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# Form 4 Chemistry Paper 2 Sample Revision Questions With Answers

a).In an experiment to study the rate for reaction between duralumin (an alloy of aluminium, magnesium and copper) and hydrochloric acid, 0.5g of the alloy were reacted with excess 4M hydrochloric acid. The data in the table below was recorded. Use it to answer the questions that follow.

i) On the grid provided, plot a graph of total volume of gas produced (vertical axis) against time.
ii) From the graph, determine the volume of gas produced at the end of 2 1/2 minutes.
b) Determine the rate of reaction between the 3^(rd) and 4^(th) minute.
c).Give a reason why some solid remained at the end of the experiment.
d).Given that 2.5cm^3 of the total volume of the gas was from the reaction between magnesium and aqueous hydrochloric acid, (Al = 27.0 and Molar gas...

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