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Water - Solubility - Ions

Flame Tests.

Some metal ions can be identified by the colour of their flame
during a flame test.
Metals or metal salts having a coloured flame are used in fireworks.

A flame test uses a piece of nichrome wire.
You dip the end of the wire in concentrated hydrochloric acid
and then hold it in a hot bunsen flame.
If the wire is not contaminated, the colour of the flame will not change.

If the flame changes colour, dip the wire in
concentrated hydrochloric acid again and return it to the bunsen flame.
Repeat this procedure until the wire shows no change of colour in the flame.

Now dip the end of the wire in concentrated hydrochloric acid
and put the wire into the solid which you are using for the flame test.
A small amount of the metal chloride will form on the wire.
Hold the wire in the flame and see what colour is produced.
The table below shows which colours are produced by some metal ions.

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