Quelpr
2 marksAcids, Bases and Salts

CSEC Chemistry · May/June 2010 · Paper 2 · Question 4(a)(ii)

A pink solution of aqueous acidified potassium manganate(VII) is decolourised by the addition of ferrous(Fe²⁺) ions. The chemical equation for the reaction is MnO₄⁻(aq) + 5 Fe²⁺(aq) + 8 H⁺(aq) → Mn²⁺(aq) + 5 Fe³⁺(aq) + 4 H₂O.

Iron(II) oxide reacts with dilute sulphuric acid to give a pale green solution. Write the equation for the reaction between iron(II) oxide and dilute sulphuric acid.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 4(a)(i)Identify the oxidizing and reducing agents in the equation, and explain your answer.[4 marks]
  2. 4(a)(iii)State whether the reaction in (ii) above is acid-base or redox, and explain your answer.[3 marks]
  3. 4(b)(i)What is meant by 'fermentation,' as it relates to the manufacture of rum?[2 marks]
  4. 4(b)(ii)Write the equation for the fermentation process defined in (i).[2 marks]
  5. 4(b)(iii)Suggest ONE material that could be used to produce wine by fermentation, and give a reason for your suggestion.[2 marks]

More practice: the rest of this paper · more Acids, Bases and Salts questions · all CSEC Chemistry past papers