DP Chemistry (last assessment 2024)
Question 18N.1.sl.TZ0.16
| Date | November 2018 | Marks available | [Maximum mark: 1] | Reference code | 18N.1.sl.TZ0.16 |
| Level | sl | Paper | 1 | Time zone | TZ0 |
| Command term | Question number | 16 | Adapted from | N/A |
16.
[Maximum mark: 1]
18N.1.sl.TZ0.16
Samples of sodium carbonate powder were reacted with separate samples of excess hydrochloric acid.
Na2CO3 (s) + 2HCl (aq) → CO2 (g) + 2NaCl (aq) + H2O (l)
Reaction I: 1.0 g Na2CO3 (s) added to 0.50 mol dm−3 HCl (aq)
Reaction II: 1.0 g Na2CO3 (s) added to 2.0 mol dm−3 HCl (aq)
What is the same for reactions I and II?
A. Initial rate of reaction
B. Total mass of CO2 produced
C. Total reaction time
D. Average rate of production of CO2
[1]
Markscheme
B