Question
Name a solution that will separate the component of the following mixture: $Zn(OH)_2$ from $Pb(OH)_2$

Answer

$Zn(OH)_2$ from $Pb(OH)_2$ :
Ammonium hydroxide $\left( NH _4 OH \right)$ solution can separate
$Zn ( OH )_2$ from $Pb ( OH )_2$ as $Zn ( OH )_2$ precipitates are dissolved in excess of $NH _4 OH$ solution while $Pb ( OH )_2$ precipitates are insoluble in excess of $NH _4 OH$ solution.

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