DP Chemistry (last assessment 2024)
Question 19M.3.hl.TZ1.2a(ii)
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.hl.TZ1.2a(ii) |
| Level | hl | Paper | 3 | Time zone | TZ1 |
| Command term | State | Question number | a(ii) | Adapted from | N/A |
a(ii).
[Maximum mark: 1]
19M.3.hl.TZ1.2a(ii)
Powdered zinc was reacted with 25.00 cm3 of 1.000 mol dm−3 copper(II) sulfate solution in an insulated beaker. Temperature was plotted against time.
(a(ii))
State what point Y on the graph represents.
[1]
Markscheme
highest recorded temperature
OR
when rate of heat production equals rate of heat loss [✔]
Examiners report
Most scored the mark in for stating that point Y either indicated the maximum temperature or the end of the reaction.
