CHEMISTRY COMMUNITY

Angela_Kim_1N

When using the Nernst Equation, how do I know whether to use
E(cell)=E(cell)0 - RT/nF lnQ
or
E(cell)=E(cell)0 - 0.05916/n log Q?
In the practice finals in the back of the course reader, some problems use the first equation while others use the second.
Do they give the same result?

Thank you!

Angela_Kim_1N

Name the compound shown below. ..........................................CH(CH3)2 .............................................I CH3 CH2 CH2 CH2 CH2 CH2 CH CH2 CH2 CH3 (ignore the periods) The answer for this problem is 4-isopropyldecane or 4-(1-methylethyl) decane but I don't understand how to come...

Angela_Kim_1N

I think this is the video that was recorded during the review session!

viewtopic.php?f=160&t=20107

Angela_Kim_1N

I am also not understanding this part of the problem. The solution manual states that the rate is increased by (3.02/1.25)^2 however I am not seeing how the rate is increased by this amount.

Thank you!

Angela_Kim_1N

How do I know when to add Platinum to a cell diagram?
I thought platinum was added when there were no solids in the equation. However for homework problem 14.13 part b, the cell diagram is
Pt(s) I I^-(aq) I I2(s) II Ce^-4(aq), Ce^3+ (aq) I Pt(s)

Angela_Kim_1N

H^{+}(aq) + Cr_{2}O_{7}^{2-} (aq) + C_{2}H_{5}OH(aq) \rightarrow Cr^{3+}(aq) + C_{2}H_{4}O(aq) + H_{2}O(l) Identify the elements undergoing changes in oxidation state and indicate the initial and final oxidation numbers for these elements. The solutio...

Angela_Kim_1N

A sample of 1 mol of gas initially at 1 atm and 298K is heated at constant pressure to 350K, then the gas is compressed isothermally to its initial volume and finally it is cooled to 298K at constant volume. Which of the following values is zero? -Delta S of surrounding and Delta G -Delta S of syste...

Angela_Kim_1N

question: Oxygen difluoride is a colorless, very poisonous fas that reacts rapidly with water vapor to produce O2, HF, and heat: OF2 + H2O ---> O2 + 2HF delta H = -318kJ What is the change in internal energy for the reaction of 1.00 mol OF2? The solution manual uses 298K as temperature. I was wonder...

Angela_Kim_1N

A piston confines 0.200 mol Ne(g) in 1.20 L at 25 degrees C. Two experiments are performed. (a) The gas is allowed to expand through an additional 1.20 L against a constant pressure of 1.00 atm. (b) The gas is allowed to expand reversibly and isothermally to the same final volume. Which process does...

Angela_Kim_1N

I personally really liked the UA office hours because they are students that have taken this class before. So they tend to know what topics we would struggle in and they explain it in a way that is easy to understand. Also, UA sessions are done in small groups so it was easy to get my questions answ...

Angela_Kim_1N

problem:Find the initial concentration of the weak acid or base in each of the following aqueous solutions: (a) a solution of HClO with pH 4.60 In the solution manual, it says "Let x=nominal concentration of HClO" What is the nominal concentration and why do we use this instead of the ICE ...

Angela_Kim_1N

How does changing temperature affect a reaction?
I know that if a reaction is endothermic then it will favor products and if a reaction is exothermic it favors reactants forming.
But what does that exactly mean?

Thank you!

Angela_Kim_1N

When writing the formula for a complex compound, does the order of the ligands written matter?

Angela_Kim_1N

When drawing the molecular orbital diagram, why do we fill up the pi before the sigma?
For example, in the diagram for N2, pi2p would be filled up before sigma2p.

Angela_Kim_1N

When we write the hybridization of pi bonds, why do we only mention the p orbital?

Angela_Kim_1N

How do I know what molecule/compound has more ionic character than another?

Angela_Kim_1N

If we are writing the electron configuration of an ion such as Cl-, then is it [Ar] or [Ne] 3s2 3p6?

Angela_Kim_1N

What is the wavelength of the radiation emitted when an electron transitions from n = 4 to n=3?
I understand how to solve this question, however how many significant figures should the answer be?

Angela_Kim_1N

Problem: The y-ray photons emitted by the nuclear decay of a technetium-99 atom used in radiopharmaceuticals have an energy of 140.511keV. Calculate the wavelength of these y-rays. The solution manual says that in order to convert eV to Joules we have to multiply the eV by 1.6022*10^-19. I was wonde...

Angela_Kim_1N

I'm in Dogwood and I'm definitely interested!! Let me know if you guys are meeting!

Angela_Kim_1N

For the solution above, is 0.050M necessary to figure out the answer to this problem?

CHEMISTRY COMMUNITY

Search found 21 matches

Nernst Equation

#1 quiz 3 preparation

Re: Friday Review Session Broadcast

Re: Homework Problem 15.19

Adding platinum

Homework 14.1

Quiz 1 prep #9

homework 8.49

Homework 8.9 [ENDORSED]

Re: Most Helpful Resource

12.61

change in temperature

Formula

MO diagram [ENDORSED]

pi bonds

Ionic character

Electron configuration for ions [ENDORSED]

Significant Figures

HW chapter 1 problem 23 [ENDORSED]

Re: De Neve Study Group

Re: Question on G25