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A student investigated the rate of reaction between dilute hydrochloric acid and marble chips (calcium carbonate) - Edexcel - GCSE Chemistry - Question 8 - 2016 - Paper 1
Question 8
A student investigated the rate of reaction between dilute hydrochloric acid and marble chips (calcium carbonate). Calcium chloride, carbon dioxide and water are fo... show full transcript
Worked Solution & Example Answer:A student investigated the rate of reaction between dilute hydrochloric acid and marble chips (calcium carbonate) - Edexcel - GCSE Chemistry - Question 8 - 2016 - Paper 1
Step 1
Complete and balance the equation for the reaction.
Answer
The balanced equation for the reaction between calcium carbonate and hydrochloric acid is:
This equation shows that one mole of calcium carbonate reacts with two moles of hydrochloric acid to produce one mole of calcium chloride, one mole of carbon dioxide, and one mole of water.
Step 2
State how the graph shows that line B gives the results for the larger marble chips.
Answer
Line B on the graph exhibits a slower rate of gas production compared to line A. This indicates that larger marble chips have a lower surface area, leading to a slower reaction rate with hydrochloric acid.
Step 3