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An aqueous solution is 0.3 M in Al^(3+) ...

An aqueous solution is 0.3 M in `Al^(3+)` and 3 M in `Mg^(2+)`. Select the only incorrect option.
Given : `(K_(sp))_(Al(OH)_(3))=3xx10^(-34)`, `(K_(sp))_(Mg(OH)_(2))=3xx10^(-12)`,

A

At pH=9 both `Al(OH)_(2)` and `Mg(OH)_(2)` will precipitate

B

At pOH=12 nether `Al(OH)_(3)` nor `Mg(OH)_(2)` will precipitate

C

For selective precipitation of `Al(OH)_(2)` only, pH of solution should be 3 to 8

D

`Mg(OH)_(2)` will precipitate at maximum pH=8

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The correct Answer is:
d
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