1.

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

Answer»

(a)  CO2 

(b)  A must be a metal carbonate. CaCO3(s) + 2HCl  CaCl2(s) + H2O(l) + CO2



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