Quelpr
2 marksRedox Reactions

CAPE Chemistry Unit 1 · 2013 · Paper 2 · Question 1(b)(iii)

An acidified solution of potassium manganate(VII) is added to hydrogen peroxide, resulting in a redox reaction with effervescence and a colour change.

State the roles of the two reagents, potassium manganate(VII) and hydrogen peroxide.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 1(a)(i)Define the term oxidation.[2 marks]
  2. 1(a)(ii)Define the term reduction.[2 marks]
  3. 1(b)(i)State the colour change observed.[1 mark]
  4. 1(b)(ii)Write the TWO half equations for the reaction, indicating the changes in oxidation number.[6 marks]
  5. 1(c)Describe an experiment, including observations, that can be used to compare the oxidizing ability of the elements chlorine, bromine and iodine.[4 marks]

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