Download Solubility MC

Teacher’s Tools® Chemistry
Solubility Equilibrium: Worksheet 1
1.
How many milliliters of 0.20 M AlCl3 solution would be necessary to precipitate all of the Ag+ from 45 mL of a 0.20 M
AgNO3 solution?
(A) 15 mL
2.
3.
AlCl3(aq) + 3AgNO3(aq) -----> Al(NO3)3(aq) + 3AgCl(s)
(B) 30 mL
(C) 45 mL
(D) 60 mL
Which of the following salts has the greatest molar solubility in pure water?
(A) CaCO3
(Ksp = 8.7 x 10-9)
(B) CuS
(Ksp = 8.5 x 10-45)
(C) Ag2CO3
(Ksp = 6.2 x 10-12)
(D) Pb(IO3)2
(K sp = 2.6 x 10-13)
The solubility product of CaF2 is 4.3 x 10-11. What is the molar solubility of CaF2 in a 0.050 M solution of Ca(NO 3)2?
(A) 2.2 x 10-4 M
(B) 1.0 x 10-5 M
(C) 1.5 x 10-5 M
(D) 8.4 x 10-10 M
4.
Silver oxalate Ag2(C2O4) is dissolved in pure water. The concentration of Ag+ ion in a saturated solution is
2.2 x 10-4 M. What is the Ksp of Ag2(C2O4)?
(A) 5.3 x 10-12
(B) 1.1 x 10-12
(C) 5.0 x 10-8
(D) 2.4 x 10-8
(E) 2.2 x 10-4
5.
What weight of silver chromate (Ag2CrO4) will dissolve in 1.0 liter of a solution that is 0.010 M in Ag+?
Ksp Ag2CrO4 = 1.9 x 10-12 and Molar Mass of Ag2CrO4 = 332 g/mol.
(A) 1.9 x 10-12 g
(B) 1.9 x 10-8 g
(C) 1.4 x 10-6 g
(D) 6.3 x 10-6 g
(E) 4.7 x 10-4 g
6.
The solubility of CaF2 in 1 x 10-3 M KF
(A) is equal to the solubility of CaF2 in pure water.
(B) is less than the solubility of CaF2 in pure water.
(C) is greater than the solubility of CaF2 in pure water.
Copyright 2005-PTAS, Inc.
1
0105ws03.pdf
Teacher’s Tools® Chemistry
Solubility Equilibrium: Worksheet 1
7.
A solution has the following concentrations:
[Cl-] = 1.5 x 10-1 M
[Br-] = 5.0 x 10-4 M
[CrO42-] = 1.9 x 10-2 M
A solution of AgNO3 (100% dissociated) is added to the above solution, drop by drop. Which silver salt will precipitate first?
Ksp AgCl = 1.5 x 10-10
Ksp AgBr = 5.0 x 10-13
Ksp Ag2CrO4 = 1.9 x 10-12
(A) AgCl
(B) AgBr
(C) Ag2CrO4
(D) AgCl and AgBr together
(E) None of the above
8.
Suppose that CaF2 is to be used as a fluoridation agent in a municipal water system. What is the [F-] if extremely hard water
([Ca2+] = 0.070 M) is saturated with CaF2? (Ksp CaF2 = 1.7 x 10-10)
(A) 1.3 x 10-5 M
(B) 2.5 x 10-5 M
(C) 5.0 x 10-5 M
(D) 1.0 x 10-4 M
(E) 0.070 M
9.
Which of the following salts is most soluble in water?
(A) Mg(OH)2
(B) CaS
(C) (NH4)2CO3
(D) PbCl2
10. A 2.00 g sample of a compound requires 268.0 mL of 0.100 M AgNO 3 to precipitate all of the chloride ion in the
compound. What is the percent of Cl- in the compound? (AM of Cl = 35.45)
(A) 47.6%
(B) 95.1%
(C) 23.8 %
(D) 4.75 %
11. Which salt is the least soluble in water?
(A) Hg CrO
(Ksp = 2.0 x 10-9)
2
4
(B) BaF2
(C) CaF2
(D) AgOH
(E) BaCO3
Copyright 2005-PTAS, Inc.
(Ksp = 1.7 x 10-6)
(Ksp = 4.0 x 10-11)
(Ksp = 1.5 x 10-8)
(Ksp = 8.0 x 10-9)
2
0105ws03.pdf