CHEMISTRY 31

Spring, 2014 - Dixon

Homework Set 2

 

Chapter                                       Problems                                             Date to finish    

Set 2.1                                                                                                          Mar. 19

Ch. 6                                              33, 36, 43, 48

Ch. 7                                              1, 3, 4, 9, 12, 19, 21, 23 (postponed to set 2.2)

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Additional Problem 2.1. 

Using the Ksp value for Ba(IO3) 2 in the appendices, determine the solubility of Ba(IO3) 2. in a) water and in b) 0.050 M NaNO3.  For this problem, you do not need to consider secondary reactions (e.g. Ba2+ + OH-), but you do need to consider effects of ionic strength.  For part a) you will need to use an iterative approach to solve this problem.   (5 pts)

solutions

 

Set 2.2                                                                                                          Apr. 9

Ch. 7                                              12, 19, 21, 23, 27, 28a, b

Ch. 8                                              3

Ch. 17                                            1, 3, 4, 11, 16 (postponed to set 2.3)

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Additional Problem 2.2

Follow the first 5 steps systematic method in the problem below.  You do not need to do step 6. 

Determine the concentration of all species that form when Mg(NO3)2 and CH3CO2H are combined so that the “initial” concentrations are 0.0180 M and 0.0080 M, respectively.  Consider all possible reactions except reactions of conjugate bases of strong acids with water and complex ion formation for which equilibrium constants are less than 10 (see Appendices I and J for formation constants in a log form).  For this problem, you can ignore the effects of ionic strength.  (5 pts)

solutions

 

Set 2.3                                                                                                          Apr. 16 (no quiz)

Chapter 17                                     11,16

Ch. 22                                            7a, 17, 19, 22, 28a-f, 30, 38

Ch. 8                                              6, 8, 11, 19, 21 (postponed to set 3.1)

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No Additional Problem