42. Cadmium sulfide, CdS, is an insoluble substance with a Ksp of 1.0 X 10º. It dissociates in water according to the following equation: Cds (s) = Cd?+ (aq) + S2 (aq) %3D What is the concentration of the Cd2+ jon in a saturated solution of CdS? A) 1.0 X 1028 B) 1.0 X 10-21 C) 1.0 X 1014 D) 1.0 X 107
42. Cadmium sulfide, CdS, is an insoluble substance with a Ksp of 1.0 X 10º. It dissociates in water according to the following equation: Cds (s) = Cd?+ (aq) + S2 (aq) %3D What is the concentration of the Cd2+ jon in a saturated solution of CdS? A) 1.0 X 1028 B) 1.0 X 10-21 C) 1.0 X 1014 D) 1.0 X 107
Chemistry
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
Transcribed Image Text:42. Cadmium sulfide, CdS, is an insoluble substance with a Ksp of 1.0 X 10". It
dissociates in water according to the following equation:
CdS (s) = Cd2+ (ag) + S2- (aq)
What is the concentration of the Cd2+ jon in a saturated solution of CdS?
A) 1.0 X 1028
B) 1.0 X 10-21
C) 1.0 X 1014
D) 1.0 X 107
43. BaF2 is very slightly soluble in water with a Ksp = 2.4 X 10$. Which of the
following statements is correct?
A) BaF2 would be less soluble in 0.10 M NaF than in water.
B) BaF2 would have the same solubility in 0.10 M NaF and in water.
C) BaF2 would be more soluble in 0.10 M NaF than in water.
D) There is no way to compare the solubility of BaF2 in water and in 0.10 M NaF.
44. If the reaction A+ B = C has an equilibrium constant greater than 1, which of
the following statements is correct concerning the forward reaction?
A) The forward reaction is not thermodynamically favored and would be
considered non-spontaneous.
B) The forward reaction rate is fast.
C) The forward reaction is slow.
D) The forward reaction is thermodynamically favored and would be considered
spontaneous.
![39. You make a buffer which is 0.50 molar in HE and 0.20 M in the F ion. What is
the pH of the buffer? The Ka of HF is 6.4 X 104.
A) 3.19
B) 0.30
C) 2.50
D) 2.80
40. You mix 50.0 mL of 0.10 M HCI with 40.0 mL of 0.10 M NaOH. What do you
know about the final mixture?
A) It will be acidic and have a pH <7.
B) It will be basic and have a pH < 7.
C) It will be acidic and have a pH > 7.
D) It will be acidic and have pH > 7.
41. Bismuth sulfide, BizS3, is an insoluble compound. It dissociates in water
following the equation:
BizS3 (s) = 2 Bi3+ (aq) + 3 S2 (aq)
What is the expression for the Ksp of this substance?
[Bi3+]?[S?-]3
A) ksp
[BizS3]
B) ksp = [Bi3+]³[S²-1?
%3D
C) ksp = [Bi³+]²[S²-13
%3D
D) ksp = [Bi³+][S²-)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc14b7619-7f42-456d-bd15-e2d5f2d4f203%2F34e5b4ea-4e4d-4987-adcc-8eb8c664fa32%2Fz9zgedo_processed.jpeg&w=3840&q=75)
Transcribed Image Text:39. You make a buffer which is 0.50 molar in HE and 0.20 M in the F ion. What is
the pH of the buffer? The Ka of HF is 6.4 X 104.
A) 3.19
B) 0.30
C) 2.50
D) 2.80
40. You mix 50.0 mL of 0.10 M HCI with 40.0 mL of 0.10 M NaOH. What do you
know about the final mixture?
A) It will be acidic and have a pH <7.
B) It will be basic and have a pH < 7.
C) It will be acidic and have a pH > 7.
D) It will be acidic and have pH > 7.
41. Bismuth sulfide, BizS3, is an insoluble compound. It dissociates in water
following the equation:
BizS3 (s) = 2 Bi3+ (aq) + 3 S2 (aq)
What is the expression for the Ksp of this substance?
[Bi3+]?[S?-]3
A) ksp
[BizS3]
B) ksp = [Bi3+]³[S²-1?
%3D
C) ksp = [Bi³+]²[S²-13
%3D
D) ksp = [Bi³+][S²-)
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