Skip to content

Course home

8.1 Rates of reaction

8.1 Rates of reaction

EasyMediumHard
1234567891011121314151617181920212223242526272829303132333435363738394041424344
Question 42

Sodium thiosulfate solution reacts with dilute hydrochloric acid to form a cloudy precipitate of sulfur.

Na2S2O3(aq)+2HCl(aq)→2NaCl(aq)+H2O(l)+S(s)+SO2(g) \text{Na}_2\text{S}_2\text{O}_3(\text{aq}) + 2\text{HCl}(\text{aq}) \rightarrow 2\text{NaCl}(\text{aq}) + \text{H}_2\text{O}(\text{l}) + \text{S}(\text{s}) + \text{SO}_2(\text{g}) Na2​S2​O3​(aq)+2HCl(aq)→2NaCl(aq)+H2​O(l)+S(s)+SO2​(g)

A student wants to investigate how the rate of this reaction is affected by temperature. They plan to use the 'disappearing cross' experiment.

Devise a method the student could use to obtain a range of results at different temperatures.

[3]
Markscheme

8.1 Rates of reaction Questions

  1. GCSE
  2. /Chemistry
  3. /8.1 Rates of reaction

127 exam-style questions on Edexcel GCSE Chemistry 8.1 Rates of reaction, covering 8.1.1 Measuring and interpreting rates of reaction, 8.1.2 Collision theory and the factors affecting rate, and 8.1.3 Catalysts and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank