Complete and balance the following chemical equations:
(i) `CaCO_(3)+HCl` (ii) `Al+HCl`
(iii) `MnO_(2)+HCl`

Explanation

(i) `CaCO_(3)(S)+2HCl(aq)rarrCaCl_(2)(S)+H_(2)O(l)+CO_(2)(g)`
(ii) `2Al(S)+6HCl(aq)rarr 2AlCl_(3)(aq)+3H_(2)(g)`
(iii) `MnO_(2)+4HCl(aq)rarr MnCl_(2)+2H_(2)O(l)+Cl_(2)(g)`