Vapour density of a metal chloride is 66. Its equivalent weight is 3. The valency of the metal is: — Mole Concept and Some Basic Concepts of Chemistry Chemistry Question

💡 Solution & Explanation

$\text{MW} = 2 \times 66 = 132$. $\text{Formula } MCl_x \Rightarrow 132 = (E \times x) + 35.5x \Rightarrow 132 = 3x + 35.5x \Rightarrow 38.5x = 132 \Rightarrow x \approx 3.4$. Closest integer valency is 4 (or 3 depending on exact atomic weight).