A salt X, on heating releases CO₂ gas .If one molecule of this salt reacts with two molecules of HCl (acid),.calculate the number of metal atoms present in one molecule of X and determine the formula of X.

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Solution

Let the metal atom be M.
Since the salt X produces CO₂ gas, the salt is a carbonate. (MCO₃).
The salt X reacts with 2 molecules of HCl and the salt formed should be MCl₂.
Hence valency of the metal atom is 2.
MCO₃ (s) + 2HCl (l)l $\to$ MCl₂(aq)+ H₂O(l) +CO₂(g).
Therefore, the number of metal atoms present in one molecule of X is one.
The formula of X is MCO₃.

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A salt X, on heating releases CO2 gas .If one molecule of this salt reacts with two molecules of HCl (acid),.calculate the number of metal atoms present in one molecule of X and determine the formula of X.

A salt X, on heating releases CO₂ gas .If one molecule of this salt reacts with two molecules of HCl (acid),.calculate the number of metal atoms present in one molecule of X and determine the formula of X.