DP Chemistry (last assessment 2024)
Question 18M.2.hl.TZ1.b.v
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.2.hl.TZ1.b.v |
| Level | hl | Paper | 2 | Time zone | TZ1 |
| Command term | Calculate, State | Question number | b.v | Adapted from | N/A |
b.v.
[Maximum mark: 2]
18M.2.hl.TZ1.b.v
Calcium carbonate reacts with hydrochloric acid.
CaCO3(s) + 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g)
The results of a series of experiments in which the concentration of HCl was varied are shown below.
Calculate the rate constant of the reaction, stating its units.
[2]
Markscheme
0.02
s–1
[2 marks]
