Lawrie Ryan and Roger Norris Solutions for Chapter: Equilibria, Exercise 14: Questions

Hydrazine, ${\mathrm{N}}_2{\mathrm{H}}_4$, is a weak base. Write a chemical equation to show the equilibrium reaction of hydrazine with water.

Hydrazine, ${\mathrm{N}}_2{\mathrm{H}}_4$, is a weak base. State the relative concentrations (high or low) of the ${\mathrm{N}}_2{\mathrm{H}}_4$, molecules and the products.

The $\mathrm{pH}$ of a solution depends on the hydrogen ion (hydroxonium ion) concentration. Which concentration of ethanoic acid in Table $8.10$ has the highest concentration of hydrogen ions in solution?

Which acid or alkali in Table $8.10$ has the highest concentration of hydroxide ions?

Explain why a solution of $0.1 \mathrm{mol} {\mathrm{dm}}^{-3}$ ethanoic acid has a lower electrical conductivity than a solution of $0.1 \mathrm{mol} {\mathrm{dm}}^{-3}$ hydrochloric acid.

Both hydrochloric acid and ethanoic acid react with magnesium. The rate of reaction of $1.0 \mathrm{mol} {\mathrm{dm}}^{-3}$ hydrochloric acid with magnesium is much faster than the rate of reaction of $1.0 \mathrm{mol} {\mathrm{dm}}^{-3}$ ethanoic acid. Explain why.