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Solubility Product

In which of t...

Question

In which of the following solvents will $A g B r$ has highest solubility?

10^{- 3}

N a B r

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10^{- 3} M N H_{4} O H

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H_{2} O

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10^{- 3} M H B r

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Solution

The correct option is C $10^{- 3} M N H_{4} O H$
AgBr will form soluble complex with $N H_{4} O H$ , i.e., $[A g (N H_{3})_{2}] B r$ .
The key to this problem is something called the "common ion effect." In essence, the solubility of an ionic solute is much lower in a solvent that already contains one of the ions of the solute.

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