Flame tests

Question 1

What is the result of the flame test for a lithium compound?

Answer 1

A CRIMSON flame

Question 2

What is the result of the flame test for a calcium compound

Answer 2

Orange-red flame

Question 3

What is the result of the flame test for a sodium compound?

Answer 3

Yellow flame

Question 4

What is the result of the flame test for a copper compound?

Answer 4

A green flame

Question 5

What is the result of the flame test for a potassium compound?

Answer 5

Lilac flame

Question 6

Name an instrumental method of detecting elementsa dn compounds

Answer 6

Flame emission spectroscopy

Question 7

What are the advantages of using intrumental methods like flame emission spectroscopy?

Answer 7

They are:
Rapid
Accurate
Sensetive

Question 8

What are the disadvantages of using flame tests to detect a metal ion?

Answer 8

It can be difficult to distinguish the colour of the flame, especially when the concentration of the metal ion is low

The sample may have a mixture of different metal ions and some flame colours may be masked by the colours of other ions