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1 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
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 ... show full transcript
Worked Solution & Example Answer:1 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 from Figure 2
Answer
Begin by marking the points on the grid according to the data provided:
- For time 0 minutes, plot at 0 cm³.
- For time 1 minute, plot at 52 cm³.
- For time 2 minutes, plot at 78 cm³.
- For time 3 minutes, plot at 91 cm³.
- For time 4 minutes, plot at 97 cm³.
- For time 5 minutes, plot at 100 cm³.
- For time 6 minutes, plot at 100 cm³.
Connect the points with a smooth curve to depict the relationship accurately, ensuring it reflects the gradual increase and leveling off of gas production.
Step 2
Draw a curve of best fit
Answer
Using a ruler, draw a smooth curve that best connects the points plotted. Ensure the curve starts at the origin (0,0) and smoothly approaches the points plotted, particularly emphasizing a natural flow without any sharp angles, illustrating the trend of gas production over time.