Tests for Cations Flashcards
1
Q
What forms when you add sodium hydroxide to a calcium ion?
A
A white precipitate
2
Q
What forms when you add sodium hydroxide to a magnesium ion?
A
A white precipitate
3
Q
What forms when sodium hydroxide is added to an aluminium ion?
A
A white precipitate
4
Q
What happens when excess sodium hydroxide is added to a solution with a white alumninium precipitate?
A
The aluminium precipitate redissolves
5
Q
What forms when sodium hydroxide is added to a copper(II) ion?
A
A blue precipitate forms
6
Q
What forms when sodium hydroxide is added to an iron(II) ion?
A
A green precipitate
7
Q
What forms when sodium hydroxide is added to an iron(II) ion?
A
A brown precipitate forms
8
Q
Which ions form coloured compounds?
A
The transition metals
(copper (II), iron(II) and iron (III))
