IB Chemistry SL 3.1.5 Ion product of water (Kw) Question Bank

Practise IB Chemistry SL 3.1.5 by applying ion product of water (kw) to exam-style questions.

Exam points

identify the relevant chemical structure, process or evidence
apply the correct chemical model or equation
evaluate the result using chemical reasoning and data

[Maximum number: 1]

Soluble acids and bases ionize in water.

A solution containing 0.510 g of an unknown monoprotic acid, HA , was titrated with $0.100 \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{NaOH}(\mathrm{aq}) .25 .0 \mathrm{~cm}^{3}$ was required to reach the equivalence point.

Calculate $\left[\mathrm{H}^{+}\right]$ in the NaOH solution.

$1.00\times10^{-14}=[\mathrm{H^+}]\times0.100$ $[\mathrm{H^+}]=1.00\times10^{-13}\ \mathrm{mol\ dm^{-3}}$

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3.1.5—Ion product of water (Kw) question 1