Test for Cations

Question 1

What colours do lithium, sodium, potassium, calcium and copper ions give when burnt?

Answer 1

Lithium - Crimson
Sodium - Yellow
Potassium - Lilac
Calcium - Orange red 
Copper - Green

Question 2

What do you add to a metal hydroxide to find out what the metal is?

Answer 2

Sodium hydroxide

Question 3

What are the colours of the precipitates for the metals calcium, copper(II), iron(II), iron(III), aluminium, and magnesium?

Answer 3

Calcium - White
Copper(II) - Blue
Iron(II) - Green
Iron(III) - Brown
Aluminium - White but dissolves in excess NaOH 
Magnesium - White