Equilibrium law and the expression for K

The second step converts nitrogen monoxide to nitrogen dioxide. $\ce{2NO(g) + O2(g) <=> 2NO2(g)}$ $\Delta H^\ominus = -114\ \mathrm{kJ\,mol^{-1}}$ (i) Identify the oxidation state of nitrogen in $\ce{NO}$ and in $\ce{NO2}$. (ii) State the equilibrium constant…

A related nitrile, ethanenitrile, $\ce{CH3CN}$, reacts with hydrogen according to the equilibrium: $\ce{CH3CN(g) + 2H2(g) <=> CH3CH2NH2(g)}$ (i) Write the expression for the equilibrium constant, $K$, for this reaction. (ii) Determine the oxidation states that…

A sample of 0.0120 mol of $\ce{NO2}$ was sealed in a vessel of volume 1.00 $\mathrm{dm^3}$ and kept at 10.0 °C until equilibrium was established. At equilibrium, the vessel contained 0.00860 mol of $\ce{NO2}$ and 0.00170 mol of $\ce{N2O4}$.…

When potassium thiocyanate solution is added to a pale yellow solution containing iron(III) ions, the following equilibrium is established. $\ce{[Fe(H2O)6]^3+(aq) + SCN^-(aq) <=> [Fe(SCN)(H2O)5]^2+(aq) + H2O(l)}$ $\ce{[Fe(H2O)6]^3+(aq)}$ is pale yellow and…

An equilibrium mixture in a 25.0 $\mathrm{dm^3}$ reactor at 500 °C contains 15.0 mol $\ce{N2}$, 22.5 mol $\ce{H2}$ and 5.25 mol $\ce{NH3}$. Calculate the equilibrium constant, $K$, for the reaction.

The following system is at equilibrium. $\ce{H2(g) + I2(g) <=> 2HI(g)}$ $K = 54$ What is the value of the equilibrium constant, K, for the reaction $\ce{2HI(g) <=> H2(g) + I2(g)}$? A. $-54$ B. $\dfrac{1}{54}$ C. $\sqrt{54}$ D. $\dfrac{1}{\sqrt{54}}$

(i) Deduce the expression for the equilibrium constant, $K$, for this reaction. (ii) $0.500\ \mathrm{mol}$ each of propan-1-ol and ethanoic acid, together with a small amount of concentrated sulfuric acid, reacted at constant volume. At equilibrium,…

Hexanoic acid, $\ce{CH3(CH2)4COOH}$, is a weak acid. The graph shows how the pH changes during the titration of a 20.0 $\mathrm{cm^3}$ aqueous solution of hexanoic acid with aqueous sodium hydroxide. (i) Deduce an expression for the equilibrium constant, $K$,…

What is the equilibrium constant expression for the following reaction? $\ce{CH4(g) + H2O(g) <=> CO(g) + 3H2(g)}$ A. $\dfrac{[\ce{CH4}][\ce{H2O}]}{[\ce{CO}][\ce{H2}]^3}$ B. $\dfrac{3[\ce{CO}][\ce{H2}]}{[\ce{CH4}][\ce{H2O}]}$ C.…