Chapter 7.4, Problem 7.10PP

Interpretation Introduction

Interpretation:

The concentration of ${\text{[I}}_{\text{2}}\text{]}$ has to be calculated, when ${\text{[H}}_{\text{2}}\text{]}$ and $\text{[HI]}$ where $\text{1}{\text{.0×10}}^{\text{-4}}\text{M}$.

Concept Introduction:

Equilibrium constant$\left(\text{K}\right)$:

It is the ratio of the concentrations of the products to concentrations of the reactants.  Each concentration term is raise to the power, which is same as the coefficients in the chemical reaction.

Consider the reaction,

  $\text{aA + bB}\stackrel{}{\rightleftharpoons }\text{ cC + dD}$

    $\text{k}\text{=}\frac{{\text{[C]}}^{\text{c}}{\text{[D]}}^{\text{d}}}{{\text{[A]}}^{\text{a}}{\text{[B]}}^{\text{b}}}$

Where,

    $\text{K}$ is the equilibrium constant.

    $\text{A,B,}\text{and}\text{C,D}$ are concentration of reactants and products.

    $\text{a, b and c, d}$ are coefficients of reactants and products.

If we want the concentrations of $\text{A}$ means jest rearrange the above equation to get it.

    ${\text{[A]}}^{\text{a}}\text{=}\frac{{\text{[C]}}^{\text{c}}{\text{[D]}}^{\text{d}}}{{\text{k[B]}}^{\text{b}}}$