Basic salts are formed from the neutralisation reaction between a strong base and a weak acid.
Here, sodium acetate (${\text{CH}}_3\text{COONa}$) is a basic salt because it is formed from the reaction between sodium hydroxide which is a strong base ($\text{NaOH}$) and acetic acid (${\text{CH}}_3\text{COOH}$) which is a weak acid. The reaction involved is given below:
 $\text{NaOH(aq)}+{\text{CH}}_3\text{COOH(aq)}\to {\text{CH}}_3\text{COONa(aq)}+{\text{H}}_2\text{O(aq)}$
Hydrochloric acid ($\text{HCl}$) is an acid, sodium chloride ($\text{NaCl}$) is a neutral salt and tin chloride (${\text{SnCl}}_2$) is an acidic salt.