Oxidation-Reduction Reactions Past Paper Question (2012)
Experiment 3 involved reactions between a colorless unknown
Solution X and three aqueous solutions, iron(II) nitrate, acidified
potassium manganate(VII) and potassium iodide. Two of the three
observations made are recorded in Table 2.
TARIF 2. REACTIONS OF SOLUTION Y
Reactions of Solution X
Aqueous Iron(II) Nitrate
Acidified Potassium
Manganate(VII)
Aqueous Potassium Iodide
Observation 3
The solution changes from pale
green to pale yellow
The solution changes from
purple to colourless.
Use the data in Table 2 to answer the following questions.
Write a balanced half-equation to represent the change which
takes place when Solution X reacts with aqueous iron(II) nitrate.
(2 marks)
Explain whether Solution X is behaving as a reducing agent, an