Chapter 12, Problem 19QRT

(a)

Interpretation Introduction

Interpretation:

The equilibrium constant expression for the reaction ${\text{NH}}_{\text{3(g)}}{\text{ + ClF}}_{\text{3(g)}}\rightleftharpoons 3{\text{HF}}_{\text{(g)}}\text{ + }\frac{1}{2}{\text{N}}_{\text{2(g)}}\text{ + }\frac{1}{2}{\text{Cl}}_{\text{2(g)}}$ has to be written.

Concept Introduction:

Equilibrium constant: At equilibrium the ratio of products to reactants (each raised to the power corresponding to its stoichiometric coefficient) has a constant value, K

For a general reaction,

  $\text{aA+bB}\rightleftarrows \text{cC+dD}$

  $\text{Equilibrium}\text{constant}\text{K}\text{=}\frac{{\left[\text{C}\right]}^{\text{c}}{\left[\text{D}\right]}^{\text{d}}}{{\left[\text{A}\right]}^{\text{a}}{\left[\text{B}\right]}^{\text{b}}}$

The concentration of solids and pure liquids do not change, so their concentration terms are not included in the equilibrium constant expression.

(b)

Interpretation Introduction

Interpretation:

The equilibrium constant expression for the reaction ${\text{3ClO}}_{\text{2}}{{}^{-}}_{\text{(aq)}}\rightleftharpoons {\text{ 2ClO}}_{\text{3}}{{}^{-}}_{\text{(aq)}}{\text{ + Cl}}^{-}{}_{\text{(aq)}}$ has to be written.

Concept Introduction:

Refer part (a) for concept.

(c)

Interpretation Introduction

Interpretation:

The equilibrium constant expression for the reaction ${\text{IO}}_{3(\text{aq)}}^{-}+6{\text{OH}}_{(\text{aq)}}^{-}+{\text{Cl}}_{\text{2(aq)}}\rightleftharpoons {\text{ IO}}_{6\text{(aq)}}^{5-}{\text{+ 2Cl}}_{\text{(aq)}}^{-}{\text{+ 3H}}_{\text{2}}{\text{O}}_{\text{(l)}}$ has to be written.

Concept Introduction:

Refer part (a) for concept.