Multiple Choice
Identify the choice that best completes the statement or answers
the question.
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1.
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The Ksp of Bi2S3
is 1.6 x 10-72. What is the molar solubility of this compound in aqueous
solution?
a. | 1.6 x 10-72 M | c. | 1.7 x 10-15 M | b. | 4.4 x
10-15 M | d. | 1.2 x 10-24
M |
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2.
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Which is an INCORRECT match?
a. | BaSO4 = x-ray imaging | c. | Ca3(PO4)2 = bones and
teeth | b. | CaCO3 = limestone | d. | all are correct
matches |
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3.
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The mineral fluorite is composed of
CaF2. The molar solubility of calcium fluoride in water is 2.1 x 10-4 moles/L.
What is the Ksp of CaF2?
a. | 3.7 x 10-11 | c. | 4.6 x 10-8 | b. | 2.14 x
10-4 | d. | 9.8 x
10-12 |
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4.
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Gold chloride, AuCl, has a Ksp of 2.0 x
10-13. How many grams of gold are found in 500 mL of a saturated aqueous solution of
AuCl?
a. | 1.0 x 10-13 g | c. | 2.2 x 10-7 g | b. | 4.5 x
10-7 g | d. | 4.4 x 10-5
g |
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5.
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A 1.000 L solution is prepared in which
Au+, Ag+, and Cu+ ions are present in solution as nitrates, all at a
concentration of 0.0010 M. A solution of sodium chloride is slowly added. Which compound will begin
to precipitate first? The Ksp of AuCl = 2.0 x 10-13; AgCl = 1.8 x
10-10; CuCl = 1.9 x 10-7.
a. | CuCl | b. | AgCl | c. | AuCl | d. | NaNO3 | e. | NaCl |
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6.
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A 1.000 L solution is prepared in which
Au+, Ag+, and Cu+ ions are present in solution as nitrates, all at a
concentration of 0.0010 M. A solution of sodium chloride is slowly added. The Ksp of AuCl
= 2.0 x 10-13; AgCl = 1.8 x 10-10; CuCl = 1.9 x 10-7. At what
concentration (M) of [Cl-] ions will precipitation of the first salt
begin?
a. | 2.0 x 10-13 M | c. | 4.5 x
10-7 M | b. | 2.0 x 10-10 M | d. | 1.9 x 10-4
M |
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7.
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The Ksp of bismuth iodide,
BiI3, is 8.1 x 10-19. How many grams of this compound can dissolve in a Liter
of aqueous solution?
BiI3(s) « Bi3+ + 3 I-
a. | 4.8 x 10-16 g | b. | 8.1 x 10-19 g | c. | 1.3 x
10-5 g | d. | 3.0 x
10-20 g | e. | 7.8 x
10-3 g |
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8.
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The mineral sphalerite found in zinc mines near
Lebanon, Tennessee is composed of ZnS. The molar solubility of ZnS in water is 3.3 x 10-11
moles/L. What is the Ksp of ZnS?
a. | 2.14 x 10-4 | c. | 5.7 x 10-6 | b. | 1.1 x
10-21 | d. | 3.3 x
10-11 |
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9.
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Nickel carbonate, NiCO3, has a
Ksp of 6.6 x 10-9. What is the molar solubility of nickel
carbonate?
a. | 3.9 x 10-3 mol/L | c. | 6.6 x 10-9 mol/L | b. | 4.35 x 10-17 mol/L | d. | 8.1 x
10-5 mol/L |
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10.
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A 1.000 L solution is prepared in which
Ni2+, Ag+, and Mn2+ ions are present in solution, all at a
concentration of 0.0010 M. A solution of sodium sulfide Na2S is slowly added. Which
compound will begin to precipitate FIRST? The Ksp of NiS = 3.0 x 10-21;
Ag2S = 1.0 x 10-49; MnS = 5.1 x 10-15.
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11.
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In Problem #10, at what concentration
[S2-] will precipitation of the first salt begin?
a. | 0.001 M | c. | 5.1 x
10-12 M | b. | 3.0 x
10-18 M | d. | 1.0 x 10-43
M |
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