Question

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Answer 1

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What happens when an acid reacts with metal carbonate? Write balanced chemical equation.

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When an acid reacts with metal carbonate, then a salt, water and carbon dioxide are produced.

$\bf{\underline {\blue{Acid+Metal~ carbonate\rightarrow Salt+Water+Carbon~dioxide}}}$

• Example : When dilute hydrochloric acid reacts with sodium carbonate, then sodium chloride, water and carbon dioxide are produced.

$\underline{\bf{\blue{Na_2CO_3(aq)+2HCl(aq)\rightarrow2NaCl+CO_2(g)+H_2O(l)}}}$

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What is an amphoteric oxide? Give example.

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Amphoteric oxides are the oxides that behave as both acidic and basic oxides. Such metallic oxides react with acids as well as bases to produce salt and water.

• Example : Examples of amphoteric oxides include aluminium oxide and zinc oxide.

$\bf{\underline{\blue{Al_2O_3(s)+6HCl(aq)\rightarrow2AlCl_3(aq)+3H_2O(l)}}}$

$\bf{\underline{\blue{ZnO+2NaOH\rightarrow Na_2ZnO_2+H_2O}}}$

Answer 2

When an acid reacts with a metal carbonate, then a salt, carbon dioxide and water are produced. Example: When dilute hydrochloric acid reacts with sodium carbonate, then sodium chloride, carbon dioxide and water are formed.