Let the blood bath begin...Point mongering at its finest!
2/28/2007
Note: These answers for the penance are not guaranteed, they are the
result of students' efforts. If you are first
to contact the instructor with a right answer or find a mistake on
this key, you will get extra credit for that
problem. First wrong answers do not count, only first right answers
count toward the maximum 5 extra credit
points. In any event, to get back all equilibrium points missed
on Exam 1, you will need to complete all
penance problems correctly, make test corrections, and show the instructor
that you understand equilibrium by
explaining 3 randomly chosen problems to the instructor. More answers
will appear as more people do the
problems.
Note: Bold answers are confirmed correct.
1 1.78 Heather Graehl
1.59 Harvinder Grewal 1.6 (2-sig. figs.) Michael Foulks
2 8.58
Heather Graehl 8.6 (2-sig. figs.)
Michael Foulks
3 .291 Heather Graehl
.293 Harvinder Grewal .29
Lori Hartman
4
1.94
Heather Graehl 1.18 Harvinder
Grewal 1.2 (2-sig. figs.) Michael Foulks
5 5.89 Heather Graehl
7.85 Harvinder Grewal
7.8 (2-sig. figs.) Michael Foulks
6
2.52
Heather Graehl 5.1 Oboli Gurara
7
13.5 Heather Graehl
13.2 Oboli Gurara
8
12.5 Heather Graehl
4.3 Oboli Gurara
9
.875 Heather Graehl 1.48
Oboli Gurara
10
12.7 Heather Graehl
9.21 Oboli Gurara 9.2 Miguel Cobian
11
12 Heather Graehl
12 9.2
(2-sig.
figs.) Michael Foulks
13 5.23 Heather Graehl
.523 Oboli Gurara
14 5.6 Oboli Gurara
15
[H+]=0.0847, [H2PO4-]=0.846, [HPO4-2]=7.31x10-5,
[PO4-3]=5.54x10-9 Heather Graehl
[H+]=0.0812, [H2PO4-]=0.0812, [HPO4-2]=6.30x10-8,
[PO4-3]=3.26x10-19
Harvinder Grewal
[H+]=0.085, [H2PO4-]=0.085, [HPO4-2]=6.3x10-8,
[PO4-3]=3.1x10-19
Oboli Gurara
[H+]=0.081M, [H2PO4-]=0.081M, [HPO4-2]=6.3x10-8M,
[PO4-3]=3.3x10-19
M Michael Foulks
16
Molar
solubility of AgCl = 1.3x10-5 M and molar solubility of
Ag2CrO4
= 1.4x10-4 M.
Michael Foulks Ag2CrO4
= 8.7x10-5 M Miguel Cobian
Heather Graehl [Ag2CrO4]=6.5x10-5 ,[AgCl
]= 1.33x10-5 M therefore
Ag2CrO4 is more soluble. Eat dirt!
17 Ksp= 16.4 Keeley Mircetic
18 85 grams AgNO3 Miguel Cobian
19 pH
= 5.4 Keeley Mircetic pH=3 Teresa Rapp
20
3x10-4M Teresa Rapp
21
.10 moles Teresa Rapp
22 11 moles NaCl Miguel Cobian
23
6x101 grams ZnCl2 Teresa Rapp
5x101 Harvinder Grewal
24 3.1 mole NH3 Teresa Rapp
25 [Cl-]=.0058,
[NH3]= 3.0, [Ag+]=1.1x10-10 Keeley Mircetic
[Cl-]=.017, [Ag+]=1.2x10-10 Teresa Rapp
[NH3]= 2.98, Lori Hartman