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The salt Al(OH)(3) involved in the follo...

The salt `Al(OH)_(3)` involved in the following two equilibria.
`Al(OH)_(3)(s)hArrAl^(3+)(aq)+3OH^(-)(aq),K_(sp)`
`Al(OH)_(3)(s)+OH^(-)(aq)hArrAl(OH)_(4)^(-)(aq),K_(c)`
Which of the following relationship is CORRECT at which solubility is minimum?

A

`[OH^(-)]=((K_(sp))/(K_(c)))^(1//3)`

B

`[OH^(-)]=((K_(c))/(K_(sp)))^(1//3)`

C

`[OH^(-)]=sqrt(((K_(sp))/(K_(c)))^(1//4))`

D

`[OH^(-)]=((3K_(sp))/(K_(c)))^(1//4)`

Text Solution

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The correct Answer is:
d
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