Question

When aluminum, Al, metal is dipped in an aqueous solution of hydrochloric acid, HCl, hydrogen gas H_2 is produced with the formation of an aluminum chloride, AlCl_2, solution. Write the balanced chemical equation showing the phase of reactants and products. Express your answer as a chemical equation including phases.
2Al(s) + 6HCl(aq) rightarrow 2Al^3 6Cl(aq) + 3H_2(g)

Answer 1

Answer:

2Al(s) + 6HCl(aq) = 2AlCl3(aq) + 3H2(g)

Explanation:

The reaction is a displacement reaction.

The reaction does not commence immediately because the Al(aluminum) has Al2O3 (Aluminum oxide) which protect it from reacting with water.

It takes some time for the HCl (hydrochloric acid) to eat the coating, then the reaction proceed vigorously to produce hydrogen gas bubbles. Generally metals that are above hydrogen in the electrochemical series tend to displace Hydrogen from Hydrochloric acid. The more negative the electrochemical volts the more the tendency to lose electron. Metal above hydrogen have negative evolts while those below have positive evolts