Quelpr
2 marksRedox Reactions

CAPE Chemistry Unit 1 · 2005 · Paper 1 · Question 2(b)(ii)

Sulphur dioxide gas is bubbled through acidified potassium chromate(VI).

State the change in oxidation number in any ONE identified reagent in the reaction.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 2(a)Referring to Figure 1, explain why the chemical reaction occurring in batteries is described as a redox reaction.[2 marks]
  2. 2(b)(i)Write the balanced ionic equation for the reaction that occurs, given the half-equations: SO₂(g) + 2H₂O(l) → SO₄²⁻(aq) + 2e⁻ + 4H⁺(aq) Cr₂O₇²⁻(aq) + 6e⁻ + 14H⁺…[2 marks]
  3. 2(c)Select THREE named elements and describe an experiment, including observations, to show how the elements selected can be listed in order of oxidizing or…[4 marks]

More practice: the rest of this paper · more Redox Reactions questions · all CAPE Chemistry Unit 1 past papers