A chemical manufacturer compares two samples of the same solid catalyst. The catalyst particles are cubic.
The samples contain the same total volume of catalyst and are tested under the same conditions.
| Sample | Length of each side of a catalyst particle in nm | Time to produce 50 cm3 of gas in s |
|---|---|---|
| A | 60 | 78 |
| B | 15 | 23 |
Calculate how many times greater the total surface area of sample B is than the total surface area of sample A.
Explain whether the results support the use of sample B to increase the rate of the reaction.
104 exam-style questions on AQA GCSE Chemistry 2.4 Bulk and surface properties of matter including nanoparticles, covering 2.4.1 Sizes of particles and their properties and 2.4.2 Uses of nanoparticles. Each one has a worked solution and a mark scheme showing where the marks go.