//www.walnuths.net/apps/classes/494964/assignments/ Class Name: Honors Chemistry Per. 6 Instructor(s): Garrett Lim Location: C-8 en-us SchoolSitePro //www.walnuths.net/homeworkItem3080476 //www.walnuths.net/apps/classes/494964/assignments/
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Answers:

#6: 4H+, 1, 2 --> 1, 2, 2H2O
#7: 4H+, 2, 1 --> 1, 1, 2H2O
#8: 16H+, 2, 10 --> 2, 5, 8H2O
#9: 14H+, 6, 1 --> 6, 2, 7H2O
#10: 8H+, 3, 2 --> 3, 2, 4H2O

I just noticed that there are no basic problems on your worksheet so I suggest, for practice, that you work out all of the problems as basic problems as well (you can do that.  just add a couple of steps beyond what you would do for an acidic problem).  Here are the answers if you were to do them as basic equations (Coefficients of the original equation listed. If not in the original equation, like H2O or H+ or OH-, it will be written out):

#6: 2H2O, 1, 2 --> 1, 2, 4OH-
#7: 2H2O, 2, 1 --> 1, 1, 4OH-
#8: 8H2O, 2, 10 --> 2, 5, 16OH-
#9: 7H2O, 6, 1 --> 6, 2, 14OH-
#10: 4H2O, 3, 2 --> 3, 2, 8OH-

Optional Worksheet below for more practice.

Worksheet (big font) Answers:

#1: 6H+, 2, 5 --> 2, 5, 3H2O
#2: 2H+, 1, 2 --> 2, 1 (no additional H2O needed since it's already in the equation!!!)
#3: 2OH-, 1, 1 --> 1, 2, 1H2O
#4: 2OH-, 2, 3 --> 2, 3, 1H2O

Last Quiz!!!
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Optional practice problems:

Keq expression practice: p. 883 Ch. 18 #1-6
Keq calculation practice: p. 883 #7-9
Ka expression practice: p. 884 #7-10 (for #8, there is a typo. It is supposed to be a subscript 3, not superscript)
pH practice: p. 884 #11-19
Ka practice: p. 616 #23ab, p. 632 #91, 92, p. 884 #21

Optional practice problems selected answers:

p. 883
7: 66.9
8: 0.0665
9a: 0.135M
9b: 0.948M

p. 884
11: acidic
12: acidic
13: 3.35
14: pH=11.94, pOH=2.06
15: pH=5.57, pOH=8.43
16: 0.0012M
17: 0.36M
18: 3.17
19: 9.53

Ka stuff:
p. 616
23a: 0.0054
23b: 0.011
p. 632
91: 0.0069
92: 0.0014
p. 884
20: 2.2x10^ -9
21: 1.4 x 10^ -5
]]> Mon, 13 May 2013 22:05:59 PDT //www.walnuths.net/homeworkItem3072873 //www.walnuths.net/apps/classes/494964/assignments/ p. 640 #1-3, p. 642 #4, 5 (write down the oxidation number for ALL elements in the compounds), p. 643 #8, 9
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Study Guide Due

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AND write the dissociation equation, constant expression AND ICE chart for the following:

a. 0.350M HNO2
b. 0.350M H2SO3
c. 0.350M NH3
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