DP Chemistry (first assessment 2025)
Question 19M.2.SL.TZ2.d(iv)
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.2.SL.TZ2.d(iv) |
| Level | SL | Paper | 2 | Time zone | TZ2 |
| Command term | Calculate | Question number | d(iv) | Adapted from | N/A |
d(iv).
[Maximum mark: 1]
19M.2.SL.TZ2.d(iv)
The uncertainty of the 100.0cm3 volumetric flask used to make the solution was ±0.6cm3.
Calculate the maximum percentage uncertainty in the mass of NaHCO3 so that the concentration of the solution is correct to ±1.0 %.
[1]
Markscheme
«1.0 – 0.6 = ± » 0.4 «%» [✔]
Examiners report
Mixed responses, more attention should be given to this simple calculation which is straightforward and should be easy as required for IA reports.
