name the gas formed at the negative electrode
Q2.â¬â¬â¬â¬â¬â¬â¬â¬â¬ The electrolysis of sodium chloride solution is an important industrial process. Three useful substances are produced: â¢â¬â¬â¬â¬â¬â¬â¬ chlorine gas is formed at the positive electrode; â¢â¬â¬â¬â¬â¬â¬â¬ hydrogen gas is formed at the negative electrode; â¢â¬â¬â¬â¬â¬â¬â¬ an alkali is left in the solution.â¬â¬â¬â¬â¬â¬â¬â¬ At the positive electrode Cl â â¬â¬â¬â¬â¬â¬â¬ ââ¬â¬â¬â¬â¬â¬â¬ e â â¬â¬â¬ââ¬â¬â¬â¬â¬â¬â¬â¬ Cl 2 â¬â¬â¬â¬â¬â¬â¬â¬â¬ At the negative electrode Naâ¬â¬â¬â¬â¬â¬â¬â¬â¬â¬â¬â¬â¬â¬â¬â¬â¬â¬â¬â¬â¬â¬ ââ¬â¬â¬â¬â¬â¬â¬â¬â¬â¬â¬ Na (2) (b)â¬â¬â¬â¬ Silver halides such as silver chloride and silver bromide are used in photography. The equation shows a reaction to prepare a silver halide.