A metal salt solution gives a yellow precipitate with silver nitrate. The precipitate dissolves in dilute nitric acid as well as in dilute ammonia solution. The solution contains

${\mathrm{Ag}}_3{\mathrm{PO}}_4$ is a yellow precipitate that is both soluble and dispersible in diluted ammonia solution ${\mathrm{HNO}}_3$. 

$\begin{array}{l}{\mathrm{HPO}}_4^{2-}+3{\mathrm{Ag}}^{+}\to {\mathrm{Ag}}_3{\mathrm{PO}}_4\downarrow +{\mathrm{H}}^{+}\\ {\mathrm{Ag}}_3{\mathrm{PO}}_4+2{\mathrm{H}}^{+}\to {\mathrm{H}}_2{\mathrm{PO}}_4^{-}\downarrow +3{\mathrm{Ag}}^{+},{\mathrm{Ag}}_3{\mathrm{PO}}_4\downarrow +6{\mathrm{NH}}_3\\ \to 3{\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]}^{+}+{\mathrm{PO}}_4^{3-}\end{array}$

Bright yellow precipitate of $AgBr$ is not soluble in either diluted  ${\mathrm{HNO}}_3$  and ${\mathrm{Ag}}_2{\mathrm{CrO}}_4$ is formed as red precipitate. Pale yellow precipitate of $AgBr$ is not soluble in either.