Chemistry 0620 · IGCSE · The characteristic properties of acids and bases

The characteristic properties of acids and bases — practice question

A solution that contains hydroxide ions, $\text{OH}^-\text{(aq)}$, is introduced into a solution containing hydrogen ions, $\text{H}^+\text{(aq)}$. An equation for the reaction is shown. $\text{H}^+\text{(aq)} + \text{OH}^-\text{(aq)} \rightarrow \text{H}_2\text{O(l)}$ Which statement about this reaction is correct?

  • AThe hydrogen ions represent an alkali.
  • BThe reaction is a neutralisation reaction.
  • CThe reaction is a reduction.
  • DAs the $\text{OH}^-$ ions are added, the pH of the reaction mixture falls.

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