Explain why pure liquids and solids can ignored while writing the equilibrium constant expression?

Explanation

To explain why pure liquids and solids can be ignored while writing the equilibrium constant expression, we can break down the reasoning into a few clear steps:

### Step 1: Understanding Equilibrium Constant Expression
The equilibrium constant expression (Kc) is derived from the balanced chemical equation at equilibrium. It is defined as the ratio of the concentrations of products to the concentrations of reactants, each raised to the power of their respective stoichiometric coefficients.

### Step 2: Identifying Phases in the Reaction
Consider a general reaction:
\[ aA_{(s)} + bB_{(g)} \rightleftharpoons cC_{(g)} + dD_{(s)} \]
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