Flame testing metal Flashcards
1
Q
How do you do a flame test
A
placing wire with metal on into flame
2
Q
what colour does Lithium ions give off
A
crimson
3
Q
what colour does sodium ions give off
A
yellow
4
Q
what colour do potassium ions give off
A
lilac
5
Q
what colour do copper ions give off
A
green
6
Q
what colour do calcium ions give off
A
orange/red
7
Q
what are the disadvantages to normal flame tests
A
some metal ions give off similar colours
they cant do multiple ions at once
they need alot of sample for a visable flame
require several repeats for accuracy
8
Q
what is the other method for flame tests
A
instrumental method - flame emission spectroscopy
9
Q
what are the benefits to the instrumental methods
A
it is quicker
more accurate
detects smaller amounts
distinguishes individual metal ions in mixture
