Search found 56 matches

by Kayla Ikemiya 1E
Thu Mar 15, 2018 11:07 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: 15.101b
Replies: 3
Views: 145

Re: 15.101b

Also, why is H20 not included in the K of the first step reaction? Is it because it's a catalyst?
by Kayla Ikemiya 1E
Thu Mar 15, 2018 11:06 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: 15.101b
Replies: 3
Views: 145

Re: 15.101b

^I agree. Shouldn't you use the K of the 3rd step reaction and substitute that in for OH-?
by Kayla Ikemiya 1E
Thu Mar 15, 2018 10:45 am
Forum: *Enzyme Kinetics
Topic: Question 15.85
Replies: 4
Views: 454

Re: Question 15.85

Can someone please explain how we draw the activated complex?
by Kayla Ikemiya 1E
Tue Mar 13, 2018 10:39 am
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Hw 15.67
Replies: 5
Views: 323

Re: Hw 15.67

Where did this catalyzed/uncatalyzed set up come from?
by Kayla Ikemiya 1E
Mon Mar 12, 2018 10:27 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: 15.63
Replies: 1
Views: 122

Re: 15.63

Why isn't it ln(k2, k1)=Ea/R((1/T1)-(1/T2)? Thats what I used and got the same answer as the solutions manual.
by Kayla Ikemiya 1E
Mon Mar 12, 2018 12:18 pm
Forum: Administrative Questions and Class Announcements
Topic: FINAL
Replies: 9
Views: 581

Re: FINAL

Good morning! Are the functional groups that Dr. Lavelle went over in class going to be on the final as well? Just wondering because this was not part of the Kinetics syllabus :)
by Kayla Ikemiya 1E
Sun Mar 11, 2018 11:13 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Intermediates
Replies: 6
Views: 207

Re: Intermediates

Yes, it would still be an intermediate because it helped to promote the reaction to the next step and is not a final product in the overall reaction.
by Kayla Ikemiya 1E
Sun Mar 11, 2018 11:10 pm
Forum: Administrative Questions and Class Announcements
Topic: FINAL
Replies: 9
Views: 581

FINAL

How much of Chapter 15 will be on the final? Will we have time to cover everything?
by Kayla Ikemiya 1E
Thu Mar 08, 2018 9:53 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Slow step
Replies: 3
Views: 97

Re: Slow step

Isn't it determined by the likelihood that the molecules of the reactants will collide simultaneously?
by Kayla Ikemiya 1E
Thu Mar 08, 2018 9:52 am
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Slow step
Replies: 3
Views: 97

Re: Slow step

How do you know it has a smaller k value?
by Kayla Ikemiya 1E
Thu Mar 08, 2018 9:51 am
Forum: Administrative Questions and Class Announcements
Topic: practice final?
Replies: 4
Views: 321

Re: practice final?

Hi, I noticed that Lyndon was only reviewing Electrochemistry and Kinetics. DOES THIS MEAN NO PRACTICE FINAL????
by Kayla Ikemiya 1E
Mon Mar 05, 2018 7:05 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: How to tell difference btwn thermo and kinetics [ENDORSED]
Replies: 7
Views: 338

Re: How to tell difference btwn thermo and kinetics [ENDORSED]

Can you please provide an example problem where we would have to apply this concept?
by Kayla Ikemiya 1E
Thu Mar 01, 2018 5:45 pm
Forum: First Order Reactions
Topic: 15.27
Replies: 6
Views: 341

Re: 15.27

Never mind I see that there’s different ways to add/subtract things to both sides. I’m a brick
by Kayla Ikemiya 1E
Thu Mar 01, 2018 5:40 pm
Forum: First Order Reactions
Topic: 15.27
Replies: 6
Views: 341

Re: 15.27

For part c, shouldn’t you get on (0.15) when subtracting the natural log of the concentrations instead of ln (1/0.15)?
by Kayla Ikemiya 1E
Tue Feb 20, 2018 11:52 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 14.11d
Replies: 1
Views: 83

14.11d

How do you come up with the oxidizing half reduction? Why is H+ on the same side as the O2?
by Kayla Ikemiya 1E
Tue Feb 20, 2018 11:51 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 14.13b
Replies: 2
Views: 118

Re: 14.13b

What indicates that the reaction occurs in the same solution?
by Kayla Ikemiya 1E
Tue Feb 13, 2018 10:46 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: 8.53
Replies: 2
Views: 92

Re: 8.53

how can we assume that there is no work being done?
by Kayla Ikemiya 1E
Sat Feb 10, 2018 6:48 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: 9.71b
Replies: 1
Views: 125

9.71b

Can someone please give me a better answer than the one in the solutions manual? How would you be able to tell whether the phase change would change the answer without looking at the values?
by Kayla Ikemiya 1E
Sat Feb 10, 2018 5:36 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: 9.65d
Replies: 1
Views: 76

Re: 9.65d

or because it does not have a significant impact on the whether the delta S value is positive the S(s) is irrelevant regarding which solid state it is in?
by Kayla Ikemiya 1E
Sat Feb 10, 2018 5:35 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: 9.65d
Replies: 1
Views: 76

9.65d

How do you know which solid state of S(s) to use for the standard entropy?
by Kayla Ikemiya 1E
Sun Feb 04, 2018 8:36 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: combustion
Replies: 4
Views: 169

Re: combustion

Yes, the equation was provided in the book and by Dr. Lavelle.
by Kayla Ikemiya 1E
Sun Feb 04, 2018 8:33 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Problem 9.19 about Standard Entropy
Replies: 6
Views: 181

Re: Problem 9.19 about Standard Entropy

You have to cool it down to find the standard entropy of vaporization for 85 degrees not 100.
by Kayla Ikemiya 1E
Sun Feb 04, 2018 8:31 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: 9.13
Replies: 7
Views: 225

Re: 9.13

We use Cv because N2 is an ideal gas, so we used 5/2R because N2 is diatomic. My TA said that the answer in the solutions manual was wrong. Hope this helps!
by Kayla Ikemiya 1E
Sun Jan 28, 2018 8:34 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Question from test?
Replies: 4
Views: 198

Re: Question from test?

Closed system. The ice pack can still exchange heat with its surroundings (keeping a sandwich in your lunch bag cold), but it cannot exchange matter.
by Kayla Ikemiya 1E
Sun Jan 28, 2018 8:24 pm
Forum: Calculating Work of Expansion
Topic: work done on and by the system
Replies: 12
Views: 562

Re: work done on and by the system

When work is positive, work is done on the system. When work is negative, work is done by the system.
by Kayla Ikemiya 1E
Sun Jan 21, 2018 1:11 pm
Forum: Phase Changes & Related Calculations
Topic: Test 1 translation and rotational energy?
Replies: 1
Views: 78

Test 1 translation and rotational energy?

Will translational and rotational energy be on the test? I don't remember it being covered in lecture, but would just like to double check. Thanks.
by Kayla Ikemiya 1E
Sun Jan 21, 2018 12:50 pm
Forum: Phase Changes & Related Calculations
Topic: question 8.41
Replies: 5
Views: 260

Re: question 8.41

why do you not use q=nCdT because dH is the molar enthalpy of change?
by Kayla Ikemiya 1E
Tue Jan 16, 2018 2:13 pm
Forum: Calculating Work of Expansion
Topic: Homework Question 8.3
Replies: 4
Views: 234

Re: Homework Question 8.3

Thank you that makes so much sense!
by Kayla Ikemiya 1E
Tue Jan 16, 2018 2:12 pm
Forum: Phase Changes & Related Calculations
Topic: 8.37
Replies: 3
Views: 123

Re: 8.37

Shoot just saw this. Thank you Kelly!
by Kayla Ikemiya 1E
Tue Jan 16, 2018 2:11 pm
Forum: Phase Changes & Related Calculations
Topic: 8.37
Replies: 3
Views: 123

Re: 8.37

nevermind I understand now
by Kayla Ikemiya 1E
Tue Jan 16, 2018 10:24 am
Forum: Phase Changes & Related Calculations
Topic: 8.37
Replies: 3
Views: 123

8.37

How do you know how to find the enthalpy? I don't understand how they derived the answer in the solutions manual.
by Kayla Ikemiya 1E
Sun Jan 14, 2018 3:00 pm
Forum: Calculating Work of Expansion
Topic: Homework Question 8.3
Replies: 4
Views: 234

Re: Homework Question 8.3

How do you know that q is 0 when finding the internal energy?
by Kayla Ikemiya 1E
Sat Dec 09, 2017 8:52 pm
Forum: Administrative Questions and Class Announcements
Topic: Practice Test Fall 2017 [ENDORSED]
Replies: 19
Views: 2072

Re: Practice Test Fall 2017 [ENDORSED]

Is MO theory going to be on the final? It's in the course reader and I've seen a few questions asked about it on Chem Community.
by Kayla Ikemiya 1E
Sat Dec 09, 2017 8:24 pm
Forum: Administrative Questions and Class Announcements
Topic: Final [ENDORSED]
Replies: 6
Views: 516

Re: Final [ENDORSED]

104917030 wrote:correct me if I am wrong but Dr. Lavelle did say that salts would not be on the final because we did not go over that lesson in class, due to classes being cancelled because of the fire.
THIS IS NOT ON THE FINAL
by Kayla Ikemiya 1E
Sat Dec 09, 2017 1:07 pm
Forum: Naming
Topic: Differences between systems of naming [ENDORSED]
Replies: 1
Views: 182

Differences between systems of naming [ENDORSED]

If you name a compound using the UPAC method (bromido rather than bromo) and then name CN- with a bond on the nitrogen "isocyano" (as seen in the book) would that be considered breaking the rules? Should you call it "isocyanido" to be consistent with the UPAC naming system?
by Kayla Ikemiya 1E
Sat Dec 09, 2017 12:52 pm
Forum: Administrative Questions and Class Announcements
Topic: Practice Test Fall 2017 [ENDORSED]
Replies: 19
Views: 2072

Re: Practice Test Fall 2017 [ENDORSED]

On worksheet 7:
1. Would we be marked down for putting the concentrations in brackets? Never heard of this...
4. Why was en put before Iodide? I thought anionic ligands were supposed to be put before neutral when writing the formula?
by Kayla Ikemiya 1E
Thu Dec 07, 2017 11:22 am
Forum: Administrative Questions and Class Announcements
Topic: REVIEW WORKSHEET (CH 3 & 4) FALL 2017 [ENDORSED]
Replies: 5
Views: 731

Re: REVIEW WORKSHEET (CH 3 & 4) FALL 2017 [ENDORSED]

Hi, given the circumstances at hand, can you please post the solutions?
by Kayla Ikemiya 1E
Sun Dec 03, 2017 11:10 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: 12.29
Replies: 1
Views: 122

12.29

When trying to find the pOH, should we write out the chemical equation? Also, why do bases not react with water?
by Kayla Ikemiya 1E
Sun Dec 03, 2017 11:08 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: 12.45 [ENDORSED]
Replies: 2
Views: 182

12.45 [ENDORSED]

So the back of the book has two different ways of arriving at the fact that 2,4,6 trichlorophenol. Is it enough to just look at which compound has a greater Ka value or do we need to know that the chlorine atoms have a greater withdrawing power?
by Kayla Ikemiya 1E
Sun Nov 26, 2017 8:45 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 45 part c
Replies: 1
Views: 99

45 part c

How do you figure out which one is more stable?
by Kayla Ikemiya 1E
Sun Nov 26, 2017 8:44 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: #7
Replies: 1
Views: 101

#7

Can someone please explain to me what the diagrams represent and how you can tell which state of the equation it's in?
by Kayla Ikemiya 1E
Sun Nov 19, 2017 5:10 pm
Forum: Naming
Topic: Ch. 17 Problem 29a [ENDORSED]
Replies: 4
Views: 233

Re: Ch. 17 Problem 29a [ENDORSED]

Why do you change iron to ferrate?
by Kayla Ikemiya 1E
Thu Nov 16, 2017 2:12 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Chapter 4 19b
Replies: 1
Views: 110

Chapter 4 19b

How do you know that the shape of (CH3)2Be is tetrahedral? I got that the central atom was Be and it had 4 regions of e- density but 2/4 regions were electron pairs.
by Kayla Ikemiya 1E
Sun Nov 12, 2017 7:39 pm
Forum: Lewis Structures
Topic: Midterm Question CH3SH
Replies: 5
Views: 304

Re: Midterm Question CH3SH

I got that 3 Hydrogens are bonded to Carbon and Carbon also shares a single bond with Sulfur. Sulfur has 2 sets of lone pairs. Hydrogen is bonded to Sulfur. Carbon is the least electronegative, so it is the central atom. With this configuration the formal charge for each element is 0.
by Kayla Ikemiya 1E
Sun Nov 12, 2017 7:30 pm
Forum: Ionic & Covalent Bonds
Topic: Midterm
Replies: 6
Views: 415

Re: Midterm

I got:
KCl is ionic
N2 is non polar because the structure equally shares the electrons because the same element has the same electronegativity value
SiO2 is polar
by Kayla Ikemiya 1E
Mon Oct 30, 2017 5:22 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 2.53 [ENDORSED]
Replies: 4
Views: 260

2.53 [ENDORSED]

Why does Ge only have one unpaired electron? Shouldn't it be 3 unpaired electrons because it's 4p2?
by Kayla Ikemiya 1E
Mon Oct 30, 2017 5:13 pm
Forum: Quantum Numbers and The H-Atom
Topic: Question 2.19 b.
Replies: 5
Views: 248

Re: Question 2.19 b.

For 3p, you know that n=3 and the fact that it's in the p-orbital indicates that l=1. Therefore, there are 3 values for ml. 1,0,-1.
by Kayla Ikemiya 1E
Mon Oct 30, 2017 5:09 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Ground state vs. Excited State
Replies: 2
Views: 226

Ground state vs. Excited State

How do you differentiate whether the electron is in the excited state or the ground state?
by Kayla Ikemiya 1E
Wed Oct 25, 2017 10:00 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: 2.1 part d
Replies: 4
Views: 190

2.1 part d

How do we know that the radius of the atom increases as an electron goes from n=1 to n=2? Is it because the electron is moving further away from the nucleus?
by Kayla Ikemiya 1E
Sun Oct 22, 2017 7:42 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Test 3 [ENDORSED]
Replies: 5
Views: 369

Re: Test 3 [ENDORSED]

What sections of what chapter does test 3 cover?
by Kayla Ikemiya 1E
Sun Oct 22, 2017 5:56 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Test 2
Replies: 5
Views: 366

Re: Test 2

When do we get test 2 back?
by Kayla Ikemiya 1E
Sun Oct 15, 2017 1:02 pm
Forum: Properties of Light
Topic: Speed of Light Constant
Replies: 18
Views: 713

I don't know how to post my own topic

Can someone please explain how to start a new topic on this please? I also don't understand 30 C on the post module for Photoelectric effect
by Kayla Ikemiya 1E
Sun Oct 15, 2017 12:55 pm
Forum: Properties of Light
Topic: Photons
Replies: 7
Views: 337

Photoelectric effect Module

How do you do 29 B?
by Kayla Ikemiya 1E
Thu Oct 05, 2017 12:47 am
Forum: Molarity, Solutions, Dilutions
Topic: G11
Replies: 2
Views: 190

Re: G11

convert mmol to moles. Rearrange the equation M= n/v to V=n/m.
by Kayla Ikemiya 1E
Thu Oct 05, 2017 12:45 am
Forum: Limiting Reactant Calculations
Topic: L #39
Replies: 4
Views: 240

L #39

why do you use O instead of O2 for this problem?

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