Gibbs Free Energy

When the sign is negative, it means that the reaction is spontaneous. That is because the reaction would result in molecules being in their most stable state which would require less energy to maintain the bonds. As a result, the overall energy is negative because energy is being released. The same ...
by Jasmine Fendi 1D
Tue Feb 18, 2020 2:25 pm
Forum: Balancing Redox Reactions
Topic: Balancing and Adding together Half-Rxns
Replies: 6
Views: 75

Re: Balancing and Adding together Half-Rxns

I think that the electrons have to be balanced because it is part of a redox reaction where two half-reactions are coupled. That means that the same amount of electrons are transferred from one reaction to another and the electrons cannot just be free floating.
by Jasmine Fendi 1D
Tue Feb 18, 2020 2:23 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: relationship between K and temp
Replies: 2
Views: 58

Re: relationship between K and temp

I agree with the comment above! In short, an increase in temp means that you are applying more energy, so the products/reactants with the higher energy level would be favored
by Jasmine Fendi 1D
Tue Feb 18, 2020 1:49 pm
Forum: Balancing Redox Reactions
Topic: Free Electrons?
Replies: 3
Views: 46

Re: Free Electrons?

I agree with the previous comment! Reduction reactions are always paired with Oxidation reactions, thus giving the name redox reaction.
by Jasmine Fendi 1D
Tue Feb 18, 2020 1:45 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Nerves
Replies: 7
Views: 104

Re: Midterm Nerves

I also felt the same way during the midterm. However, some things that somewhat helped me were listing everything that was given and some variables not given/needed to be solved for. Then, I wrote down multiple equations that involved those variables and used PV=nRT as a gateway to find other variab...
by Jasmine Fendi 1D
Sat Feb 08, 2020 4:15 pm
Forum: Calculating Work of Expansion
Topic: Integral for work
Replies: 4
Views: 57

Re: Integral for work

I don't think you need to directly calculate the work with the integral. Just memorize the equations that are derived from the integral and know when to use each one!
by Jasmine Fendi 1D
Sat Feb 08, 2020 4:10 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: biological examples
Replies: 2
Views: 78

Re: biological examples

I am also not sure, but I do know that ATP hydrolysis is an exergonic reaction, which has a negative delta G. Also, Gibbs Free Energy is used in most biochemical reactions because they occur at constant temp and pressure
by Jasmine Fendi 1D
Sat Feb 08, 2020 4:05 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Lowest Energy Forms
Replies: 1
Views: 28

Re: Lowest Energy Forms

I am also wondering this question! For now, I think I would just memorize it just in case.
by Jasmine Fendi 1D
Sat Feb 08, 2020 4:03 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Calculating bond enthalpies
Replies: 4
Views: 36

Re: Calculating bond enthalpies

Multiply by 3 if all three bonds are being broken. It definitely will not be a big part of the test, but since we did go over it in lecture we are expected to know how to do it.
by Jasmine Fendi 1D
Sat Feb 08, 2020 4:01 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Calorimeters
Replies: 17
Views: 370

Re: Calorimeters

A bomb calorimeter stays at constant volume! Because of this, there is no work being done to the system.
by Jasmine Fendi 1D
Thu Jan 30, 2020 11:59 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Celcius and Kelvin
Replies: 11
Views: 90

Re: Celcius and Kelvin

I don't think we have to memorize it, but it would be convenient to memorize it! Also watch out for your units and use either K or C based on the units you want to cancel out.
by Jasmine Fendi 1D
Thu Jan 30, 2020 11:55 pm
Forum: Calculating Work of Expansion
Topic: ∆H and ∆U
Replies: 3
Views: 45

Re: ∆H and ∆U

Delta H is the change in enthalpy while delta U is the change in internal energy in a system. Most of the time, I think you can use them interchangeably in this class.
by Jasmine Fendi 1D
Thu Jan 30, 2020 11:49 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Isolated vs Closed [ENDORSED]
Replies: 34
Views: 738

Re: Isolated vs Closed [ENDORSED]

A closed system is a sealed system but energy can be exchanged with the surrounding. On the other hand, an isolated system is completely isolated from the environment and it cannot be affected by the surroundings. That being said, an insulated bottle is an isolated system if we assume that it is com...
by Jasmine Fendi 1D
Thu Jan 30, 2020 11:45 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 8
Views: 120

Re: Midterm

I think everything we have covered so far, including all of this week's lectures!
by Jasmine Fendi 1D
Thu Jan 30, 2020 11:43 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Enthalpies of Formation
Replies: 4
Views: 47

Re: Enthalpies of Formation

I think so, but I am also wondering this question!!
by Jasmine Fendi 1D
Wed Jan 22, 2020 11:43 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: H20 in the ICE table
Replies: 26
Views: 239

Re: H20 in the ICE table

When filling out and ICE table, only include gases and aqueous molecules. In addition to the comments above, you want to leave our solids because you cannot really condense or expand solids since they are in a fixed state
by Jasmine Fendi 1D
Wed Jan 22, 2020 11:40 pm
Forum: Phase Changes & Related Calculations
Topic: Enthalpy
Replies: 4
Views: 76

Re: Enthalpy

Enthalpy is just the measure of heat! Temperature and enthalpy are related but are different, as seen in heat curves. The x-axis is heat supplied and the y-axis is temperature
by Jasmine Fendi 1D
Wed Jan 22, 2020 11:30 pm
Forum: Administrative Questions and Class Announcements
Topic: Best Way To Study?
Replies: 13
Views: 147

Re: Best Way To Study?

In addition to doing the homework problems in the textbook, I found all of the workshop sessions very helpful :)
by Jasmine Fendi 1D
Wed Jan 22, 2020 11:29 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: suggestions
Replies: 16
Views: 154

Re: suggestions

After watching the videos that were mentioned in the previous comments, I would recommend trying to find some more practice problems to check your understanding :)
by Jasmine Fendi 1D
Wed Jan 22, 2020 11:26 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Calculating K
Replies: 15
Views: 158

Re: Calculating K

Always balance the equation! When calculating K, the incorrect coefficients will change the exponents in the equation and you would not calculate the correct equilibrium constant
by Jasmine Fendi 1D
Thu Jan 16, 2020 1:26 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Quadratic
Replies: 6
Views: 65

Re: Quadratic

Memorizing the quadratic equation would help! Also, it is good to know the shortcut with the 5% rule. if you are dealing with a weak acid and Ka is small, we can use approximation. The cut off is anything smaller than 10^-3
by Jasmine Fendi 1D
Thu Jan 16, 2020 1:21 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K units
Replies: 10
Views: 111

Re: K units

K actually measures the activity of the reaction. For this class, I think we omit the units for simplicity
by Jasmine Fendi 1D
Thu Jan 16, 2020 1:17 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Kw
Replies: 16
Views: 128

Re: Kw

They are the same thing, and Kw=Ka*Kb=10^-14
by Jasmine Fendi 1D
Thu Jan 16, 2020 1:12 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: How to make ICE box
Replies: 17
Views: 311

Re: How to make ICE box

To add onto the comments above, make sure you go back to the problem to see what you need to solve for. After you find x, you may need to multiply it by 2 if the concentration you are looking for is 2x
by Jasmine Fendi 1D
Thu Jan 16, 2020 1:10 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Units in ICE Table
Replies: 8
Views: 90

Re: Units in ICE Table

I think that you can use either molarity or moles. It would definitely be easier to use molarity since that can be easily used in Kc. If you use moles, you would have to convert the values at the end to molarity by dividing by the volume(L)
by Jasmine Fendi 1D
Thu Jan 09, 2020 10:42 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Difference between -> and <->
Replies: 4
Views: 53

Re: Difference between -> and <->

<-> means that the reaction is at equilibrium so there is a forward reaction and reverse reaction
by Jasmine Fendi 1D
Thu Jan 09, 2020 10:40 pm
Forum: Ideal Gases
Topic: Adding reactions
Replies: 4
Views: 51

Re: Adding reactions

I think that is just part of the formula, but I was also wondering the same thing.
by Jasmine Fendi 1D
Thu Jan 09, 2020 3:16 pm
Forum: Ideal Gases
Topic: Ideal Gases
Replies: 3
Views: 34

Re: Ideal Gases

I am also not sure. From looking at the outline, it looks like we just need to know how to use the equation.
by Jasmine Fendi 1D
Thu Jan 09, 2020 3:11 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Pressure
Replies: 4
Views: 55

Re: Pressure

Unlike temperature, the change in pressure does not change the equilibrium constant.
by Jasmine Fendi 1D
Thu Jan 09, 2020 3:08 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Hydrogen Bond
Replies: 2
Views: 324

Re: Hydrogen Bond

I don't think that there would be a hydrogen bond between water and oxygen gas because the two oxygen atoms are equally electronegative.
by Jasmine Fendi 1D
Tue Dec 03, 2019 11:28 pm
Forum: Naming
Topic: Memorization
Replies: 6
Views: 79

Re: Memorization

I think we need to memorize it and also we should memorize the ligands list that Lavelle sent out in an email.
by Jasmine Fendi 1D
Tue Dec 03, 2019 11:25 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: sigma and pi bonds
Replies: 2
Views: 103

Re: sigma and pi bonds

Yes, I think that is all we need to know too. Also make sure that you know how to label each bond and know which hybrid/normal orbitals are used.
by Jasmine Fendi 1D
Tue Dec 03, 2019 8:37 am
Forum: Ionic & Covalent Bonds
Topic: bond lengths
Replies: 4
Views: 217

Re: bond lengths

I also do not think that we need to memorize the exact bond lengths. We should at least know the relative bond lengths between single, double and triple bonds and the 1.5 bonds in resonance structures
by Jasmine Fendi 1D
Tue Dec 03, 2019 8:35 am
Forum: Student Social/Study Group
Topic: Practice Final
Replies: 17
Views: 593

Re: Practice Final

I do not think there is a practice final, but there are a lot of past exam questions that will be helpful. Also, the 7:30 review session will be going over most things that were covered after the midterm so it would be helpful to go to other review sessions to go over the topics that were covered at...
by Jasmine Fendi 1D
Tue Dec 03, 2019 8:33 am
Forum: Bronsted Acids & Bases
Topic: Defining brosted and lewis
Replies: 5
Views: 73

Re: Defining brosted and lewis

Adding to the comments above,
bronsted base: proton acceptor
bronsted acid: proton donor
lewis base: electron pair donor
lewis acid: electron pair acceptor
I would identify them by focusing on what is being transferred or changed in the reaction.
by Jasmine Fendi 1D
Tue Dec 03, 2019 8:27 am
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Homework 6B.5
Replies: 1
Views: 52

Re: Homework 6B.5

The first step to solving this problem like this in general is finding the moles of hydrogen which is used through stoichiometry. After finding the moles of hydrogen, you can find the concentration of hydrogen, aka H30+, by using the formula molarity=moles/liter. [HNO3]=[H3O+] is just saying that th...
by Jasmine Fendi 1D
Tue Dec 03, 2019 8:16 am
Forum: Conjugate Acids & Bases
Topic: 6A.1
Replies: 6
Views: 148

Re: 6A.1

You add a hydrogen to the formula and add a +1 to the overall charge of the acid
by Jasmine Fendi 1D
Tue Nov 26, 2019 11:57 am
Forum: Coordinate Covalent Bonds
Topic: identification
Replies: 1
Views: 100

Re: identification

One way is to look for the neutral ligands that are bonded to a central metal atom!
by Jasmine Fendi 1D
Tue Nov 26, 2019 11:56 am
Forum: SI Units, Unit Conversions
Topic: midterm/final
Replies: 18
Views: 626

Re: midterm/final

I also think it would be calculations and concepts!
by Jasmine Fendi 1D
Mon Nov 25, 2019 9:44 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: complexes
Replies: 3
Views: 74

Re: complexes

Yes! I think we should memorize the chart that Lavelle sent out in an email a few days ago
by Jasmine Fendi 1D
Mon Nov 25, 2019 9:39 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: OH2 vs H2O
Replies: 4
Views: 83

Re: OH2 vs H2O

I don't think you would get marked down, but just make sure that you make it clear that you know that the O is the one being bonded to the central atom!
by Jasmine Fendi 1D
Mon Nov 25, 2019 9:38 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Transition Metals
Replies: 4
Views: 97

Re: Transition Metals

I think it is only transition metals, but I am not sure as well :0
by Jasmine Fendi 1D
Sun Nov 24, 2019 12:25 am
Forum: General Science Questions
Topic: Sig Figs
Replies: 7
Views: 131

Re: Sig Figs

Always make sure you have the right sig figs to be safe :)
by Jasmine Fendi 1D
Sun Nov 24, 2019 12:24 am
Forum: Naming
Topic: Greek Prefixes
Replies: 2
Views: 43

Re: Greek Prefixes

Adding on to the comment above, you use it so that it is not awkward saying didimethyl and it adds clarity
by Jasmine Fendi 1D
Tue Nov 19, 2019 10:18 am
Forum: Ionic & Covalent Bonds
Topic: bond lengths
Replies: 4
Views: 217

Re: bond lengths

I don't think we need to memorize bond lengths! Maybe just know that the order of increasing bond lengths is triple<double<single bonds
by Jasmine Fendi 1D
Tue Nov 19, 2019 10:15 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Atomic Size & LDF's
Replies: 2
Views: 54

Re: Atomic Size & LDF's

To add on to the previous comment, more electrons result in greater electron repulsion, which leads to greater polarizability and greater london dispersion forces
by Jasmine Fendi 1D
Thu Nov 14, 2019 11:55 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 2E.3
Replies: 3
Views: 59

Re: 2E.3

To add on to the comment above, the name of the shape of the molecule only depends on the number of atoms attached to the central atoms and the number of lone pairs on the central atom. Single, double and triple bonds are considered the same as "one unit" and lone pairs on outside atoms do...
by Jasmine Fendi 1D
Thu Nov 14, 2019 11:52 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: "Less than" Degrees (HW)
Replies: 1
Views: 32

Re: "Less than" Degrees (HW)

I think this is because in order for the molecule to be in the most "stable" state, the lone pairs and attached atoms need to be as far apart as possible, and the lone pairs cause the angles to decrease.
by Jasmine Fendi 1D
Tue Nov 12, 2019 10:26 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Homework for Week 7
Replies: 5
Views: 65

Re: Homework for Week 7

As I mentioned in another post, I think we can still do some homework problems from the chemical bonds unit because as of now we have not really learned anything new and it is still good to review material for the final! However it is good to look ahead to see what we will be covering next
by Jasmine Fendi 1D
Tue Nov 12, 2019 10:23 am
Forum: Ionic & Covalent Bonds
Topic: Homework for week 7
Replies: 5
Views: 96

Re: Homework for week 7

I think so! As of now we haven't really learned anything new and it is still good to review past material for the final
by Jasmine Fendi 1D
Tue Nov 12, 2019 10:20 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Forces
Replies: 3
Views: 45

Re: Forces

I think this is because of electron repulsion!
by Jasmine Fendi 1D
Thu Nov 07, 2019 5:24 pm
Forum: Formal Charge and Oxidation Numbers
Topic: central atom
Replies: 21
Views: 249

Re: central atom

yes! I think that it is better to have the charge on the most electronegative atom, such as oxygen
by Jasmine Fendi 1D
Thu Nov 07, 2019 11:52 am
Forum: Trends in The Periodic Table
Topic: ionic radii
Replies: 4
Views: 115

Re: ionic radii

In addition to the comments above, the atomic radii decreases as you move towards the right of a period. This is because as you move right, the added electrons are added to the same n level but the number of protons in the nucleus increases. The protons have a much greater effect than the added elec...
by Jasmine Fendi 1D
Thu Nov 07, 2019 11:48 am
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Comparing forces of attraction
Replies: 4
Views: 51

Re: Comparing forces of attraction

Hydrogen bonds are strong intermolecular forces created when a hydrogen atom bonded to an electronegative atom approaches a nearby electronegative atom, and greater electronegativity of the hydrogen bond acceptor will lead to an increase in hydrogen-bond strength. I think it is because the charge of...
by Jasmine Fendi 1D
Thu Nov 07, 2019 11:18 am
Forum: Octet Exceptions
Topic: General principles of octet exception
Replies: 7
Views: 89

Re: General principles of octet exception

I think that everything in row 3+ can have an expanded octet, and elements such as Aluminum does not have to have an octet.
by Jasmine Fendi 1D
Thu Nov 07, 2019 11:15 am
Forum: Lewis Structures
Topic: Lewis acids and bases?
Replies: 7
Views: 76

Re: Lewis acids and bases?

I believe so! I do know that we will be going over more acids and bases towards the end of the quarter
by Jasmine Fendi 1D
Thu Oct 31, 2019 2:57 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge equation
Replies: 9
Views: 82

Re: Formal Charge equation

hello! the equation for formal charge may be confusing, so my TA told us that you do not have to memorize it. I think you can calculate it using the number of valence electrons from the periodic table and the number of shared electrons in the lewis structure
by Jasmine Fendi 1D
Thu Oct 31, 2019 2:54 pm
Forum: Lewis Structures
Topic: lewis structures
Replies: 4
Views: 51

Re: lewis structures

I think that there would be one correct answers since some lewis structure could be drawn based on different orientations. However, there are some structures that are more stable than others due to formal charge so I think that there will be partial credit if you do not draw the most stable structure.
by Jasmine Fendi 1D
Thu Oct 31, 2019 2:51 pm
Forum: Administrative Questions and Class Announcements
Topic: Posts
Replies: 3
Views: 61

Re: Posts

I believe the replies count as posts!
by Jasmine Fendi 1D
Thu Oct 31, 2019 2:50 pm
Forum: Administrative Questions and Class Announcements
Topic: DINO NUGGETS Review Session! Download Problems HERE [ENDORSED]
Replies: 52
Views: 4974

Re: DINO NUGGETS Review Session! Download Problems HERE [ENDORSED]

Do you think that the practice problems on the dino nuggets worksheet are about the same difficulty as the problems that would be on the midterm?
by Jasmine Fendi 1D
Mon Oct 28, 2019 8:37 pm
Forum: Ionic & Covalent Bonds
Topic: Midterm
Replies: 28
Views: 399

Re: Midterm

I was wondering the same question. That is what I think also but I am not sure
by Jasmine Fendi 1D
Thu Oct 24, 2019 10:34 am
Forum: Trends in The Periodic Table
Topic: Location of elements
Replies: 12
Views: 204

Re: Location of elements

I think it would be helpful, but make sure to know where all of the common elements are so they are easier to find on the periodic table!
by Jasmine Fendi 1D
Thu Oct 24, 2019 10:27 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Electron Configurations
Replies: 13
Views: 500

Re: Electron Configurations

Hi, can someone please further explain the exception for the electron configuration for 3d and 4s? especially for the elements Cr and Cu?

Thank you!
by Jasmine Fendi 1D
Thu Oct 24, 2019 10:23 am
Forum: Trends in The Periodic Table
Topic: Summary of Periodic Trends
Replies: 7
Views: 148

Re: Summary of Periodic Trends

Can someone please explain why ionization energy increases as you move from left to right on the periodic table?
by Jasmine Fendi 1D
Thu Oct 24, 2019 10:17 am
Forum: Ionic & Covalent Bonds
Topic: Properties of Metals/Nonmetals/Metalloids
Replies: 3
Views: 74

Re: Properties of Metals/Nonmetals/Metalloids

In addition to the other responds, nonmetals have high ionization energies. They are generally poor conductors of heat and electricity. Solid nonmetals are generally brittle, with little or no metallic luster, and most nonmetals have the ability to gain electrons easily
by Jasmine Fendi 1D
Thu Oct 24, 2019 10:12 am
Forum: Properties of Light
Topic: Midterm
Replies: 4
Views: 101

Re: Midterm

Yes! Dr. Lavelle mentioned it and I believe sometime soon he will let us know when the review sessions are
by Jasmine Fendi 1D
Fri Oct 18, 2019 11:41 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Best Way To Study?
Replies: 56
Views: 1180

Re: Best Way To Study?

First, I like to go through practice problems and make a list of topics I am confused about. Sometimes I also rewrite my notes from lecture and try to explain it to others since it helps to talk through it out loud.
by Jasmine Fendi 1D
Fri Oct 18, 2019 11:22 am
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8047
Views: 1413303

Re: Post All Chemistry Jokes Here

Q: What do you do with a sick chemist?
A: If you can't helium, and you can't curium, then you might as well barium.
by Jasmine Fendi 1D
Wed Oct 16, 2019 1:45 pm
Forum: Properties of Light
Topic: Constant for Speed of Light
Replies: 14
Views: 211

Re: Constant for Speed of Light

I would use 2.998*10^8 m*s-1 because it would give you a more exact answer, but maybe ask your TA!
by Jasmine Fendi 1D
Wed Oct 16, 2019 1:42 pm
Forum: Properties of Electrons
Topic: Orbitals and Lobes
Replies: 3
Views: 57

Re: Orbitals and Lobes

I think that an orbital is the probability description of where an electron can be found, and the four basic types of orbitals are designated as s, p, d, and f. To my understanding, lobes are more specific areas within the orbitals in which there is a high probability of finding an electron.
by Jasmine Fendi 1D
Wed Oct 16, 2019 1:36 pm
Forum: General Science Questions
Topic: Salt Water: Mixture or Compound?
Replies: 4
Views: 89

Re: Salt Water: Mixture or Compound?

I think salt water is a mixture because it is made up of different compounds/elements (salt and water).
by Jasmine Fendi 1D
Fri Oct 11, 2019 4:06 pm
Forum: Significant Figures
Topic: for test 1
Replies: 3
Views: 133

Re: for test 1

There might be some points marked off, but I believe there is still partial credit! And as long as you are aware of it for the next test, you should be fine
by Jasmine Fendi 1D
Fri Oct 11, 2019 3:58 pm
Forum: Student Social/Study Group
Topic: Best Sessions
Replies: 12
Views: 183

Re: Best Sessions

In addition to the sessions in covel, I recommend going over the lecture videos and trying to reexplain the lecture to someone else in your own words

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