Assign $A, B, C, D$ from the given type of reaction.
$AlCl_3 + 3NaOH \longrightarrow Al(OH)_3 \downarrow + 3NaCl$

The solubility product constants of $M(OH)_3$ and $M(OH)_2$ are $10^{-23}$ and $10^{-14}$ respectively. If both ions are present in a solution,which one will precipitate first upon the addition of $NH_4OH$?

Why is only $As^{3+}$ precipitated as $As_2S_3$ when $H_2S$ is passed through an acidic solution containing $As^{3+}$ and $Zn^{2+}$,while $Zn^{2+}$ is not precipitated as $ZnS$?

Which hydroxide will have the lowest value of solubility product at normal temperature $({25\,^oC})$?

At $298 \, K$,the solubility of $PbCl_2$ is $2 \times 10^{-2} \, mol/L$,then $K_{sp} = ?$

How many grams of $CaC_2O_4$ will dissolve in distilled water to make $1 \, L$ of a saturated solution (in $, g$)? The solubility product $(K_{sp})$ of $CaC_2O_4$ is $2.5 \times 10^{-9} \, mol^2 \, L^{-2}$ and its molar mass is $128 \, g \, mol^{-1}$.