testing for positive ions Flashcards
1
Q
what does a crimson flame mean
A
lithium ions
2
Q
what does a yellow flame mean
A
sodium ions
3
Q
what does a lilac flame mean
A
potassium ions
4
Q
what does a orange/red flame mean
A
calcium ions
5
Q
what does a green flame mean
A
copper ions
6
Q
when adding sodium hydroxide solution, what does a white precipitate mean?
A
calcium ions : flame test
magnesium ions : flame test
aluminium ions - will dissolve in excess naoh
7
Q
when adding sodium hydroxide solution, what does a blue precipitate mean?
A
copper ions
8
Q
when adding sodium hydroxide solution, what does a green precipitate mean?
A
iron (||) ions
9
Q
when adding sodium hydroxide solution, what does a brown precipitate mean?
A
iron (|||) ions
