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(d) Calculate the number of moles of iron (II) ions in 1 dm of solution, R.
3
[1 mark]
(e) Calculate the number of moles of iron (II) ions in the volume of 25 cm of R.
3
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[1 mark]
(f) Calculate the number of moles of potassium manganate (VII) in 1 dm of solution.
3
[2 marks]
(g) (i) State TWO reagents that can be used in testing for the presence of Fe ions.
2+
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................................................................................................................................
................................................................................................................................
[2 marks]
(ii) Describe what should be observed when any ONE of the reagents in (g) (i) is
added to a solution containing only Fe cations.
2+
................................................................................................................................
[1 mark]
Total 15 marks
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