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Metals

Metal compone...

Question

Metal components 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.

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Solution

Metal compound A is CaCO3
Gas evolved is CO2
Balanced equation:
CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l)

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