Question

construct the expression for kc for the following reaction. h₂o(l) ⇌ h⁺(aq) + oh⁻(aq). drag the tiles into the numerator or denominator to form the expression. each reaction participant must be represented by one tile. do not combine terms.

Explanation:

Step1: Recall equilibrium - constant expression rules

For a reaction $aA + bB
ightleftharpoons cC + dD$, the equilibrium - constant expression $K_c=\frac{[C]^c[D]^d}{[A]^a[B]^b}$, where $[X]$ represents the molar concentration of species $X$. For the reaction $H_2O(l)
ightleftharpoons H^+(aq)+OH^-(aq)$, the concentration of the pure liquid $H_2O$ is not included in the $K_c$ expression (since the concentration of a pure liquid is considered constant).

Step2: Write the $K_c$ expression

The $K_c$ expression for the reaction $H_2O(l)
ightleftharpoons H^+(aq)+OH^-(aq)$ is $K_c = [H^+][OH^-]$.

Answer:

$K_c=[H^+][OH^-]$