Write the Ksp expression for the sparingly soluble compound calcium phosphate, Ca3 (PO4) 2.

Question

Violet Coleman

Chemistry

4 March, 08:21

Write the Ksp expression for the sparingly soluble compound calcium phosphate, Ca3 (PO4) 2.

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Answers (1)

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Alonso Barnett · Answer 1

Ksp = 1.3 x 10^ (-32) = (3s) ^ (3) x (2s) ^ (2)

= 27s^ (3) x 4s^ (2) = 108s^ (5)

Explanation:

Ca3 (PO4) 2 (s) 3Ca^ (2+) (aq) + 2PO4^ (3-) (aq)

[Ca^ (2+) ] = 3 [Ca3 (PO4) 2] = 3s

[PO4^ (3-) ] = 2 [Ca3 (PO4) 2] = 2s

Ksp = 1.3 x 10^ (-32) = [Ca^ (2+) ]^ (3) * [PO4^ (3-) ]^ (2)

Ksp = 1.3 x 10^ (-32) = (3s) ^ (3) x (2s) ^ (2)

= 27s^ (3) x 4s^ (2) = 108s^ (5)