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IB Chemistry SL 3.1.4 pH scale Question Bank

Practise IB Chemistry SL 3.1.4 by applying ph scale to exam-style questions.

Syllabus
First assessment 2025
Course
Chemistry SL
Level
SL

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

3.1.4—pH scale question 1

[Maximum number: 1]

Chlorine undergoes many reactions.

Chlorine gas reacts with water to produce hypochlorous acid and hydrochloric acid.

Cl2( g)+H2O(l)⇌HClO(aq)+HCl(aq)\mathrm{Cl}_{2}(\mathrm{~g})+\mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \rightleftharpoons \mathrm{HClO}(\mathrm{aq})+\mathrm{HCl}(\mathrm{aq})

Calculate the concentration of H+(aq)\mathrm{H}^{+}(\mathrm{aq}) in a HClO(aq) solution with a pH=3.61.

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