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CAIE A-Level Chemistry P3.1 Collecting Data & Observations

Practise setting up apparatus, following practical instructions and recording enough precise readings or observations for analysis.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • Record a precise colour observation for bromine reacting with methanoic acid, excluding temperature change

P3.1—Successful collection of data and observations question 1

[Maximum number: 1]

Aqueous bromine reacts with methanoic acid to form hydrogen bromide and carbon dioxide gas.

Br2(aq)+HCO2H(aq)→2HBr(aq)+CO2( g)\mathrm{Br}_{2}(\mathrm{aq})+\mathrm{HCO}_{2} \mathrm{H}(\mathrm{aq}) \rightarrow 2 \mathrm{HBr}(\mathrm{aq})+\mathrm{CO}_{2}(\mathrm{~g})

The table shows the oxidation numbers of bromine and carbon in the species involved in this reaction.

Table for Question P3.1—Successful collection of data and observations question 1 — CAIE A-Level Chemistry AS

Suggest one change you would observe, ignoring temperature changes, when bromine reacts with methanoic acid.

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