Multiple Choice Chemistry Quiz Template With Answers -Prof. Dan Schwartz Page 5
ADVERTISEMENT
1
2
3
4
5
619. (5 points) In the following reaction, the ammonia acts as a
BF
+ NH
BF
–NH
3
3
3
3
(a) Lewis acid
(b) Lewis base
(c) Bronsted-Lowry acid
(d) Bronsted-Lowry base
20. (5 points) Calculate the pH of an aqueous solution of pyridine with a hydroxide ion concentration of
–4
2.15 x 10
M.
–11
–4
(a) 4.65 x 10
(b) 2.15 x 10
(c) 3.67
(d) 10.33
21. (5 points) What statement is most consistent for an acid with a pH = 3?
(a) one one-hundredth as strong as an acid with a pH of 5.
(b) half as strong as an acid with a pH of 5.
(c) twice as strong as an acid with a pH of 5.
(d) one hundred times as strong as an acid with a pH of 5.
22. (5 points) What is the pH of a solution made by mixing 100.0 mL of 0.10 M HNO
, 50.0 mL of 0.20
3
M HCl, and 100.0 mL of water? Assume that the volumes are additive.
(a) 0.30
(b) 0.82
(c) 1.00
(d) 1.10
23. (5 points) Determine the acid dissociation constant for a 0.010 M nitrous acid solution that has a pH
of 2.70. Nitrous acid is a weak monoprotic acid and the equilibrium equation of interest is
+
–
HNO
(aq) + H
O (l)
H
O
(aq) + NO
(aq)
2
2
3
2
–3
–3
–4
–4
(a) 8.0 x 10
(b) 2.0 x 10
(c) 5.0 x 10
(d) 4.0 x 10
24. (5 points) What is the pH of a 0.100 M KBrO solution if the K
for hypobromous acid (HBrO) is
a
–9
2.0 x 10
?
(a) 3.15
(b) 4.85
(c) 9.15
(d) 10.85
25. (5 EXTRA CREDIT points) Drinking too much water can be toxic, resulting in a condition called
hyponatremia. According to your instructor this is due to the phenomenon known as
(a) Le Chatelier’s principle
(b) osmotic pressure
(c) Raoult’s Law
(d) freezing point depression
Exam #3
Page 5
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Life