## Search found 72 matches

Mon Mar 18, 2019 12:23 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: HW problem
Replies: 2
Views: 629

### Re: HW problem

Okay, thanks!!
Sat Mar 16, 2019 4:59 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: delta s
Replies: 3
Views: 374

### Re: delta s

This helps a lot. Thank you!
Sat Mar 16, 2019 2:54 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: delta s
Replies: 3
Views: 374

### delta s

Why is delta S of system negative when bonds are formed in a reaction?
Sat Mar 16, 2019 2:30 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Nernst equation
Replies: 1
Views: 112

### Nernst equation

What is the difference between E and Eo and how do we know whether we should use E = Eo -RT/nF ln Q or Eo =RT/nF ln K
Sat Mar 16, 2019 1:21 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: 4A.13
Replies: 1
Views: 284

### 4A.13

Can someone explain to me how to do 4A.13 in the textbook, the answer book doesnt seem to be answering the question it is asking.
Fri Mar 15, 2019 3:56 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: HW problem
Replies: 2
Views: 629

### HW problem

For question 7C.5 part b, why is HBrO included in the rate law if it is an intermediate?
Wed Mar 13, 2019 10:50 pm
Forum: Balancing Redox Reactions
Topic: HW problem
Replies: 2
Views: 110

### HW problem

In question 6K.1 A, why is it that C is being oxidized in the reaction?
Sat Mar 09, 2019 12:08 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: differential rate law equation
Replies: 3
Views: 145

### differential rate law equation

When would we have to use the differential rate law equation d[r]dt= k[R]^n ?
Sat Mar 09, 2019 12:06 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Reaction mechanisms
Replies: 2
Views: 113

### Re: Reaction mechanisms

I don't think so but if we do, the intermediate steps will probably be given and we just have to add them in the equation.
Sat Mar 09, 2019 12:03 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: integrated rate law
Replies: 2
Views: 115

### integrated rate law

Why is it that we only consider the reactants with integrated rate laws?
Sat Mar 09, 2019 12:01 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: catalyst/enzyme
Replies: 4
Views: 155

### catalyst/enzyme

Why doesn't a catalyst/enzyme change the reaction rate?
Sat Mar 09, 2019 12:00 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: zero order
Replies: 2
Views: 89

### zero order

What is the molecularity of a zero order reaction?
Sat Mar 09, 2019 11:59 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: reaction rate
Replies: 2
Views: 122

### reaction rate

Why does the slowest step determine the reaction rate?
Sun Feb 24, 2019 3:58 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Cell Diagram
Replies: 1
Views: 91

### Re: Cell Diagram

I don't think it matters as long as you match it with what your doing on the opposite side and if you watch out for positive and negative sign.
Sun Feb 24, 2019 3:56 pm
Forum: Balancing Redox Reactions
Topic: TEST
Replies: 7
Views: 309

### TEST

Will the test include the stuff we will learn during Monday's lecture? Will it include gibbs free energy?
Sun Feb 24, 2019 3:56 pm
Forum: Balancing Redox Reactions
Topic: salt bridge?
Replies: 3
Views: 124

### salt bridge?

What is the significance of the salt bridge?
Mon Feb 18, 2019 5:15 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Battery
Replies: 5
Views: 184

### Re: Battery

They are for sure closed systems
Mon Feb 18, 2019 5:14 pm
Forum: Administrative Questions and Class Announcements
Topic: 14BL and 14C
Replies: 5
Views: 436

### Re: 14BL and 14C

14BL is almost like adding another class but a little lighter
Mon Feb 18, 2019 5:11 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Spontaneity and exothermic reactions
Replies: 3
Views: 164

### Re: Spontaneity and exothermic reactions

Not the full answer but I know that since energy is released, no energy is required to start up the reaction
Mon Feb 18, 2019 5:10 pm
Forum: Student Social/Study Group
Topic: Best Midterm Review
Replies: 7
Views: 336

### Re: Best Midterm Review

When will exam grades be posted?
Mon Feb 18, 2019 5:08 pm
Forum: Van't Hoff Equation
Topic: vant hoff
Replies: 2
Views: 197

### vant hoff

Do we need a constant pressure or temperature to use the Vant Hoff equation?
Mon Feb 18, 2019 5:05 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Delta G
Replies: 4
Views: 168

### Delta G

Is delta g considered a state function?
Sat Feb 09, 2019 1:35 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: midterm [ENDORSED]
Replies: 4
Views: 198

### midterm[ENDORSED]

Which equations will be given to us and which won't be for the midterm?
Sat Feb 09, 2019 1:34 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: methods
Replies: 8
Views: 336

### methods

How do you know which method to use when dealing with bond enthalpies?
Sat Feb 09, 2019 1:34 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: delta H
Replies: 3
Views: 163

### delta H

what's the difference between delta H and delta H with the degree symbol?
Sat Feb 02, 2019 11:29 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Test Question
Replies: 4
Views: 214

### Re: Test Question

With Kc you must use molar concentrations but for Kp its partial pressures.
Sat Feb 02, 2019 11:28 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: pressure
Replies: 3
Views: 183

### pressure

How do we know when to assume the pressure of a system as 1 atm?
Sat Feb 02, 2019 11:27 am
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: open system
Replies: 8
Views: 318

### open system

How does an open beaker imply constant pressure?
Sun Jan 27, 2019 9:30 pm
Forum: Phase Changes & Related Calculations
Topic: state properties
Replies: 3
Views: 177

### state properties

What is a good and easy way of understanding state properties?
Tue Jan 22, 2019 9:19 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: acids and base
Replies: 1
Views: 99

### acids and base

In 6D.7 a) how do you find the Ka constant ?
Tue Jan 22, 2019 9:13 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: ice chart
Replies: 7
Views: 345

### ice chart

In a question, how are we able to tell when to use and ICE chart??
Tue Jan 22, 2019 9:12 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Acids and bases
Replies: 2
Views: 135

### Acids and bases

In questions 6D.3, how do you find the Kb constant? Im having a lot of trouble figuring that out.
Sun Jan 20, 2019 1:39 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: equations
Replies: 1
Views: 94

### equations

For the test are we given all equations? Are there any that we need to have memorized or that would be helpful to memorize?
Sun Jan 20, 2019 1:37 pm
Forum: Administrative Questions and Class Announcements
Topic: Discussion Section Test
Replies: 4
Views: 231

### Re: Discussion Section Test

Its all free response but sometimes he likes to throw in some conceptual multiple choice questions on the midterm and final.
Sun Jan 20, 2019 1:36 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: buffer questions on test
Replies: 7
Views: 256

### Re: buffer questions on test

Even though its not on there, I would learn it since he talked about it in lecture and therefore it could show up on an exam.
Sun Jan 13, 2019 4:21 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: constants
Replies: 4
Views: 185

### constants

Whats the difference betwen Kc Kp and Q?
Sun Jan 13, 2019 4:20 pm
Forum: Ideal Gases
Topic: gases
Replies: 3
Views: 81

### gases

Why do gases need to be converted from partial pressure to concentration?
Sun Jan 13, 2019 4:19 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: solids and liquids [ENDORSED]
Replies: 4
Views: 196

### solids and liquids[ENDORSED]

Why are solids and liquids not included in equilibrium?
Tue Dec 04, 2018 11:39 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strong Acids
Replies: 1
Views: 65

### Strong Acids

Do we assume that strong acids ionize 100%?
Tue Dec 04, 2018 11:38 pm
Forum: Bronsted Acids & Bases
Topic: Acids
Replies: 3
Views: 208

### Acids

Whats the difference between an acid, bronsted acid, and lewis acid?
Tue Dec 04, 2018 11:37 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands
Replies: 7
Views: 237

### Ligands

Do ligands have to have lone pairs?
Tue Nov 27, 2018 6:29 pm
Forum: Dipole Moments
Topic: LDF
Replies: 5
Views: 248

### LDF

Do all molecules have London dispersion forces?
Tue Nov 27, 2018 5:52 pm
Forum: Dipole Moments
Topic: dipole moment
Replies: 1
Views: 62

### dipole moment

Would AlCl3 have a net dipole moment?
Tue Nov 27, 2018 5:50 pm
Forum: Bond Lengths & Energies
Topic: polar
Replies: 2
Views: 195

### polar

What is the difference between polarizability and polarizing power?
Fri Nov 23, 2018 9:26 pm
Forum: Dipole Moments
Topic: Bond Angles
Replies: 8
Views: 355

### Re: Bond Angles

No better way than just memorizing them and more importantly understanding the 3-dimensional shapes and why the angles are what they are.
Wed Nov 21, 2018 11:28 am
Forum: Hybridization
Topic: bonds
Replies: 4
Views: 71

### bonds

How can a sigma bond turn into a pi bond?
Wed Nov 21, 2018 11:26 am
Forum: Lewis Structures
Topic: Complete Lewis Structures
Replies: 4
Views: 198

### Re: Complete Lewis Structures

Im pretty sure your fine with either one
Wed Nov 21, 2018 11:25 am
Forum: Hybridization
Topic: s character
Replies: 1
Views: 47

### s character

What is an S character of a hybrid orbital?
Tue Nov 13, 2018 10:15 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lewis Structures/Shape
Replies: 3
Views: 130

### Lewis Structures/Shape

How would you draw the Lewis structure for (ch3)2be? And what would its shape around the central atom be?
Tue Nov 13, 2018 10:09 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Shape
Replies: 5
Views: 179

### Shape

What is the difference between angular shape and bent shape?
Tue Nov 13, 2018 6:26 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: ClO2+
Replies: 7
Views: 556

### ClO2+

Why does the electron pair on central Cl atom of ClO2+ result in a trigonal planar arrangement?
Sun Nov 11, 2018 2:34 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: molecular shapes
Replies: 13
Views: 390

### molecular shapes

In class, Dr. Lavelle only reviewed a few of the molecular shapes. Should we be memorizing and learning how to draw all of the other ones as well?
Wed Nov 07, 2018 1:25 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: electron configuration of Niobium
Replies: 2
Views: 170

### Re: electron configuration of Niobium

[Kr] 4d4 5s1
Wed Nov 07, 2018 1:23 am
Forum: Trends in The Periodic Table
Topic: electron affinity
Replies: 2
Views: 339

### electron affinity

Does the electron affinity trend apply to the noble gasses?
Wed Nov 07, 2018 1:22 am
Forum: Octet Exceptions
Topic: Octet Exceptions
Replies: 4
Views: 243

### Octet Exceptions

What is an easy way to remember all of the exceptions of octet?
Wed Nov 07, 2018 1:21 am
Forum: Resonance Structures
Topic: bond length
Replies: 5
Views: 268

### bond length

How are bond lengths the same if there are two double bonds and one single bond? Is it bc of resonance?
Sun Nov 04, 2018 10:49 pm
Forum: Octet Exceptions
Topic: electron affinity
Replies: 6
Views: 259

### electron affinity

Why does cl have a higher electron affinity than f?
Wed Oct 31, 2018 1:58 am
Forum: Lewis Structures
Topic: Lewis Structures
Replies: 2
Views: 122

### Lewis Structures

When do you put lines and when do you put dots when drawing Lewis structures?
Wed Oct 31, 2018 12:27 am
Forum: Lewis Structures
Topic: Lewis Structures
Replies: 4
Views: 221

### Lewis Structures

Why does the B in BF3 only have 6 electrons in its Lewis structure?
Wed Oct 31, 2018 12:26 am
Forum: Octet Exceptions
Topic: Octet Exceptions
Replies: 3
Views: 234

### Octet Exceptions

What is an easy way to remember the octet exceptions?
Sun Oct 21, 2018 5:23 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Labeling Electron Orbitals
Replies: 5
Views: 245

### Re: Labeling Electron Orbitals

I would watch a youtube video to help explain this but basically, electrons fill up orbitals in the order of 1s, 2s, 2p, 3s, etc at is shown on the periodic table. In each orbital, an electron fills up in each pair before they start to pair up (general rule). The reason why they have opposite spins ...
Sun Oct 21, 2018 5:19 pm
Forum: Trends in The Periodic Table
Topic: Periodic Table
Replies: 2
Views: 127

### Periodic Table

Why are s-block metals typically more reactive than p-block metals?
Sun Oct 21, 2018 4:56 pm
Forum: Trends in The Periodic Table
Topic: Oxygen
Replies: 1
Views: 108

### Oxygen

Why does O have a lower ionization energy than N or F if ionization energy increases from left to right on the P table?
Tue Oct 16, 2018 11:40 pm
Forum: Properties of Electrons
Topic: electrons
Replies: 3
Views: 191

### electrons

In what way do electrons have wavelike properties?
Tue Oct 16, 2018 4:49 pm
Forum: Properties of Electrons
Replies: 3
Views: 177

How does the photoelectric effect support the idea that electromagnetic radiation has the properties of particles?
Tue Oct 16, 2018 4:41 pm
Forum: Properties of Light
Topic: Change in the electrical field
Replies: 1
Views: 79

### Change in the electrical field

Why does a decrease in the frequency of electromagnetic radiation cause the extent of the change in the electrical field at a given point to decrease?
Tue Oct 09, 2018 11:17 pm
Forum: Balancing Chemical Reactions
Topic: Chemical compounds
Replies: 3
Views: 230

### Chemical compounds

Do we need to know how to translate the name of chemical compounds into their respective formulas for the quiz?
Tue Oct 09, 2018 11:14 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Periodic Table
Replies: 3
Views: 203

### Periodic Table

When using the periodic table how do you know where to round off?
Tue Oct 09, 2018 5:48 pm
Forum: SI Units, Unit Conversions
Topic: Scientific Notation
Replies: 7
Views: 354

### Scientific Notation

When is it appropriate or not to convert your answer into scientific notation? For example, in the homework, I got an answer as 1330 while the solutions manual has the answer as 1.3x10^3. Does it even make a difference which answer I write?
Thu Oct 04, 2018 4:47 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8047
Views: 1412819

### Re: Post All Chemistry Jokes Here

Why aren't there any good chemistry jokes?

Because they all Argon.
Thu Oct 04, 2018 4:46 pm
Forum: Empirical & Molecular Formulas
Topic: Molecular Formulas
Replies: 5
Views: 341

### Re: Molecular Formulas

The molecular formula cannot be found in this question. Usually, the molecular mass is needed and the problem provides you with this information. In this question, C8H8O3 is the empirical formula found through the mass percentages. To find the molecular formula, you would need the MM.
Thu Oct 04, 2018 4:35 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 217
Views: 115289