DP Chemistry (last assessment 2024)
Question 22M.1.hl.TZ2.23
| Date | May 2022 | Marks available | [Maximum mark: 1] | Reference code | 22M.1.hl.TZ2.23 |
| Level | hl | Paper | 1 | Time zone | TZ2 |
| Command term | Solve | Question number | 23 | Adapted from | N/A |
23.
[Maximum mark: 1]
22M.1.hl.TZ2.23
0.50 mol of (g) and 0.50 mol of Br2 (g) are placed in a closed flask. The following equilibrium is established.
(g) + Br2 (g) 2Br (g)
The equilibrium mixture contains 0.80 mol of Br (g). What is the value of Kc?
A. 0.64
B. 1.3
C. 2.6
D. 64
[1]
Markscheme
D
Examiners report
41% of the candidates were able to calculate Kc given the initial amounts of reactants and the amount of product at equilibrium.