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Metal compound A reacts with dilute hydr...

Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.

Text Solution

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The gas the extinguishes a burning candle is carbon dioxide. It is formed by the action of dilute hydrochloric acid on metal carbonate or metal hydrogencarbonate and produces effervescence . Since one of the compounds formed is calcium chloride, this shows that the metal compound is calcium carbonate. It cannotbe calcium hydrogencarbonate because calcium hydrogencarbonate is found in solution .
Thus , the metal compound A is calcium carbonate `(CaCO_3)` .
Calcium carbonate reacts with dilute hydrochloric acid to form calcium chloride. carbon dioxide and water .
`CaCO_(3)(s)+2HCl(aq) rarrCaCl_(2)(aq)+CO_(2)(g)+H_(2)O(l)`
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