What happens when a piece of aluminium metal is added to dilute hydrochloric acid?
Also, write the balanced chemical equation if the reaction occurs.

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Solution

Aluminium being more reactive than hydrogen displaces it from dilute hydrochloric acid solution and hydrogen gas is evolved.

$2Al(s) + 6 HCl (aq) \to 2 {AlCl}_{3} (aq) + 3 H_{2} (g)$

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