For each of the salts on the left, match the salts on the right that can be comp

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.

calcium sulfate

lead hydroxide

Ksp =

Ksp =

1. calcium sulfate [_________]                        A. Ag2SO3 2. lead hydroxide [_________]       B. AgOH C. BaCrO4 D. CuCO3

Explanation / Answer

1)

Calcium sulfate = BCD

2)

lead hydroxide = A

b)

CaSO4 --------> Ca+2   +   SO42-

Ksp = [Ca+2][SO42-]

Calcium sulfate : Ksp = S2

lead hydroxide : Ksp = 4S3

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