Search found 170 matches

by Kallista McCarty 1C
Tue Feb 18, 2020 5:43 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: delta vs. delta naught
Replies: 3
Views: 12

Re: delta vs. delta naught

The naught symbolizes standard temperature and pressure (STP)
by Kallista McCarty 1C
Tue Feb 18, 2020 5:41 pm
Forum: Balancing Redox Reactions
Topic: Reduction vs. oxidation
Replies: 17
Views: 37

Re: Reduction vs. oxidation

It is based on electron transfer. I remember it by "OILRIG" Oxidation is losing e- and reduction is gaining e-
by Kallista McCarty 1C
Tue Feb 18, 2020 5:39 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Signs for Gibbs Free Energy
Replies: 11
Views: 25

Re: Signs for Gibbs Free Energy

Negative is spontaneous (exothermic) and positive is not spontaneous (endothermic)
by Kallista McCarty 1C
Tue Feb 18, 2020 5:39 pm
Forum: Balancing Redox Reactions
Topic: Reducing/Oxidizing Agent
Replies: 4
Views: 10

Re: Reducing/Oxidizing Agent

The reducing agent causes the reduction, so it is oxidized. The oxidizing agent causes the oxidizing, so it is reduced.
by Kallista McCarty 1C
Mon Feb 17, 2020 3:31 pm
Forum: Administrative Questions and Class Announcements
Topic: 14BL and 14C
Replies: 6
Views: 30

Re: 14BL and 14C

I have heard that it is doable to take those courses together!
by Kallista McCarty 1C
Fri Feb 14, 2020 6:59 pm
Forum: Ideal Gases
Topic: initial values
Replies: 6
Views: 22

Re: initial values

I think you use the initial!
by Kallista McCarty 1C
Fri Feb 14, 2020 6:56 pm
Forum: Ideal Gases
Topic: pv=nrt
Replies: 18
Views: 48

Re: pv=nrt

yes you can!
by Kallista McCarty 1C
Fri Feb 14, 2020 6:56 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Midterm Curve
Replies: 42
Views: 217

Re: Midterm Curve

I'm not sure if there is an official "curve" but all you need is a 50% overall in the class to pass with a C
by Kallista McCarty 1C
Fri Feb 14, 2020 6:54 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K
Replies: 11
Views: 30

Re: K

You use gaseous and aqueous! You don't put in solids or liquids
by Kallista McCarty 1C
Fri Feb 14, 2020 6:53 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Isobaric systems
Replies: 16
Views: 33

Re: Isobaric systems

Isobaric is constant temperature!
by Kallista McCarty 1C
Mon Feb 10, 2020 9:03 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Delta S sub m
Replies: 2
Views: 10

Re: Delta S sub m

The m refers to molar in this problem!
by Kallista McCarty 1C
Mon Feb 10, 2020 9:02 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 12
Views: 46

Re: Midterm

The midterm is Wednesday from 6-8. You can find your exact location depending on which lecture you are in and your last name on Lavelle's website. There is no lecture that day, but there is a small Q&A review session with a couple TAs during normal lecture time if you have last minute questions!
by Kallista McCarty 1C
Mon Feb 10, 2020 8:59 pm
Forum: Administrative Questions and Class Announcements
Topic: HW 6
Replies: 3
Views: 17

Re: HW 6

You can do any problems for this week! The most recent outline that we covered in class was thermodynamics, but you can turn in any problems as long as they are not ones that you have previously turned in!
by Kallista McCarty 1C
Mon Feb 10, 2020 8:58 pm
Forum: Phase Changes & Related Calculations
Topic: Reversible or Irreversible
Replies: 5
Views: 17

Re: Reversible or Irreversible

You should be able to tell given the context of the problem!
by Kallista McCarty 1C
Mon Feb 10, 2020 8:56 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Spontaneous delta G
Replies: 7
Views: 21

Re: Spontaneous delta G

A reaction is spontaneous when delta G is negative, so by setting it to zero we were able to find the value and then determine the answer as "above 333K"
by Kallista McCarty 1C
Fri Feb 07, 2020 12:33 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Irreversible v Reversible
Replies: 4
Views: 25

Re: Irreversible v Reversible

Irreversible occurs under a constant pressure and reversible occurs under changing pressures.
by Kallista McCarty 1C
Fri Feb 07, 2020 12:31 pm
Forum: Student Social/Study Group
Topic: Midterm Topics
Replies: 12
Views: 66

Re: Midterm Topics

Everything that was covered up to the end of today's lecture will be included on the midterm!
by Kallista McCarty 1C
Fri Feb 07, 2020 12:29 pm
Forum: Calculating Work of Expansion
Topic: Isothermal
Replies: 17
Views: 70

Re: Isothermal

Isothermal means that there is a constant temperature and that delta U is also equal to 0
by Kallista McCarty 1C
Fri Feb 07, 2020 12:28 pm
Forum: Administrative Questions and Class Announcements
Topic: Grading
Replies: 7
Views: 51

Re: Grading

You need a 50% to pass the class with a C-. The other letter grades are determined by the class average.
by Kallista McCarty 1C
Fri Feb 07, 2020 12:26 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Midterm Equations
Replies: 4
Views: 21

Re: Midterm Equations

You can find all the equations that we will be given on Lavelle's website on the constant and equations sheet! It is good to look at it to familiarize yourself with the ones that you'll need!
by Kallista McCarty 1C
Tue Feb 04, 2020 4:54 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: Big Midterm Review
Replies: 4
Views: 46

Re: Big Midterm Review

I think it was changed to Sunday because there were a lot of students who could not go Monday due to the LS30B midterm
by Kallista McCarty 1C
Tue Feb 04, 2020 4:53 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Topics on the Midterm
Replies: 22
Views: 85

Re: Topics on the Midterm

The midterm will cover everything until the end of the thermodynamics outline! He should finish lecturing on it this week
by Kallista McCarty 1C
Tue Feb 04, 2020 4:51 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: closed vs isolated
Replies: 14
Views: 41

Re: closed vs isolated

Heat can be transferred with the surroundings in a closed system but matter cannot. Neither can be transferred with the surroundings in an isolated system.
by Kallista McCarty 1C
Tue Feb 04, 2020 4:50 pm
Forum: Administrative Questions and Class Announcements
Topic: Step Up Sessions
Replies: 12
Views: 469

Re: Step Up Sessions

for anyone that's been, have you found them helpful/how is the pace of the step-up sessions I go to Jonathan's sessions and I find them extremely helpful! He goes over homework and old test questions and explains the important concepts/equations from lecture and the different contexts that they can...
by Kallista McCarty 1C
Tue Feb 04, 2020 4:48 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 1 Distribution
Replies: 9
Views: 71

Re: Test 1 Distribution

Lavelle does not give out distribution curves for his test so it is hard to see how you compare
by Kallista McCarty 1C
Thu Jan 30, 2020 5:16 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Test 1 Problem 5
Replies: 1
Views: 27

Test 1 Problem 5

Can someone explain question 5 from the test (the pKa of triethylamine cation is 11.04. A 0.2M solution or triethylamine was made to use as a weak base in the synthesis of a new pharmaceutical. What is the pH of this solution at equilibrium?)
by Kallista McCarty 1C
Thu Jan 30, 2020 5:16 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Test 1 Problem 5
Replies: 1
Views: 20

Test 1 Problem 5

Can someone explain question 5 from the test (the pKa of triethylamine cation is 11.04. A 0.2M solution or triethylamine was made to use as a weak base in the synthesis of a new pharmaceutical. What is the pH of this solution at equilibrium?)
by Kallista McCarty 1C
Thu Jan 30, 2020 5:13 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Qv vs Qp
Replies: 7
Views: 23

Re: Qv vs Qp

qv is constant volume and qp is constant pressure
by Kallista McCarty 1C
Thu Jan 30, 2020 5:11 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Test 1 Problem 1
Replies: 1
Views: 26

Test 1 Problem 1

Can someone explain problem 1 a) calculate the concentration of each species at equilibrium?
by Kallista McCarty 1C
Thu Jan 30, 2020 5:10 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Test #1// #6
Replies: 2
Views: 26

Re: Test #1// #6

The pH is 2.92, so the H+ concentration is 10^-2.92 = 1.20 x 10^-3. The pOH is 14-2.92=11.08. The OH- concentration is 10^-11.08 = 8.32 x 10^-12. The Ka is equal to the H+ concentration which is 1.20 x 10^-3. The percent ionization is (1.20 x 10^-3)/(0.010) x 100% = 12%.
by Kallista McCarty 1C
Tue Jan 28, 2020 4:16 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: delta H units
Replies: 4
Views: 16

Re: delta H units

I believe it should be kJ/mol, but my TA has used just kJ when writing out the problem and then just inserted kJ/mol at the end. I think it is just a convenience thing!
by Kallista McCarty 1C
Tue Jan 28, 2020 4:12 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: qp vs qv
Replies: 6
Views: 22

Re: qp vs qv

qp just shows constant pressure and qv shows constant volume.
by Kallista McCarty 1C
Tue Jan 28, 2020 4:11 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Test 2
Replies: 7
Views: 46

Re: Test 2

It will only focus on the material covered in the weeks after the midterm! There won't be any content from before that on the second test
by Kallista McCarty 1C
Tue Jan 28, 2020 4:09 pm
Forum: Ideal Gases
Topic: Chemical Equilibrium
Replies: 4
Views: 16

Re: Chemical Equilibrium

Catalysts are used to speed up reactions, but they do not have an effect on the equilibrium constant!
by Kallista McCarty 1C
Tue Jan 28, 2020 4:08 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Adding Enthalpies
Replies: 5
Views: 17

Re: Adding Enthalpies

You add the enthalpies since they are state functions!
by Kallista McCarty 1C
Thu Jan 23, 2020 5:15 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Kw = (Ka)(Kb)
Replies: 4
Views: 19

Re: Kw = (Ka)(Kb)

Yes, if no temperature is stated you can assume 25 Celsius to solve!
by Kallista McCarty 1C
Thu Jan 23, 2020 5:14 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Approximation
Replies: 5
Views: 20

Re: Approximation

When K is smaller than 10^-3!
by Kallista McCarty 1C
Thu Jan 23, 2020 5:12 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: pKa/pKb and Ka/Kb
Replies: 5
Views: 19

Re: pKa/pKb and Ka/Kb

Ka = 10^-pKa
Kb = 10^-pKb
by Kallista McCarty 1C
Thu Jan 23, 2020 5:10 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K value
Replies: 7
Views: 20

Re: K value

You approximate if K is smaller than 10^-3
by Kallista McCarty 1C
Thu Jan 23, 2020 5:09 pm
Forum: Student Social/Study Group
Topic: Midterm and Final Question
Replies: 12
Views: 88

Re: Midterm and Final Question

The UA's typically will put together a worksheet and post it on here, but Lavelle does not give one out.
by Kallista McCarty 1C
Mon Jan 20, 2020 3:19 pm
Forum: Ideal Gases
Topic: R constant for PV=nRT
Replies: 7
Views: 30

Re: R constant for PV=nRT

The R value will be given on the constant and equations sheet on the test! I know that there are different units that you use depending on the question, but they will both be given
by Kallista McCarty 1C
Mon Jan 20, 2020 3:18 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Van’t Hoff Equation
Replies: 4
Views: 26

Re: Van’t Hoff Equation

I don't think Lavelle has ever discussed this in lecture, so we won't be asked to use it on the test!
by Kallista McCarty 1C
Mon Jan 20, 2020 3:17 pm
Forum: Administrative Questions and Class Announcements
Topic: Workshop Monday
Replies: 2
Views: 53

Re: Workshop Monday

There is a workshop session from 6-8 and drop ins from 8-9, but it does not say who is holding them.
by Kallista McCarty 1C
Mon Jan 20, 2020 3:15 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 5I.25
Replies: 2
Views: 13

Re: 5I.25

If K is smaller than 10^-3 then you can use the approximation method Lavelle taught us in lecture!
by Kallista McCarty 1C
Mon Jan 20, 2020 3:14 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kw temperature
Replies: 8
Views: 27

Re: Kw temperature

Kw is measured at 25 degrees celsius!
by Kallista McCarty 1C
Fri Jan 17, 2020 3:12 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Value of Kw
Replies: 6
Views: 25

Re: Value of Kw

Kw is always equal to 1.0 x 10^-14 at 25 degrees celsius!
by Kallista McCarty 1C
Wed Jan 15, 2020 8:22 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Ka + Kb
Replies: 6
Views: 22

Re: Ka + Kb

This is irrelevant to the stated question, but does anyone know if we can still turn in chemical equilibrium hw questions for week 2? Or does it have to be acids and bases? Since we still covered chemical equilibrium this week, you can turn in problems from that section as long as they are differen...
by Kallista McCarty 1C
Wed Jan 15, 2020 8:20 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: When to use K and Kp
Replies: 12
Views: 36

Re: When to use K and Kp

Kristina Rizo 2K wrote:I thought Kp was used for gas only? Can someone clarify this please.

Kp is used for gases to determine partial pressures! Kc is used for concentrations and Ka and Kb are for acids and bases.
by Kallista McCarty 1C
Wed Jan 15, 2020 8:19 pm
Forum: Administrative Questions and Class Announcements
Topic: Study Guide Test One
Replies: 17
Views: 86

Re: Study Guide Test One

There isn't one given out, but it is good to base your studying on the learning outcomes for the sections.
by Kallista McCarty 1C
Mon Jan 13, 2020 1:44 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Q=K
Replies: 14
Views: 37

Re: Q=K

When Q=K the reaction is at equilibrium. When Q<K the forward reaction is favored and when Q>K the reverse reaction is favored.
by Kallista McCarty 1C
Mon Jan 13, 2020 1:41 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Units for K
Replies: 21
Views: 57

Re: Units for K

Since K is a constant it does not have units associated with it!
by Kallista McCarty 1C
Mon Jan 13, 2020 1:41 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Hw for next week
Replies: 19
Views: 65

Re: Hw for next week

You can do homework on chemical equilibria or acids and bases. Just make sure it is different problems than the ones that you did last week!
by Kallista McCarty 1C
Mon Jan 13, 2020 1:39 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: What is this?
Replies: 23
Views: 132

Re: What is this?

The principle works to minimize the change on the reaction by shifting the direction that the reaction takes place in order to maintain equilibrium.
by Kallista McCarty 1C
Mon Jan 13, 2020 1:37 pm
Forum: Ideal Gases
Topic: Topics for Test 1
Replies: 17
Views: 96

Re: Topics for Test 1

I think it will be on chemical equilibria and acids and bases! I find it helpful to go to the peer learning sessions in Covel because they typically cover the test topics!
by Kallista McCarty 1C
Thu Jan 09, 2020 5:21 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K
Replies: 3
Views: 16

Re: K

I think you would convert one to the other! Lavelle gave us the equation PV=nRT for this! concentration x RT is the pressure.
by Kallista McCarty 1C
Thu Jan 09, 2020 5:19 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Using Kc Vs Kp
Replies: 18
Views: 85

Re: Using Kc Vs Kp

You should be able to tell based on the question that is being asked!
by Kallista McCarty 1C
Thu Jan 09, 2020 5:18 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Q
Replies: 2
Views: 19

Re: Q

Q is the reaction quotient, so you use it to compare to equilibrium. You can use it to study biological systems like rivers when you do not know which way the reaction is occurring. If Q<K the forward reaction is favored and if Q>K then the reverse reaction is favored.
by Kallista McCarty 1C
Thu Jan 09, 2020 5:15 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: kc and kp
Replies: 3
Views: 15

Re: kc and kp

They both represent equilibrium constants! Kc is for concentration and Kp is for pressures of gasses. You can convert concentration into pressure by doing the concentration x RT.
by Kallista McCarty 1C
Thu Jan 09, 2020 5:14 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K = 1
Replies: 2
Views: 8

Re: K = 1

I don't think Lavelle gave an exact example of this in lecture. He just said that is very rare and occurs when the energy of the reactants and products are equal!
by Kallista McCarty 1C
Tue Jan 07, 2020 11:53 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 5G11
Replies: 5
Views: 58

Re: 5G11

P is used to represent partial pressures of gasses while the brackets represent concentration (molarity, mol/L)
by Kallista McCarty 1C
Tue Jan 07, 2020 11:52 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Hw Problem G2
Replies: 5
Views: 50

Re: Hw Problem G2

It is true because K is constant. The forward and reverse reactions both occur when equilibrium is reached.
by Kallista McCarty 1C
Tue Jan 07, 2020 11:50 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kc versus K
Replies: 4
Views: 32

Re: Kc versus K

K is just the general notation for the equilibrium constant! Kc just represents the concentrations, but they mean the same thing overall
by Kallista McCarty 1C
Mon Jan 06, 2020 7:28 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 5G.3
Replies: 8
Views: 58

Re: 5G.3

This is because the reaction only involves gasses so partial pressures are used!
by Kallista McCarty 1C
Mon Jan 06, 2020 7:23 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Value of K
Replies: 1
Views: 29

Value of K

What does it mean when the reaction has a value of K that is greater that 1? (K>1)
by Kallista McCarty 1C
Sat Dec 07, 2019 11:00 pm
Forum: General Science Questions
Topic: Curve
Replies: 9
Views: 128

Re: Curve

He makes it to where 50% is a C and then he adjusts other grades accordingly, but I don't think that there is a set scale for what an A is.
by Kallista McCarty 1C
Sat Dec 07, 2019 8:16 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Equilibrium calculations
Replies: 6
Views: 46

Equilibrium calculations

Will we be expected to do any equilibrium calculations for acids and bases on the final or is that 14b? I know Lavelle mentioned them, but I can't remember if we are tested on them.
by Kallista McCarty 1C
Sat Dec 07, 2019 8:08 pm
Forum: Calculating the pH of Salt Solutions
Topic: Titrations
Replies: 6
Views: 68

Titrations

What do we need to know about titrations for the final? Will there be any calculations or it is all conceptual?
by Kallista McCarty 1C
Sat Dec 07, 2019 12:44 pm
Forum: General Science Questions
Topic: Final
Replies: 3
Views: 71

Re: Final

One of the UAs said that there will likely just be one question from review of high school chem (probably limiting reactant or empirical formula) and one on photoelectric effect/quantum. I think the majority of the test will be weighted after the midterm (VSEPR, acids/bases, compound naming)
by Kallista McCarty 1C
Thu Dec 05, 2019 8:36 pm
Forum: Conjugate Acids & Bases
Topic: Double Arrows
Replies: 3
Views: 27

Re: Double Arrows

Double arrows just show that the reaction is reversible! It is a good habit to get into to use them when writing the equations for weak acids and bases but I don't think it is required.
by Kallista McCarty 1C
Thu Dec 05, 2019 8:18 pm
Forum: Biological Examples
Topic: Coordination Number vs Oxidation State
Replies: 2
Views: 20

Coordination Number vs Oxidation State

What is the difference between a coordination number and oxidation state?
by Kallista McCarty 1C
Thu Dec 05, 2019 1:28 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: -ate
Replies: 11
Views: 67

Re: -ate

You use -ate when there is a negative charge
by Kallista McCarty 1C
Thu Dec 05, 2019 1:27 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: using Ka and Pka
Replies: 4
Views: 27

Re: using Ka and Pka

You will be given a Ka or pKa for weak acids. You'll get a Kb or pKb for weak bases! You use them to compare their relative strengths to one another.
by Kallista McCarty 1C
Tue Dec 03, 2019 7:07 am
Forum: Naming
Topic: Cobalt vs Cobaltate
Replies: 3
Views: 24

Re: Cobalt vs Cobaltate

-ate is added to coordination compounds when there is an overall net negative charge. It is meant to sound funny so you realize it is negatively charged.
by Kallista McCarty 1C
Mon Dec 02, 2019 9:52 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Exam Location
Replies: 11
Views: 70

Re: Final Exam Location

The final locations are posted on his website under "Final Exam Locations and Review Sessions"
by Kallista McCarty 1C
Mon Dec 02, 2019 9:50 pm
Forum: Industrial Examples
Topic: Which examples?
Replies: 3
Views: 44

Re: Which examples?

You should know how to do all the problems listed on the outlines on Lavelle's website!
by Kallista McCarty 1C
Mon Dec 02, 2019 9:49 pm
Forum: Naming
Topic: Memorizing
Replies: 9
Views: 55

Re: Memorizing

I believe that we have to memorize the coordination compound chart that Lavelle emailed out to us.
by Kallista McCarty 1C
Mon Dec 02, 2019 9:47 pm
Forum: Student Social/Study Group
Topic: Practice Final
Replies: 17
Views: 237

Re: Practice Final

There is a worksheet under "marshmallow" for the review session on Friday night that would probably be helpful!
by Kallista McCarty 1C
Mon Dec 02, 2019 9:46 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Today's lecture
Replies: 5
Views: 41

Re: Today's lecture

Today we went over salts as acids and bases! Ions as acids are typically cations. A salt containing a base will raise the pH of the solution (making it more basic).
by Kallista McCarty 1C
Mon Dec 02, 2019 3:37 pm
Forum: Naming
Topic: Oxidation state
Replies: 2
Views: 26

Re: Oxidation state

By oxidation state, are you referring to the charge of an individual atom (ie Fe^3+)? If so, let me try to explain with an example. Suppose you have the molecule Fe(OH)3. Here , we know OH has a negative charge of 1 but the overall compound is neutral. Therefore, Fe has to have a positive three cha...
by Kallista McCarty 1C
Mon Dec 02, 2019 3:37 pm
Forum: General Science Questions
Topic: Bruincasts
Replies: 9
Views: 124

Re: Bruincasts

Lavelle's lectures are not bruincasted and he does not post his slides. Reading through the textbook may help clarify some of the topics!
by Kallista McCarty 1C
Mon Dec 02, 2019 9:52 am
Forum: Naming
Topic: Oxidation state
Replies: 2
Views: 26

Oxidation state

How do you determine the oxidation state of a metal?
by Kallista McCarty 1C
Wed Nov 27, 2019 5:43 pm
Forum: Naming
Topic: Chelating Complex
Replies: 4
Views: 32

Re: Chelating Complex

Thank you!
by Kallista McCarty 1C
Wed Nov 27, 2019 5:42 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Inorganic vs organic
Replies: 5
Views: 27

Re: Inorganic vs organic

If it contains Carbon it is organic! Anything else (not having carbon) is inorganic.
by Kallista McCarty 1C
Wed Nov 27, 2019 5:41 pm
Forum: Lewis Acids & Bases
Topic: Proton acceptor and proton donor?
Replies: 33
Views: 139

Re: Proton acceptor and proton donor?

The Bronsted definition says that acids are proton donors and bases are proton acceptors!
by Kallista McCarty 1C
Mon Nov 25, 2019 8:13 pm
Forum: Naming
Topic: -ate ending
Replies: 8
Views: 48

Re: -ate ending

ate is added to the end when the complex has an overall negative charge!
by Kallista McCarty 1C
Mon Nov 25, 2019 4:29 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: How do you know is an acid is strong or weak?
Replies: 6
Views: 51

Re: How do you know is an acid is strong or weak?

Strong acids completely dissociate in water while weak acids do not fully dissociate.
by Kallista McCarty 1C
Mon Nov 25, 2019 4:26 pm
Forum: Air Pollution & Acid Rain
Topic: Clean Coal vs Dirty Coal?
Replies: 16
Views: 123

Re: Clean Coal vs Dirty Coal?

Clean coal has a lower sulfur content than dirty coal.
by Kallista McCarty 1C
Mon Nov 25, 2019 4:25 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination compound
Replies: 5
Views: 42

Re: Coordination compound

They can all be used interchangeably!
by Kallista McCarty 1C
Mon Nov 25, 2019 4:24 pm
Forum: Naming
Topic: Chelating Complex
Replies: 4
Views: 32

Chelating Complex

What exactly is a chelating complex?
by Kallista McCarty 1C
Mon Nov 25, 2019 4:23 pm
Forum: Lewis Acids & Bases
Topic: Proton acceptor and proton donor?
Replies: 33
Views: 139

Re: Proton acceptor and proton donor?

Acids are proton donors and bases are proton acceptors!
by Kallista McCarty 1C
Wed Nov 20, 2019 7:54 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: Ion-dipole vs hydrogen bonding
Replies: 2
Views: 16

Re: Ion-dipole vs hydrogen bonding

I believe the order from strongest to weakest is : ion-ion > ion-dipole > hydrogen bonds > dipole-dipole > induced dipole-dipole > Londons
by Kallista McCarty 1C
Tue Nov 19, 2019 9:26 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Can linear molecular shapes have lone pair?
Replies: 4
Views: 30

Re: Can linear molecular shapes have lone pair?

Linear molecules can have lone pairs and still have a bond angle of 180! AXE, AXE2, and AXE3 are all linear with lone pairs
by Kallista McCarty 1C
Tue Nov 19, 2019 9:06 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Regions of electron density
Replies: 5
Views: 46

Re: Regions of electron density

VSEPR Table.pdf
This is what my TA sent out! You only need to know what is highlighted in green
(103.99 KiB) Downloaded 16 times


Really? Do you know where I can find his post??[/quote]
by Kallista McCarty 1C
Tue Nov 19, 2019 3:24 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 4
Views: 32

Re: Bond Angles

When there is a lone pair there is more electron-electron repulsion, so the bond angles will be slightly less than the shape that has no lone pairs.

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