Sulfuric acid is a strong acid with the formula Sodium carbonate is a salt of weak carbonic acid
and its formula is
Usually when a strong acid reacts with a salt of a weak acid, the salt of the strong acid and the weak acid occur. In this problem the reaction satisfies this rule, and sodium sulphate and carbonic acid are formed. Also carbonic acid is unstable and forms water
and carbon dioxide
which goes out as a gas.
So the (potentially unbalanced) reaction is
When we examine this equation with respect to all chemical elements involved, it appears to be balanced.
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