Experiment 4.
Some of the acid was dissolved in sodium carbonate solution, sodium nitrite solution added, and after cooling, concentrated hydrochloric acid added drop by drop. Nitrous fumes were given off, but no precipitate appeared.
Some of the acid was dissolved in sodium carbonate solution, sodium nitrite solution added, and after cooling, concentrated hydrochloric acid added drop by drop. Nitrous fumes were given off, but no precipitate appeared.