Chemistry 0620 · IGCSE · Acid–base titrations

Acid–base titrations — practice question

An aqueous sodium hydroxide solution of known volume and concentration is titrated with dilute hydrochloric acid. The volume of dilute hydrochloric acid needed to bring about complete neutralisation of the sodium hydroxide is measured. Five calculation stages are listed below. 1 Calculate the moles of hydrochloric acid present. 2 Calculate the relative formula mass for hydrochloric acid. 3 Calculate the hydrochloric acid concentration in $\text{g dm}^{-3}$. 4 Calculate the moles of sodium hydroxide. 5 Calculate the hydrochloric acid concentration in $\text{mol dm}^{-3}$. What is the correct order of these steps to work out the hydrochloric acid concentration in $\text{g dm}^{-3}$?

  • A$1 \rightarrow 4 \rightarrow 3 \rightarrow 5 \rightarrow 2$
  • B$1 \rightarrow 2 \rightarrow 4 \rightarrow 5 \rightarrow 3$
  • C$4 \rightarrow 1 \rightarrow 5 \rightarrow 2 \rightarrow 3$
  • D$4 \rightarrow 2 \rightarrow 1 \rightarrow 3 \rightarrow 5$

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