To form the aluminum sulfide the elemental aluminum reacts with the elemental sulfur. When this compound is mixed with the water, a white precipitate and a foul-smelling gas are produced. Write down a balanced chemical equation to account for these observations, and explain why this reaction precedes in the direction it does.
Al2S3 + H2O yields 2Al(OH)3 (s) + 3 H2S (g)