A generic salt, ab2, has a molar mass of 169 g/mol and a solubility of 1.10 g/l at 25 °c. what is the ksp of this salt at 25 °c?

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23-07-2017
Chemistry

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A generic salt, ab2, has a molar mass of 169 g/mol and a solubility of 1.10 g/l at 25 °c. what is the ksp of this salt at 25 °c?

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dec77cat dec77cat · Answer 1 · 2017-07-23T17:42:02+02:00

dec77cat dec77cat

23-07-2017

AB₂(s) ⇄ A²⁺(aq) + 2B⁻(aq)

Ksp=[A²⁺][B⁻]²

a=1.10 g/L
M=169 g/mol

c=a/M

[A²⁺]=c=a/M
[B⁻]=2c=2a/M

Ksp=(a/M)(2a/M)²=4(a/M)³

Ksp=4*(1.10/169)³=1.103×10⁻⁶

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