College Chemistry Ii Phs 1035 Practice Exam 3 With Answer Key Page 24
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39Indicator
pK a
methyl orange
3.46
methyl red
5.00
bromocresol purple
6.12
bromthymol blue
7.10
thymol blue
8.90
phenolpthalein
9.10
157) A 25.0 mL sample of a solution of a monoprotic acid is titrated with a 0.115 M NaOH solution. The
157)
titration curve above was obtained. Which of the following indicators would be best for this
titration?
A) methyl red
B) bromthymol blue
C) thymol blue
D) phenolpthalein
E) bromocresol purple
Consider the following table of K sp values.
Name
Formula
K sp
5.2 × 10 -12
Cadmium carbonate
CdCO 3
2.5 × 10 -14
Cadmium hydroxide
Cd(OH) 2
3.9 × 10 -11
Calcium fluoride
CaF 2
8.3 × 10 -17
Silver iodide
AgI
1.4 × 10 -11
Zinc carbonate
ZnCO 3
158) Which compound listed below has the greatest molar solubility in water?
158)
A) CdCO 3
B) Cd(OH) 2
C) AgI
D) CaF 2
E) ZnCO 3
159) Which compound listed below has the smallest molar solubility in water?
159)
A) ZnCO 3
B) Cd(OH) 2
C) CdCO 3
D) AgI
E) CaF 2
160) The molar solubility of ________ is not affected by the pH of the solution.
160)
A) Na 3 PO 4
B) NaF
C) KNO 3
D) AlCl 3
E) MnS
161) In which one of the following solutions is silver chloride the most soluble?
161)
A) 0.181 M HCl
B) 0.0176 M NH 3
C) 0.744 M LiNO 3
D) pure water
E) 0.181 M NaCl
162) Which one of the following is not amphoteric?
162)
A) Al(OH) 3
B) Ca(OH) 2
C) Cr(OH) 3
D) Zn(OH) 2
E) Sn(OH) 2
24
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