Chemistry · May / June 2021 · Paper 12 · Question 19

Magnesium reacts with dilute sulfuric acid. Mg(s) + H2SO4(aq) → MgSO4(aq) + H2(g) Two experiments are carried out at 25 °C. experiment 1 24.0 g of powdered magnesium is reacted with 100 cm3 of 1.0 mol / dm3 sulfuric acid. experiment 2 24.0 g of powdered magnesium is reacted with 50 cm3 of 2.0 mol / dm3 sulfuric acid. During each experiment the volume of hydrogen produced is measured. The results are plotted on a graph. Which graph is correct?

1. Agraph A
2. Bgraph B
3. Cgraph C
4. Dgraph D

As printed in the paper