AQA GCSE · Question 07.4 · The rate and extent of chemical change
Plot the data from Table 5 on Figure 6. You should include your answer to Question 07.3. You do not need to draw a line of best fit.
How to approach this question
1. Use the "Mean" column from Table 5 for the y-values and the "Time in seconds" column for the x-values.
2. For the point at 40 seconds, use your calculated mean value, X = 47.
3. For each pair of values (Time, Mean Volume), find the correct position on the graph.
- (0, 0)
- (40, 47): Go to 40 on the x-axis, then up to 47 on the y-axis (just below the 50 line).
- (80, 82): Go to 80 on the x-axis, then up to 82 on the y-axis.
- (120, 96): Go to 120 on the x-axis, then up to 96 on the y-axis.
- (160, 100): Go to 160 on the x-axis, then up to 100 on the y-axis.
4. Mark each point clearly with a small cross or a circled dot.
Full Answer
The data to be plotted are the mean values against time. The coordinates are (Time, Mean Volume).
From Table 5 (and using X=47 from Q07.3):
- (0, 0)
- (40, 47)
- (80, 82)
- (120, 96)
- (160, 100)
Each point should be located accurately on the grid. The y-axis scale has major lines every 10 units, with 5 small squares in between, so each small square represents 2 units. The x-axis scale has major lines every 20 units, with 10 small squares in between, so each small square represents 2 units.
Common mistakes
✗ Plotting individual test results instead of the mean.
✗ Using the anomalous result for the point at 40 seconds.
✗ Misreading the scales on the axes.
✗ Swapping the axes (plotting time on y-axis and volume on x-axis).
Expert