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pH the Power of H

From separate...

Question

From separate solutions of four sodium salts $N a W, N a X, N a Y$ and $N a Z$ has $p H 7.0, 9.0, 10.0$ and $11.0$ respectively. When each solution is $0.1 M$ , Van't Hoff factor (i) is maximum for acid:

A

H W

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B

H X

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C

H Y

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D

H Z

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Solution

The correct option is A $H W$
In the given salts, $N a W (p H = 7)$ has lowest $p H$
$⟶$ Acidic Salt
$W$ ion makes it acidic of type $H W$
Strongest Acid is $H W ⟹$ have maximum Van't Hoff factor $⟹ H W .$

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