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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Question 41

What happens when a piece of

(a) zinc metal is added to copper sulphate solution?

(b) aluminium metal is added to dilute hydrochloric acid?

Also, write the balanced chemical equation if the reaction occurs.

(a) What happens when dilute hydrochloric acid is added to sodium carbonate ? Write a balanced chemical equation of the reaction involved.

(b) Which gas is liberated when dilute hydrochloric acid reacts with sodium carbonate ? How will you test for the presence of this gas ?

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