1. How would hydroxide ions influence the concentration of sulfide ions?
2. Explain the dissolution of the sulfides of copper, bismuth and cadmium in nitric acid. Include ionic equations.
3. If a yellow precipitate is obtained upon addition of hydrogen sulfide to an unknown solution of Group II cations, which ions are probably present?
4.In the identification of bismuth, why must the sodium stannite be prepared just prior to use?