Edexcel IGCSE Chemistry Graphical and Numerical Forms

Edexcel IGCSE Chemistry Graphical and Numerical Forms
Edexcel IGCSE Chemistry syllabusChemistry 4CH1Issue 3 (2024)

Practise Edexcel IGCSE Chemistry graphical and numerical forms by reading graph values, drawing guide lines and interpreting trends.

How this is tested

  • Use guide lines on a graph to determine volume, time, rate or another practical value.
  • Use graph data to identify trends, such as conductivity decreasing as acid volume increases.
  • Adjust graph readings for changed conditions, such as double acid concentration.

Question 4(b)(v)

[Maximum number: 2]

A student investigates the effect of temperature on the rate of reaction between two solutions, A and B . When the reaction occurs, the mixture turns from colourless to blue.

This is the student's method.
- pour 25 cm325 \mathrm{~cm}^{3} of solution A into a conical flask
- add solution B and measure the temperature of the mixture
- record the time taken for the mixture to turn blue

The student repeats this method at different temperatures.

The table shows the student's results.

Table for Question 4(b)(v) — Edexcel IGCSE Chemistry

Use your graph to determine the time taken for the mixture to turn blue at 55∘C55^{\circ} \mathrm{C}.

Show your working on the graph.
time taken = s