DP Chemistry (last assessment 2024)
Question 21M.2.sl.TZ2.1c(i)
| Date | May 2021 | Marks available | [Maximum mark: 1] | Reference code | 21M.2.sl.TZ2.1c(i) |
| Level | sl | Paper | 2 | Time zone | TZ2 |
| Command term | Sketch | Question number | c(i) | Adapted from | N/A |
c(i).
[Maximum mark: 1]
21M.2.sl.TZ2.1c(i)
Limestone can be converted into a variety of useful commercial products through the lime cycle. Limestone contains high percentages of calcium carbonate, CaCO3.
(c(i))
The potential energy profile for a reaction is shown. Sketch a dotted line labelled “Catalysed” to indicate the effect of a catalyst.
[1]
Markscheme
lower activation energy curve between same reactant and product levels ✓
Accept curve with or without an intermediate.
Accept a horizontal straight line below current line with the activation energy with catalyst/Ecat clearly labelled.