Strong and weak acids and bases

In aqueous solution hydrogen cyanide behaves as a weak acid. (i) Write an equation for the ionization of hydrogen cyanide in water. (ii) Outline two ways in which a solution of 0.050 $\mathrm{mol\,dm^{-3}}$ $\ce{HCN}$ could be distinguished experimentally from…

The rate of the reaction can be followed by measuring the volume of carbon dioxide collected as time passes. The graph shows the results obtained at 20 °C. (i) Sketch, on the same axes, the curve you would expect if the experiment were repeated with the acid…

Which solution has a pH of 11.0 at 298 K? A. $10^{-3}\ \mathrm{mol\,dm^{-3}}$ $\ce{KOH(aq)}$ B. $10^{-11}\ \mathrm{mol\,dm^{-3}}$ $\ce{KOH(aq)}$ C. $10^{-3}\ \mathrm{mol\,dm^{-3}}$ $\ce{NH3(aq)}$ D. $10^{-3}\ \mathrm{mol\,dm^{-3}}$ $\ce{HCl(aq)}$

What is the main reason why nitric acid has a lower pH than ethanoic acid of the same concentration? A. Nitric acid is an oxidizing agent. B. Nitric acid ionizes to a greater extent in water. C. The conjugate base of nitric acid is stronger than that of…

Which of these aqueous solutions has the highest pH? A. $0.10\ \mathrm{mol\,dm^{-3}}$ $\ce{HCl}$ B. $1.0\ \mathrm{mol\,dm^{-3}}$ $\ce{NH3}$ C. $0.10\ \mathrm{mol\,dm^{-3}}$ $\ce{KOH}$ D. $1.0\ \mathrm{mol\,dm^{-3}}$ $\ce{KOH}$

Hypochlorous acid is a weak acid. In water it is in equilibrium with its conjugate base, the hypochlorite ion, $\ce{OCl-}$, which kills microorganisms far less effectively than the acid molecule does. The graph shows what percentage of the dissolved chlorine…