Chem 102 - General Chemistry » Winter 2022 » Quiz 4

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Question #1
The solubility of manganese (II) hydroxide (Mn(OH)2) is 2.2x10-5M  What is the Ksp of Mn(OH)2?
A.   4.8 × 10-10
B.   4.3 × 10-14
C.   2.2 × 10-5
D.   1.1 × 10-14
E.   2.1 × 10-14
Question #2
A solution containing Ba(NO3)2 is mixed with a solution of LiF to form a solution that is 0.0070 M in barium ion and 0.0120 M in fluoride ion. What will happen once these solutions are mixed forming the concentrations given above? Ksp(BaF2) = 1.7 × 10-6.
A.   Nothing will happen since Barium fluoride is extremely soluble.
B.   Nothing will happen since both barium nitrate and lithium fluoride are soluble compounds
C.   A precipitate will form since Qsp > Ksp for BaF2
D.   There is not enough information
E.   Nothing will precipitate since Qsp < Ksp 
Question #3
What is the solubility (in M) of PbCl2 in a solution of HCl with a pH of 0.82? The Ksp of PbCl2 is 1.6x10-5.
A.   1.1 × 10-4
B.   1.6 × 10-5
C.   1.8 × 10-4
D.   7.1 × 10-4
E.   2.0 × 10-3
F.   None of the above
Question #4
In which of the following aqueous solutions would you expect CuBr to have the highest solubility?
A.   0.040 M CuNO3
B.   0.030 M NaBr
C.   0.020 M LiBr
D.   0.010 M NaCl
E.   0.0100 M KBr

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