DP Chemistry (last assessment 2024)
Question 18N.2.hl.TZ0.c.ii
| Date | November 2018 | Marks available | [Maximum mark: 2] | Reference code | 18N.2.hl.TZ0.c.ii |
| Level | hl | Paper | 2 | Time zone | TZ0 |
| Command term | Outline | Question number | c.ii | Adapted from | N/A |
c.ii.
[Maximum mark: 2]
18N.2.hl.TZ0.c.ii
3.26 g of iron powder are added to 80.0 cm3 of 0.200 mol dm−3 copper(II) sulfate solution. The following reaction occurs:
Fe (s) + CuSO4 (aq) → FeSO4 (aq) + Cu (s)
Outline how the initial rate of reaction can be determined from the graph in part (c)(i).
[2]
Markscheme
«draw a» tangent to the curve at time = 0 ✔
«rate equals» gradient/slope «of the tangent» ✔
Accept suitable diagram.
