Chemistry 9701 · AS & A Level · Atoms, molecules and stoichiometry

Atoms, molecules and stoichiometry — practice question

Sodium hydroxide reacts to neutralise an acid. $\text{H}^+ + \text{OH}^- \rightarrow \text{H}_2\text{O}$. For a $11000\,\text{dm}^3$ sample of an aqueous solution, the acid concentration, $[\text{H}^+]$, is $1.26 \times 10^{-3}\,\text{mol dm}^{-3}$. What mass of solid sodium hydroxide is needed to neutralise the acid?

  • A$0.0214\,\text{g}$
  • B$0.0504\,\text{g}$
  • C$236\,\text{g}$
  • D$554\,\text{g}$

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