DifferenceModerate1 mark
3(b)
Distinguish between the following pairs of compounds using the reagent given in the bracket.
Ferrous sulphate solution and ferric sulphate solution. (using sodium hydroxide solution)
Topic: Qualitative analysis using NaOH and NH₄OH
Previous-year question practice database
Answer
Exam answer
FeSO₄ gives dirty-green Fe(OH)₂; Fe₂(SO₄)₃ gives reddish-brown Fe(OH)₃.
Comparison
| Ferrous sulphate | Ferric sulphate |
|---|---|
| Dirty-green precipitate. | Reddish-brown precipitate. |
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