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Edexcel IGCSE Chemistry Communicate Findings

Practise Edexcel IGCSE Chemistry communicating experimental findings by drawing best-fit curves through plotted reaction data.

Syllabus
Issue 3 (2024)
Course
Chemistry 4CH1

Exam points

  • Draw a curve of best fit through plotted points from a practical chemistry investigation.
  • Shape a best-fit curve so it starts correctly and levels off where the reaction data plateaus.

Communicate experimental findings question 1

[Maximum number: 1]

A student uses this apparatus to investigate the decomposition of hydrogen peroxide solution.

Figure for Question Communicate experimental findings question 1 — Edexcel IGCSE Chemistry

This is the equation for the reaction.

2H2O2→2H2O+O22 \mathrm{H}_{2} \mathrm{O}_{2} \rightarrow 2 \mathrm{H}_{2} \mathrm{O}+\mathrm{O}_{2}

The student measures the volume of oxygen collected at regular intervals until the reaction stops.

The table shows the student's results.

Table for Question Communicate experimental findings question 1 — Edexcel IGCSE Chemistry

Draw a curve of best fit.

Figure for Question Communicate experimental findings question 1 — Edexcel IGCSE Chemistry
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