Jul 04, 2020 · Substances not precipitated by ammonium sulfide: Dissolve 1.0-g Zinc Carbonate in 10 mL of water and 2 mL of sulfuric acid, dilute with water to 80 mL, add 10 mL of ammonium hydroxide, and pass hydrogen sulfide through the solution for about 30 minutes. Dilute with water to 100 mL, and allow the precipitate to settle. Ammonium nitrate, 1 M, 1 N. Dissolve 80 g of NH4NO3 in 1 liter of water. Ammonium oxalate, 0.25 M, 0.5 N. Dissolve 35.5 g of (NH4)2C2O4.H2O in water. Dilute to 1 liter. Ammonium sulfate, 0.25 M, 0,5 N. Dissolve 33 g of (NH4)2SO4 in 1 liter of water. Ammonium sulfide, colorless: EXAMPLE 1 - Predicting Precipitation Reactions: Predict whether a precipitate will form when water solutions of silver nitrate, AgNO 3 (aq), and sodium sulfide, Na 2 S(aq), are mixed. If there is a precipitation reaction, write the complete and net ionic equation that describes the reaction. Solution: Step 1: Determine the possible products using the general double displacement equation.