Search found 74 matches

by Ian Morris 3C
Tue Feb 18, 2020 10:52 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: delta g vs delta g°
Replies: 2
Views: 10

delta g vs delta g°

What is the difference between Delta g vs delta g°.
thanks
by Ian Morris 3C
Tue Feb 18, 2020 10:46 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibbs Free naught
Replies: 2
Views: 10

Re: Gibbs Free naught

Q is quotient at any point in the reaction, and K is constant at equilibrium. You will always use both with this equation.
by Ian Morris 3C
Tue Feb 18, 2020 10:35 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: Spontaneous
Replies: 8
Views: 17

Spontaneous

What makes a reaction spontaneous, based on the value of Gibb's Free Energy.
by Ian Morris 3C
Tue Feb 18, 2020 10:21 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Adiabatic systems
Replies: 3
Views: 6

Adiabatic systems

So for adiabatic systems, will q ALWAYS equal 0?
by Ian Morris 3C
Tue Feb 18, 2020 10:20 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Adiabatic systems
Replies: 10
Views: 22

Adiabatic systems

So for adiabatic systems, will q ALWAYS equal 0?
by Ian Morris 3C
Tue Feb 18, 2020 10:17 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Reversible Systems
Replies: 3
Views: 8

Reversible Systems

What is the difference between reversible and irreversible systems?
by Ian Morris 3C
Mon Feb 10, 2020 11:35 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm dates
Replies: 11
Views: 32

Re: Midterm dates

everything up to first half of thermodynamics, with an emphasis on material after test 1.
by Ian Morris 3C
Mon Feb 10, 2020 1:32 am
Forum: Administrative Questions and Class Announcements
Topic: Midterm Conversion
Replies: 3
Views: 17

Midterm Conversion

will we be given the conversion rate of L*atm to J or will we have to memorize that?
by Ian Morris 3C
Mon Feb 10, 2020 1:25 am
Forum: Administrative Questions and Class Announcements
Topic: Pizza Rolls REVIEW Session DOWNLOAD HERE
Replies: 65
Views: 2232

Re: Pizza Rolls REVIEW Session DOWNLOAD HERE

Naren_Ramesh_4F wrote:Will the answer key be posted on Chemistry Community?

Yes they are usually but after the review session.
by Ian Morris 3C
Mon Jan 27, 2020 2:05 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Reaction Shifts Left or Right
Replies: 15
Views: 42

Re: Reaction Shifts Left or Right

It will shift to the left.
by Ian Morris 3C
Mon Jan 27, 2020 2:03 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: pKa to Kb
Replies: 12
Views: 42

Re: pKa to Kb

14 minus the kPa will equal the pKb. Then Kb is equal 10 to the negative pKb.
by Ian Morris 3C
Mon Jan 27, 2020 1:55 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: calculating % ionization
Replies: 4
Views: 20

Re: calculating % ionization

You divide the concentration of the acid ion but the initial concentration of the acid itself.
by Ian Morris 3C
Mon Jan 27, 2020 1:48 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: checking approximation
Replies: 4
Views: 12

Re: checking approximation

Yes, it doesn't happen often but it is best to always check.
by Ian Morris 3C
Mon Jan 27, 2020 1:38 am
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Exothermic reaction
Replies: 18
Views: 44

Re: Exothermic reaction

For reactions that are exothermic, a shift to the left means we are increasing the temperature and a shift to the right means we are decreasing the temperature
by Ian Morris 3C
Mon Jan 20, 2020 3:37 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Ice Tables
Replies: 4
Views: 16

Re: Ice Tables

Ice tables are used for partial pressures and concentrations in weak acids and bases.
by Ian Morris 3C
Mon Jan 20, 2020 3:30 am
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Adding Inert Gas
Replies: 9
Views: 28

Re: Adding Inert Gas

Diana A 2L wrote:What is considered an inert gas? Do we have to remember a list of them or is there a way to tell if a gas is inert?

An inert gas is just any noble gas.
by Ian Morris 3C
Mon Jan 20, 2020 3:26 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: q vs k
Replies: 9
Views: 15

Re: q vs k

When Q reaches K, it is at equilibrium.
by Ian Morris 3C
Mon Jan 20, 2020 2:55 am
Forum: Ideal Gases
Topic: PV=nRT
Replies: 13
Views: 52

Re: PV=nRT

In this class, we will mainly focus on the use of PV=nRT to find concentration or pressure.
by Ian Morris 3C
Sun Jan 12, 2020 9:46 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: changing conditions
Replies: 6
Views: 18

Re: changing conditions

The reaction will want to be balanced between the products and reactants, so there will be a shift to the products side.
by Ian Morris 3C
Sun Jan 12, 2020 9:25 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Using the "ICE" box
Replies: 8
Views: 57

Re: Using the "ICE" box

Only gas and aqueous are included, never liquids and solids.
by Ian Morris 3C
Sun Jan 12, 2020 8:44 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Test 1
Replies: 6
Views: 30

Re: Test 1

The first test will not be this week, but week 3.
by Ian Morris 3C
Sun Jan 12, 2020 8:42 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: memorization
Replies: 12
Views: 38

Re: memorization

You won´t need to memorize anything but you will either be given it or be expected to calculate it.
by Ian Morris 3C
Sun Jan 12, 2020 8:39 pm
Forum: Ideal Gases
Topic: Kc vs Kp
Replies: 5
Views: 16

Re: Kc vs Kp

Also, when answering, make sure each concentration is in brackets while pressure will be in parenthesis.
by Ian Morris 3C
Sat Dec 07, 2019 10:32 pm
Forum: Calculating the pH of Salt Solutions
Topic: Titrations
Replies: 6
Views: 68

Re: Titrations

So nothing with titration equations?
by Ian Morris 3C
Sat Dec 07, 2019 10:27 pm
Forum: Bronsted Acids & Bases
Topic: Hydrogen Bonding
Replies: 10
Views: 65

Re: Hydrogen Bonding

No it is not an acid base reaction.
by Ian Morris 3C
Sat Dec 07, 2019 10:25 pm
Forum: Air Pollution & Acid Rain
Topic: acid rain
Replies: 4
Views: 71

Re: acid rain

Is that all that was focused on for acid rain?
by Ian Morris 3C
Sat Dec 07, 2019 10:15 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: when to use what equation
Replies: 5
Views: 44

Re: when to use what equation

Ka and Kb is for weak acids and bases.
by Ian Morris 3C
Sat Dec 07, 2019 10:10 pm
Forum: Lewis Acids & Bases
Topic: Strong/Weak Acids and Bases
Replies: 4
Views: 78

Strong/Weak Acids and Bases

Is there a list of the most important strong/ weak acids and bases that we should memorize for the final.
by Ian Morris 3C
Mon Dec 02, 2019 12:00 am
Forum: Conjugate Acids & Bases
Topic: Definition
Replies: 7
Views: 42

Re: Definition

Conjugate base- acid loses hydrogen, conjugate acid- base gains hydrogen
by Ian Morris 3C
Sun Dec 01, 2019 11:59 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Strong and Weak Acids
Replies: 7
Views: 43

Re: Strong and Weak Acids

It is probably best to just memorize the list of strong bases and acids.
by Ian Morris 3C
Sun Dec 01, 2019 11:57 pm
Forum: Bronsted Acids & Bases
Topic: Final
Replies: 13
Views: 81

Re: Final

The final should be cumulative, with all topics of the syllabus being covered. I assume there would be a focus on the topics after the midterm.
by Ian Morris 3C
Sun Dec 01, 2019 11:39 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Bond strength and strength of acid.
Replies: 6
Views: 30

Re: Bond strength and strength of acid.

The weaker or longer the bond, the stronger the acid.
by Ian Morris 3C
Sun Dec 01, 2019 11:36 pm
Forum: Calculating the pH of Salt Solutions
Topic: calculating pH
Replies: 4
Views: 210

Re: calculating pH

For strong acids and bases, we will have to calculate the pH. However, for weak acids and bases, we will have to compare which would be relatively stronger or weaker.
by Ian Morris 3C
Sun Nov 24, 2019 10:01 pm
Forum: Amphoteric Compounds
Topic: Amphiprotic
Replies: 11
Views: 75

Re: Amphiprotic

Amphiprotic= a substance that can both accept and donate a proton (has characteristics of both an acid and a base) amphiprotic vs. amphoteric: -a substance is amphoteric when its reaction acts as an acid and as a base -amphiprotic only applies to protic compounds Does a Protic compound just mean it...
by Ian Morris 3C
Sun Nov 24, 2019 9:51 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Why HF is a weaker acid than HCl
Replies: 17
Views: 1167

Re: Why HF is a weaker acid than HCl

405021651 wrote:does a bigger radius mean a stronger acid or is it the other way around??

Yes that is correct.
by Ian Morris 3C
Sun Nov 24, 2019 9:25 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: IMF [ENDORSED]
Replies: 6
Views: 314

Re: IMF [ENDORSED]

Induced dipole is when there is a molecule that is not polar or has no dipole moment, but then it experiences a temporary dipole moment because of the dipole moment of another molecule. A dipole dipole moment is where there are two molecules that experience attraction between the partially positive...
by Ian Morris 3C
Sun Nov 24, 2019 8:52 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Bronsted acids
Replies: 5
Views: 47

Re: Bronsted acids

So would it be Bronsted Acid + Bronsted Base -> Conjugate Acid + Conjugate Base?
by Ian Morris 3C
Sun Nov 24, 2019 8:31 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: How to tell?
Replies: 11
Views: 277

Re: How to tell?

Given a chemical equation, you can determine which substance is the acid by counting the hydrogens on each substance before and after the reaction. If the number of hydrogens has decreased, that substance is an acid since acids are hydrogen ion donors. Is there any way to confirm if it is an acid o...
by Ian Morris 3C
Sun Nov 17, 2019 10:55 pm
Forum: Student Social/Study Group
Topic: What will Test 2 be on?
Replies: 8
Views: 47

Re: What will Test 2 be on?

Everything we covered since the midterm and up to the slides about pi and sigma bonds that well go over in class on Monday. Probably focus on outline 3 and 4.
by Ian Morris 3C
Sun Nov 17, 2019 10:45 pm
Forum: Student Social/Study Group
Topic: Class Grading
Replies: 36
Views: 524

Re: Class Grading

It can be curved up if the class percentage is much lower than anticipated so I wouldn't count on it. I would focus on getting at just the 250 points required for the C- is your main goal is just to pass.
by Ian Morris 3C
Sun Nov 17, 2019 10:23 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Dispersion
Replies: 5
Views: 40

Re: Dispersion

Kennedi3K wrote:Will we have to know about dispersion and induced dipole for test 2? Or is it only London forces, dipole-dipole, and hydrogen bonding?

Going over induced dipole wouldn't hurt, but I would focus on the main three of London, DD, and H bonding.
by Ian Morris 3C
Sun Nov 17, 2019 9:52 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: This Week Test
Replies: 12
Views: 69

Re: This Week Test

JasonKwon_3k wrote:Are Sigma and Pi bonds gonna be the last topic that will be on the test.


Yes, I do believe so.
by Ian Morris 3C
Sun Nov 17, 2019 9:51 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR Model
Replies: 3
Views: 23

Re: VSEPR Model

You should know the bond angles and shape names.
by Ian Morris 3C
Sun Nov 10, 2019 8:10 pm
Forum: General Science Questions
Topic: London
Replies: 4
Views: 38

Re: London

It is one of the intermolecular forces, and is the weakest.
by Ian Morris 3C
Sun Nov 10, 2019 6:22 pm
Forum: Student Social/Study Group
Topic: Midterm Average
Replies: 12
Views: 131

Midterm Average

I know he is planning on releasing the midterm grades on Wednesday, but does anyone know if will the average will be included as well?
by Ian Morris 3C
Sun Nov 10, 2019 6:17 pm
Forum: Student Social/Study Group
Topic: midterm grades
Replies: 8
Views: 77

Re: midterm grades

I am pretty sure he said that we will see our grades after the Wednesday lecture. Not sure about when or if we get back the physical midterm.
by Ian Morris 3C
Sun Nov 10, 2019 5:05 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Water molecules
Replies: 9
Views: 288

Re: Water molecules

It will use both hydrogens
by Ian Morris 3C
Sun Nov 10, 2019 4:55 pm
Forum: Hybridization
Topic: Noble Configuration vs. Full
Replies: 7
Views: 46

Re: Noble Configuration vs. Full

They will usually tell you if you need to use shorthand or the full configuration. If not, noble gas should be fine.
by Ian Morris 3C
Sun Nov 03, 2019 10:54 pm
Forum: DeBroglie Equation
Topic: When to use the DeBroglie equation?
Replies: 6
Views: 45

Re: When to use the DeBroglie equation?

Ayushi2011 wrote:Any particle with wavelike properties that has momentum. They will give us the mass and velocity.


And to have wavelike properties it just has to be over 10^'15 correct?
by Ian Morris 3C
Sun Nov 03, 2019 10:49 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: Polar v nonPolar
Replies: 4
Views: 486

Re: Polar v nonPolar

To add on to the previous reply, one needs to know an element's general electronegativity to tell whether a molecule is polar or not. The electronegativity trend is shown on the periodic table as increasing from bottom-left to top-right (with some exceptions). So if a molecule is made of atoms on o...
by Ian Morris 3C
Sun Nov 03, 2019 10:43 pm
Forum: Quantum Numbers and The H-Atom
Topic: Rules for n, l,m
Replies: 11
Views: 74

Re: Rules for n, l,m

n = energy level
l = can be numbers (n-1)
ms = can be -1/2 or + 1/2
by Ian Morris 3C
Sun Nov 03, 2019 10:24 pm
Forum: Hybridization
Topic: Pi bonds
Replies: 8
Views: 284

Re: Pi bonds

Iona Pay wrote:I found this video helpful for understanding the hybridization of pi bonds.

https://www.khanacademy.org/science/organic-chemistry/gen-chem-review/hybrid-orbitals-jay/v/pi-bonds-and-sp2-hybridized-orbitals


This video is very helpful. Thanks for sharing
by Ian Morris 3C
Sun Nov 03, 2019 10:03 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Writing e- Configurations
Replies: 15
Views: 90

Re: Writing e- Configurations

Unless stated in the problem, it won´t matter which you choose. If you are still unsure, it wouldn´t hurt to write it all out.
by Ian Morris 3C
Sun Oct 27, 2019 11:27 pm
Forum: Naming
Topic: Naming Compounds (general question)
Replies: 9
Views: 91

Re: Naming Compounds (general question)

memorization is most likely not necessary, and if it is needed, it will probably be given to us
by Ian Morris 3C
Sun Oct 27, 2019 11:25 pm
Forum: Bond Lengths & Energies
Topic: Delocalization
Replies: 3
Views: 26

Re: Delocalization

Delocalization will occur in all resonance structures.
by Ian Morris 3C
Sun Oct 27, 2019 11:11 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Expanded Valence Shells
Replies: 5
Views: 35

Re: Expanded Valence Shells

Michelle Shin 4B wrote:The elements P, S, and Cl can accommodate more than 8 valence electrons since atoms in period 3 or higher have d-orbitals that can accommodate more electrons.

Are they the only three that can do this?
by Ian Morris 3C
Sun Oct 27, 2019 11:06 pm
Forum: Ionic & Covalent Bonds
Topic: Ionization Energy Unit
Replies: 6
Views: 39

Re: Ionization Energy Unit

Units are in kJ/mol
by Ian Morris 3C
Sun Oct 27, 2019 11:02 pm
Forum: Ionic & Covalent Bonds
Topic: Resonance Structures
Replies: 5
Views: 28

Re: Resonance Structures

I wish that were the case, but I'm pretty sure you have to draw each electron as a dot unless it is being shared.
by Ian Morris 3C
Sun Oct 20, 2019 10:47 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Why is 4s before 3d?
Replies: 9
Views: 77

Re: Why is 4s before 3d?

This is because 4s has a lower energy and is easier to fill up. This will very likely be on the midterm.
by Ian Morris 3C
Sun Oct 20, 2019 10:45 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg equation [ENDORSED]
Replies: 73
Views: 1700

Re: Rydberg equation [ENDORSED]

TimVintsDis3C wrote:Are all of these equations meant to be memorized, or will they be provided on tests?


Most equations are on the reference sheet on the test. That being said it does not hurt to memorize or at least be very familiar with them.
by Ian Morris 3C
Sun Oct 20, 2019 10:43 pm
Forum: General Science Questions
Topic: Test #1
Replies: 6
Views: 50

Re: Test #1

Percent yield will always be multiplied by 100 to get the percentage.
by Ian Morris 3C
Sun Oct 20, 2019 10:40 pm
Forum: DeBroglie Equation
Topic: Deriving the DeBrogile Equation
Replies: 8
Views: 75

Re: Deriving the DeBrogile Equation

Usually it is useful to be able to derive a simpler equation like this, as the derivation can be helpful for a question of a test.
by Ian Morris 3C
Sun Oct 20, 2019 10:38 pm
Forum: Properties of Electrons
Topic: Mass of Proton, Electron and Neutron
Replies: 2
Views: 27

Mass of Proton, Electron and Neutron

Will we have to memorize the masses for each or will it be included on the reference sheet?
by Ian Morris 3C
Sun Oct 13, 2019 11:23 pm
Forum: Photoelectric Effect
Topic: Question from module
Replies: 5
Views: 43

Re: Question from module

Timmy Nguyen Dis 3F wrote:You could just use the mass of the electron, since it's going to be one of those numbers that are given on exams.


Is the mass of an electron on the reference sheet?
by Ian Morris 3C
Sun Oct 13, 2019 11:18 pm
Forum: Properties of Light
Topic: Atomic Spectra
Replies: 3
Views: 23

Re: Atomic Spectra

I am pretty sure that is all you need to know, since that is all he mentioned in lecture.
by Ian Morris 3C
Sun Oct 13, 2019 11:14 pm
Forum: Properties of Light
Topic: What is Threshold Energy?
Replies: 9
Views: 57

Re: What is Threshold Energy?

If I remember correctly, Threshold Energy is the minimum amount of energy needed to eject electrons from the surface.
by Ian Morris 3C
Sun Oct 13, 2019 11:08 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test 1 [ENDORSED]
Replies: 107
Views: 2846

Re: Test 1 [ENDORSED]

Angstroms are a unit of length equivalent to 10^(-10) m. I was taken aback by this question on the test as I do not ever remember being told we had to memorize the quant. value of Angstroms. Did I miss that in class, and if not how are we supposed to know what units/terms we are supposed the memori...
by Ian Morris 3C
Sun Oct 13, 2019 11:05 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Best Way To Study?
Replies: 56
Views: 390

Re: Best Way To Study?

I find personally that the best way to study is to complete the modules before anything, they are a great introduction and really help me grasp the concept that is being presented. Next I'll give a go at the homework problems that were assigned and if I have any problems with those I will do more pr...
by Ian Morris 3C
Thu Oct 03, 2019 12:35 am
Forum: Limiting Reactant Calculations
Topic: M 19
Replies: 2
Views: 34

M 19

I am not sure how to get the mass of Oxygen. I was able to get the mass of C, H, and N, but am confused on what to do from here.
by Ian Morris 3C
Wed Oct 02, 2019 11:51 pm
Forum: Empirical & Molecular Formulas
Topic: Naming Molecular Compounds
Replies: 6
Views: 53

Naming Molecular Compounds

I am a little confused as to how to name compounds. I understand simple ones such as molecular compounds, but I can't seem to remember how to name compounds such as in H.25, when it asks to "name the different phosphorus oxides".
by Ian Morris 3C
Wed Oct 02, 2019 12:59 am
Forum: Molarity, Solutions, Dilutions
Topic: Empirical and Molecular Formulas
Replies: 13
Views: 137

Re: Empirical and Molecular Formulas

I find the easiest way to remember is just to think of molar mass first whenever I hear molecular formula.
by Ian Morris 3C
Wed Oct 02, 2019 12:57 am
Forum: Significant Figures
Topic: General Rules to Help with Sig Figs
Replies: 18
Views: 212

Re: General Rules to Help with Sig Figs

I am confused as to when to apply sig figs. Should I apply them throughout my problem at each step, or just at the end?
by Ian Morris 3C
Wed Oct 02, 2019 12:53 am
Forum: Balancing Chemical Reactions
Topic: Tips for Balancing Chemical Equations [ENDORSED]
Replies: 14
Views: 163

Re: Tips for Balancing Chemical Equations [ENDORSED]

I often use a guess and check method as well, however, I have recently found it easier to start off by finding the molecule with the least amount of atoms on each side, then go from there.

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