CH-1605
Tests for cations
Chemistry · Secondary 4 · Easy · Tests for cations
Aqueous iron(II) sulfate is added to excess aqueous sodium hydroxide and the mixture is left to stand in air.
Which observation is correct?
Which observation is correct?
- A green precipitate forms and remains green on standing.
- A green precipitate forms and slowly turns brown on standing.
- A brown precipitate forms and slowly turns green on standing.
- No precipitate forms, but a brown solution appears on standing.
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