Flame Tests & Photometry (25a) Flashcards
1
Q
Use of flame tests
A
To identify metal ions in dilute solutions
2
Q
Flame test colour produced by lithium
A
Red
3
Q
Flame test colour produced by sodium
A
Yellow
4
Q
Flame test colour produced by potassium
A
Lilac
5
Q
Flame test colour produced by calcium
A
Orange-red
6
Q
Flame test colour produced by copper
A
Blue-green
7
Q
3 benefits of using machines instead of flame tests
A
- More sensitive
- More accurate
- Faster
8
Q
Use of flame photometer
A
To measure light intensity of flame colour produced
9
Q
How does flame photometer separate mixture of colours seen?
A
By producing spectrum of light emitted by each ion
10
Q
How is metal ion in unknown spectrum identified?
A
By matching its spectra to that of known metal ion
