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What is the solubility in moles/liter for calcium sulfate at 25 oC given a Ksp value...

What is the solubility in moles/liter for calcium sulfate at 25 oC given a Ksp value of 2.4 x 10-5

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Answer #1

Ksp = 2.4 x 10^-5

CaSO4 <--------------> Ca+2 + SO4-2

                                   S             S

Ksp = [Ca+2] [SO4-2]

2.4 x 10-5   = S x S

S = solubility = 4.90 x 10^-3 M

solubility = 4.90 x 10^-3 mol / Litre

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