The group reagent $NH_4Cl_{(s)}$ and aqueous $NH_3$ will precipitate which of the following ions?

Which compound is used to distinguish between $Fe^{2+}$ and $Fe^{3+}$ ions?

Nessler's reagent is used to detect

Which of the following solutions will yield a black precipitate when $H_2S$ gas is passed through it?

The only cations present in a slightly acidic solution are $Fe^{3+}$,$Zn^{2+}$,and $Cu^{2+}$. The reagent that when added in excess to this solution would identify and separate $Fe^{3+}$ in one step is

What color does lead acetate give with $H_2S$?