100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
CHEM 102 Winter 18 Make-up Exam (B) Questions and Answers,100% CORRECT $15.49   Add to cart
Quickly navigate to
Preview
  2.  
  3. CHEM 102
  4.  
  5. CHEM 102

Exam (elaborations)

CHEM 102 Winter 18 Make-up Exam (B) Questions and Answers,100% CORRECT
 2 views  0 purchase
  • Course
  • CHEM 102
  • Institution
  • CHEM 102

CHEM 102 Winter 18 Make-up Exam (B) Questions and Answers Potentially useful data: x  pH  pKa 2 a  log base acid  ΔG° = ΔH° – T ΔS° ΔG = ΔG° + RT ln Q ΔG° = – RT ln K R = 8.314 J mol-1 K-1 1. Please choose the letter “B” as y...

[Show more]

Preview 2 out of 9  pages

Document information

  • February 22, 2023
  • 9
  • 2022/2023
  • Exam (elaborations)
  • Questions & answers

Subjects

  • chem 102 winter 18 make up exam b questions and answers

Written for

  • CHEM 102
All documents for this subject (44)

Seller

avatar-seller
paulhans

Reviews received

Content preview

CHEM 102 Winter 18 Make-up Exam (B) Questions and Answers


Potentially useful data:


x  b b 2  4 ac
2a
pH  base

pKa log
acid 
ΔG° = ΔH° – T ΔS°
ΔG = ΔG° + RT ln
Q ΔG° = – RT ln K
-1 -1
R = 8.314 J mol K


1. Please choose the letter “B” as your answer for this question.


2. Which of the following reactions has a negative S°?
a) 2 H2 (g) + O2 (g)  2 H2O (g)
b) BaF2 (s)  Ba2+ (aq) + 2 F (aq)
c) CH3OH (aq)  CH3OH (l)
d) All of the above.
e) Both a) and c).

3. Rank the following substances in order of decreasing (that is, from highest to lowest) standard molar entropy.
N2O4(g) NO(g) NO2(g)
a) N2O4(g) > NO(g) > NO2(g)
b) NO(g) > NO2(g) > N2O4(g)
c) N2O4(g) > NO2(g) > NO(g)
d) NO (g) > N2O4(g) > NO2(g)
e) Since they are all gases, all have the same entropy.




Page 1 of 7

, 4. Under which conditions is a chemical reaction non-spontaneous at all temperatures?
a) S° > 0, H° > 0
b) S° < 0, H° > 0
c) S° < 0, H° < 0
d) S° > 0, H° < 0
e) Such a reaction does not exist.


-
5. Which of the following MUST be true in a buffer solution in which [A ] > [HA]?
a) pH > pKa
b) pH = pKa
c) pH < pKa
d) pH < 7.00
e) pH > 7.00


6. Which equation could be used to calculate the molar solubility, S, of Fe(OH)2?
2
a) Ksp = 2 S
2
b) Ksp = S
3
c) Ksp = S
3
d) Ksp = 4 S
3
e) Ksp = 2 S

-10
7. Calculate the pH of a solution made by mixing 250.0 mL of 0.150 M NH4Cl (Ka = 5.6 × 10 )
with 100.0 mL of 0.200 M NH3.

a) 9.13
b) 8.98
c) 9.53
d) 4.74
e) 9.25




Page 2 of 7

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller paulhans. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $15.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

75057 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$15.49
  • (0)
  Add to cart