DP Chemistry (last assessment 2024)
Question 19N.2.hl.TZ0.e(vi)
| Date | November 2019 | Marks available | [Maximum mark: 1] | Reference code | 19N.2.hl.TZ0.e(vi) |
| Level | hl | Paper | 2 | Time zone | TZ0 |
| Command term | Justify, Predict | Question number | e(vi) | Adapted from | N/A |
e(vi).
[Maximum mark: 1]
19N.2.hl.TZ0.e(vi)
Copper forms two chlorides, copper(I) chloride and copper(II) chloride.
Copper(I) chloride undergoes a disproportionation reaction, producing copper(II) chloride and copper.
2Cu+ (aq) → Cu (s) + Cu2+ (aq)
Predict, giving a reason, the effect of increasing temperature on the stability of copper(I) chloride solution.
[1]
Markscheme
TΔS more negative «reducing spontaneity» AND stability increases ✔
NOTE: Accept calculation showing non-spontaneity at 433 K.
