flame tests

Question 1

how to carry out flame tests

Answer 1

1. place small amount onto wire mounted in a handle
2. place end of this into a blue bunsen burner flame
3. colour of flame will show ion present

Question 2

what colour will lithium turn

Answer 2

crimson

Question 3

what colour will sodium turn

Answer 3

yellow

Question 4

what colour will potassium turn

Answer 4

lilac

Question 5

what colour will calcium turn

Answer 5

orange-red

Question 6

what colour will copper turn

Answer 6

green

Question 7

what are the problems with flame tests

Answer 7

colour can be difficult to distinguish
mixture of metal ions can mask colour of flame

Question 8

how to carry out flame emission spectroscopy

Answer 8

1. sample placed in fire
2. light given out passed into a spectroscope
3. light is converted to a light spectrum
4. positions of light are specific

Question 9

what are the advantages of instrumental methods

Answer 9

rapid
sensitive
accurate