This question is about rate of reaction.
A student investigated the rate of the catalytic decomposition of hydrogen peroxide in the presence of a manganese(IV) oxide catalyst. The equation for the reaction is: 2H2O2(aq)→2H2O(l)+O2(g)2\text{H}_2\text{O}_2(\text{aq}) \rightarrow 2\text{H}_2\text{O}(\text{l}) + \text{O}_2(\text{g})2H2O2(aq)→2H2O(l)+O2(g)
Which state symbol in the equation for the reaction does not represent one of the three states of matter?
The student determined the rate of production of oxygen gas over time. What two pieces of measuring apparatus could the student use to carry out this determination by measuring the volume of gas?
The table below shows the volume of oxygen gas collected during the investigation:
| Time (s\text{s}s) | Volume of O2\text{O}_2O2 produced (cm3\text{cm}^3cm3) |
|---|---|
| 0 | 0 |
| 15 | 36 |
| 30 | 62 |
| 45 | 80 |
| 60 | 92 |
| 75 | 98 |
| 90 | 100 |
| 105 | 100 |
Calculate the average rate of gas production between 15 s15\text{ s}15 s and 45 s45\text{ s}45 s.
Give three conclusions that can be drawn about the rate of this reaction as time increases, using the data in the table.
The student repeated the investigation using a more finely powdered manganese(IV) oxide catalyst, keeping all other variables the same. Select the two correct statements from the options below:
Practise AQA GCSE Chemistry Rate of reaction with exam-style questions for Foundation and Higher tier. 46 questions covering Calculating rates of reactions, Factors which affect the rates of chemical reactions, Collision theory and activation energy, and Catalysts, matched to the AQA GCSE Chemistry (8462) 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.