CSEC Chemistry · May/June 2017 · Paper 2 · Question 1(a)

An investigation into the effect of catalyst mass on the decomposition rate of hydrogen peroxide (H₂O₂) to produce oxygen and water. Manganese(IV) oxide (MnO₂) is used as the catalyst. For each experiment, a different mass of MnO₂ was combined with 50 cm³ of 0.8 mol dm⁻³ hydrogen peroxide solution, and the volume of oxygen produced was measured. Figure 1 shows the masses used on balances. Table 1 records the calculated rate of reaction for each quantity of catalyst.

The rate of the reaction for EACH quantity of catalyst used was calculated and recorded in Table 1. Use the balances shown in Figure 1 on page 5 to complete Table 1.

This question uses a figure or table from the paper — you'll see it when you practise.