A student investigates the rate of reaction between a fixed mass of magnesium ribbon and an excess of 1.0 mol dm-3 ethanoic acid.
Which of the following modifications to the procedure would increase the initial rate of this reaction?
Replacing the 1.0 mol dm−31.0\text{ mol dm}^{-3}1.0 mol dm−3 ethanoic acid with 1.0 mol dm−31.0\text{ mol dm}^{-3}1.0 mol dm−3 hydrochloric acid
Doubling the volume of the 1.0 mol dm−31.0\text{ mol dm}^{-3}1.0 mol dm−3 ethanoic acid
Performing the reaction in a larger conical flask to increase the headspace volume
Using a thicker magnesium ribbon of the same mass
Practise Edexcel GCSE Chemistry Rates of reaction with exam-style questions for Foundation and Higher tier. 166 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
