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A student used the apparatus shown in Figure 1 to investigate the reaction between marble chips and dilute hydrochloric acid - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2023 - Paper 2
Question 1
A student used the apparatus shown in Figure 1 to investigate the reaction between marble chips and dilute hydrochloric acid. The student recorded the volume of gas... show full transcript
Worked Solution & Example Answer:A student used the apparatus shown in Figure 1 to investigate the reaction between marble chips and dilute hydrochloric acid - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2023 - Paper 2
Step 1
Plot the results on the grid.
Answer
To plot the results, mark each pair of coordinates from Figure 2 onto the provided grid. For each time interval, plot the volume of gas produced:
- (0, 0)
- (1, 52)
- (2, 78)
- (3, 91)
- (4, 97)
- (5, 100)
- (6, 100)
Ensure that each point is accurately plotted, paying attention to the scale on both axes.
Step 2
Draw a curve of best fit.
Answer
Once all points are plotted, draw a smooth curve that best represents the trend of the plotted points. The curve should start at (0, 0) and gradually rise, reflecting the increasing volume of gas produced over time. Avoid straight lines and ensure the curve smoothly connects the points.
Step 3