DP Chemistry (first assessment 2025)

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Question 19M.2.SL.TZ2.b

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Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.2.SL.TZ2.b
Level SL Paper 2 Time zone TZ2
Command term Describe Question number b Adapted from N/A
b.
[Maximum mark: 2]
19M.2.SL.TZ2.b

Describe how the relative reactivity of rhenium, compared to silver, zinc, and copper, can be established using pieces of rhenium and solutions of these metal sulfates.

[2]

Markscheme

place «pieces of» Re into each solution  [✔]

if Re reacts/is coated with metal, that metal is less reactive «than Re»  [✔]

 

Note: Accept other valid observations such as “colour of solution fades” or “solid/metal appears” for “reacts”.

Examiners report

This question was a good discriminator between high-scoring and low-scoring candidates. It was well answered by more than half of the candidates who had obviously carried out such displacement reactions and interpreted the outcomes during the course. Some candidates did not state the obvious of dipping the metal into the sulfates.

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