C8: FLAME TESTS

Question 1

Flame test method

Answer 1

-nichrome wire cleaned with concentrated HCL
-wire is dipped in sample of compound
-wire is placed in blue bunsen flame
-record colour of flame

Question 2

What is the colour of flame produced from a compound containing lithium?

Answer 2

crimson

Question 3

What is the colour of flame produced from a compound containing copper?

Answer 3

green

Question 4

What is the colour of flame produced from a compound containing sodium?

Answer 4

yellow

Question 5

What is the colour of flame produced from a compound containing potassium?

Answer 5

lilac

Question 6

What is the colour of flame produced from a compound containing calcium?

Answer 6

orange-red

Question 7

What instrumental method can be used to test for metal ions?

Answer 7

flame emission spectroscopy

Question 8

Flame emission spectroscopy method

Answer 8

-sample put into flame
-light given out passed through a spectroscope
-spectrum can be analysed to identify metal ions and measure their conc.