CHEMISTRY 31

Fall, 2013 - Dixon

Homework Set 1 (for Exam 1)

 

Note: Text problems will not be collected but there will be a 10 point quiz on the homework completion date unless otherwise specified

 

Chapter Problems Date to finish

Set 1.1 Feb. 5

Ch. 1 1a, 5, 11, 13, 15, 20, 24,

32, 35, 37, 42, 46

Ch. 3 1, 2, 5a-d, 11

text solutions

Turn in corrected diagnostic quiz by Feb. 5 (10 points). No Additional Problem 1.1

Set 1.2 Feb. 19

Ch. 3 14, 16a-f

Ch. 4 4, 9, 11, 20, 21, 30

Ch. 6 4, 6 [these will be postponed to set 1.3]

text solutions

 

Additional Problem 1.2

The concentrations of a sugar, which we will abbreviate LG, was detected in smoke from a forest fire using two different methods (values for 7 samples given below). Determine if there is a statistically significant difference in the two measurement techniques. If there may be a reason to justify eliminating one sample from the set of data, you may do so if it is based on a statistical test.

LG concentrations in ng/m3.

Sample #

1

2

3

4

5

6

7

Method A

5789

860

2394

3523

1467

2233

1957

Method B

6091

2409

2976

4172

1726

2133

2560

Additional Problem solutions

 

Set 1.3 Mar. 3 (no quiz)

Ch. 6 8, 15-17, 19, 21, 23, 24, 33, 36, 43, 48

text solutions

Additional Problem 1.3

The following chemical reaction (below) has a DG value = -48.2 kJ/mol (at 25C). (10 pts)

Hg2+ + 2C2H3O2-Hg(C2H3O2)2 (aq)

a) Determine K for the above reaction

b) Using the Ka for the loss of H+ from acetic acid (C2H3O2H) given in the appendix, determine the K for: Hg2+ + 2C2H3O2H ↔ Hg(C2H3O2)2 (aq) + 2H+

c) If 100 mL of solution containing the above reactants is diluted with 100 mL of water, in which direction would the reaction shift? Explain your answer.

Additional Problem solutions