- #1

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Many places state that Ksp=[Ca][2F]^2; Ksp=[x]*[2x]^2.

I thought the coefficient go into Ksp equation as an exponent. So, Ksp=[Ca][F]^2.

Can anyone explain which is correct, or why [2F]^2 (if that's the correct one)?

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- Thread starter staka
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- #1

- 23

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Many places state that Ksp=[Ca][2F]^2; Ksp=[x]*[2x]^2.

I thought the coefficient go into Ksp equation as an exponent. So, Ksp=[Ca][F]^2.

Can anyone explain which is correct, or why [2F]^2 (if that's the correct one)?

- #2

Borek

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Many places state that Ksp=[Ca][2F]^2

That's wrong. Are you sure you are not misreading:

Ksp=[x]*[2x]^2.

which is correct - assuming x is molar solubility of CaF

Ksp=[Ca][F]^2.

That's correct.

- #3

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Why do we get Ksp=[x]*[2x]^2?

(Ksp=[Ca][2F]^2 is from this.. misread wrong)

(Ksp=[Ca][2F]^2 is from this.. misread wrong)

- #4

Borek

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