← Chemistry (0620)
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Rate of reaction
Higher
3 marks
Describe an experiment to investigate how surface area affects the rate of reaction between marble chips and dilute hydrochloric acid.
A
Same mass of chips vs powder with same acid; record mass loss (CO2) over time; powder reacts faster (steeper curve); control temperature/concentration
B
Change temperature only; use same surface area
C
Change acid concentration; leave surface area constant
D
Measure volume of acid used, not mass or gas produced
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