DP Chemistry (last assessment 2024)
Question 20N.3.hl.TZ0.6a(i)
| Date | November 2020 | Marks available | [Maximum mark: 1] | Reference code | 20N.3.hl.TZ0.6a(i) |
| Level | hl | Paper | 3 | Time zone | TZ0 |
| Command term | Determine | Question number | a(i) | Adapted from | N/A |
a(i).
[Maximum mark: 1]
20N.3.hl.TZ0.6a(i)
(a(i))
Proteins are polymers of amino acids.
A paper chromatogram of two amino acids, A1 and A2, is obtained using a non-polar solvent.
© International Baccalaureate Organization 2020.
Determine the value of A1.
[1]
Markscheme
✔
Accept any value within the range “”.
Examiners report
It was surprising that more did not manage to determine the Rf value of A1 within the acceptable range of "0.67 to 0.73". An out of range value of 0.75 was frequently seen.
