IB Chemistry SL 1.4.5 Molar Concentration Question Bank

Practise IB Chemistry SL 1.4.5 with questions calculating molar concentration, converting volumes, applying ion ratios and interpreting titration endpoints.

[Maximum number: 1]

Phenylethene (styrene) is produced from ethylbenzene in a gas-phase equilibrium.

Figure for Question 1.4.5—Molar concentration question 1 — IB Chemistry SL

Benzoic acid is a weak acid. The graph shows how the pH changes during the titration of a $10.0 \mathrm{~cm}^{3}$ aqueous solution of benzoic acid with aqueous sodium hydroxide.

Calculate the concentration of the benzoic acid solution, in $\mathrm{mol} \mathrm{dm}^{-3}$ , given that the sodium hydroxide concentration was $0.010 \mathrm{~mol} \mathrm{dm}^{-3}$ . the sodium hydroxide concentration was $0.010 \mathrm{~mol} \mathrm{dm}^{-3}$ .

$\text { « }(0.020 \times 0.010) \div 0.010=\text { » }$

0.020 «mol dm ${ }^{-3}$ »

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1.4.5—Molar concentration question 1