What is the active mass (in ) of of pure solid when it is participating in a chemical equilibrium expression?

Question

What is the active mass (in $	ext{mol L}^{-1}$) of $40	ext{ g}$ of pure solid $NaCl$ when it is participating in a chemical equilibrium expression?

Prashant Kotian · Accepted Answer

Correct answer: 1. The active mass (molar concentration) of pure solids and pure liquids is constant because their density and molar mass do not change. By convention, the active mass of pure solids is always taken as unity () in equilibrium expressions.

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