ConceptConceptDocsDocuments

IB Chemistry SL 2.2.3 Factors affecting rate Question Bank

Practise IB Chemistry SL 2.2.3 by applying factors affecting rate 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

2.2.3—Factors affecting rate question 1

[Maximum number: 2]

0.100 g of magnesium ribbon is added to 50.0 cm350.0 \mathrm{~cm}^{3} of 1.00moldm−31.00 \mathrm{moldm}^{-3} sulfuric acid to produce hydrogen gas and magnesium sulfate.

Mg( s)+H2SO4(aq)→H2( g)+MgSO4(aq)\mathrm{Mg}(\mathrm{~s})+\mathrm{H}_{2} \mathrm{SO}_{4}(\mathrm{aq}) \rightarrow \mathrm{H}_{2}(\mathrm{~g})+\mathrm{MgSO}_{4}(\mathrm{aq})

The graph shows the volume of hydrogen produced against time under these experimental conditions.

Figure for Question 2.2.3—Factors affecting rate question 1 — IB Chemistry SL

Sketch two curves, labelled I and II, to show how the volume of hydrogen produced (under the same temperature and pressure) changes with time when:

I. using the same mass of magnesium powder instead of a piece of magnesium ribbon;
II. 0.100 g of magnesium ribbon is added to 50 cm350 \mathrm{~cm}^{3} of 0.500moldm−30.500 \mathrm{moldm}^{-3} sulfuric acid.

All question bank results loaded