For each of the salts on the left, match the salts on the right that can be comp
ID: 908471 • Letter: F
Question
For each of the salts on the left, match the salts on the right that can be compared directly, using Ksp values, to estimate solubilities.
(If more than one salt on the right can be directly compared, include all the relevant salts by writing your answer as a string of characters without punctuation, e.g, ABC.)
Write the expression for K in terms of the solubility, s, for each salt, when dissolved in water.
zinc cyanide
manganese(II) sulfide
Ksp =
Ksp =
Note: Multiply out any number and put it first in the Ksp expression. Combine all exponents for s.
1. zinc cyanide A. Pb(OH)2 2. manganese(II) sulfide B. Ag2S C. AlPO4 D. Zn(OH)2Explanation / Answer
1 - A ,B, D
2- C
Zn(CN)2 (s) -----> Zn2+ (aq) + 2CN-(aq)
Ksp = [Zn2+] [CN-]^2 = ( S) ( 2S)^2 = 4S^3 ( for Pb(OH)2 also Ksp = S^2)
MgS(s) ----> Mg2+ (aq) + S2- (aq)
Ksp = [Mg2+] [S2-] = ( S) ( S) = S^2 ( for AlPO4 also Ksp = S^2)
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