Question

Write balanced equations for the following reactions:

Hint:

For reactions involving ions, always balance both the mass and charge on both sides of the equation.

Answer 1

(i) Calcium hydroxide + Carbon dioxide $\to$ Calcium carbonate + Water
\[ \text{Ca(OH)}_2 + \text{CO}_2 \to \text{CaCO}_3 + \text{H}_2\text{O} \] (ii) Barium chloride + Potassium sulphate $\to$ Barium sulphate + Potassium chloride
\[ \text{BaCl}_2 + \text{K}_2\text{SO}_4 \to \text{BaSO}_4 + 2\text{KCl} \] (iii) Zinc + Sulphuric acid $\to$ Zinc sulphate + Hydrogen
\[ \text{Zn} + \text{H}_2\text{SO}_4 \to \text{ZnSO}_4 + \text{H}_2 \] (iv) Silver nitrate + Zinc chloride $\to$ Silver chloride + Zinc nitrate
\[ \text{AgNO}_3 + \text{ZnCl}_2 \to \text{AgCl} + \text{Zn(NO}_3\text{)}_2 \]