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Based on the data from the water analysis below, calculate the reaction quotient for the dissolution...

Based on the data from the water analysis below, calculate the reaction quotient for the dissolution of cobalt(II) phosphate.

[Co2+] = 2.6x10-3 M
[PO43-] = 8.2x10-4 M
Ksp of cobalt(II) phosphate = 2.05x10-7

Q=

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Answer #1

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Cobalt (II) phosphate = Co3(PO4)2

Co3(PO4)2 (s)   ------------> 3 Co2+ (aq) + 2 PO43- (aq)

Q = [ Co2+ ]^3 [PO43-]^2

= (2.6 x 10^-3)^3 (8.2x10^-4)^2

Q = 1.18 x 10^-14

Ksp = 2.05 x 10^-7

reaction quotient Q = 1.18 x 10^-14

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