CHEMISTRY 31

Fall, 2016 - 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                                                                                                          Sept. 7

Ch. 1                                            1a, 5, 12, 16, 22, 26, 29, 34, 37

Ch. 3                                            1, 2     (postponed to Set 1.3) 

Turn in corrected diagnostic quiz by Sept. 7 (10 points). 

Additional Problem 1.1 (5 pts total).  Phosphoric acid, H3PO4, is available commercially as a mixture that is 87% by weight in water and has a density of 1.73 g/mL.  Determine the following quantities:

a) the molarity of H3PO4 in the solution

b) the molarity of water in the solution

c) the volume (in mL) of this acid needed to add to a 100.0 mL volumetric flask to make a 0.100 M solution

 

Set 1.2                                                                                                          Sept. 21

Ch. 1.37 (moved from set 1.1)

Ch. 3                                             1, 2, 5a-d, 11, 14, 16a-f

Ch. 4                                             1, 3a,b,d, 5a,b, 10, 12, 14, 22

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 8
Method A 5789 860 2694 3523 1467 2233 2157
Method B 6091 2409 2976 4172 1726 2133 2560

 

Set 1.3                                                                                                          Oct. 3

Ch. 4                                             32, 34a

Ch. 6                                             4, 6, 8, 15-17, 19

 

No Additional Problem