SATHEE: Equilibrium - Result Question 99

Equilibrium - Result Question 99

####103. In which of the following solvents, $A g B r$ will have the highest solubility?

[1992]

(a) $10^{- 3} M N a B r$

(b) $10^{- 3} M N H_{4} O H$

(c) Pure water

(d) $10^{- 3} M H B r$

Show Answer

Solution:

(b) $A g B r$ has the highest solubility in $10^{- 3} M$

$N H_{4} O H . A g B r$ is less soluble in $N a B r$ and $H B r$ due to presence of common ion $(B r)$ . With $N H_{4} O H, A g B r$ will react as:

$A g B r (s) + 2 N H_{4} O H$ (aq.)

$a r r o w [A g (N H_{3})_{2}] B r ($ aq. $) + 2 H_{2} O (l)$

Hence, the highest solubility with $N H_{4} O H$ solution.

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