O-LevelChemistryRates of Reaction5070/12 · Oct/Nov 2017 · Q211 Mark
Magnesium reacts with dilute sulfuric acid. Mg(s) + H2SO4(aq) → MgSO4(aq) + H2(g) Two experiments were carried out. experiment 1 24.0 g of magnesium was reacted with 100 cm³ of 1.0 mol/dm³ sulfuric acid. experiment 2 24.0 g of magnesium was reacted with 50 cm³ of 2.0 mol/dm³ sulfuric acid. In each experiment the volume of hydrogen was measured at various times. The results were plotted on a graph. Which graph is correct?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
AGraph where Experiment 2 produces hydrogen faster but reaches the same final volume as Experiment 1, which is slower.
BGraph where Experiment 2 produces more hydrogen and faster than Experiment 1.
CGraph where Experiment 1 produces more hydrogen and faster than Experiment 2.
DGraph where Experiment 1 produces hydrogen faster but reaches the same final volume as Experiment 2, which is slower.
✓ Correct answer
A: Graph where Experiment 2 produces hydrogen faster but reaches the same final volume as Experiment 1, which is slower.
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