Chemistry - Identifying Ionic Compounds - Flame Tests, Testing With Sodium Hydroxide, Sulfate Ion test, Halide Ions, Carbonate Ions

How do you carry out a flame test?

Collect a damp splint and dip it into the sample being tested.

Hold the splint in a bunsen flame and look for the colour

What colour flame does Lithium Ions produce?

Crimson Red

What colour flame does Sodium Ions produce?

Yellow

What colour flame does Potassium ions produce?

Lilac

What colour flame does Calcium Ions produce?

Orange

What colour flame does Barium Ions produce?

Green

How do You carry out the Sodium Hydroxide test?

Place solution into a test tube

Add Sodium Hydroxide solution

Look for precipitate

Add more Sodium Hydroxide solution to see if precipitate redissolves

What precipitate do Copper Ions produce? (NaOH test)

Blue

What precipitate do Iron (II) ions produce? (NaOH test)

Green

What precipitate do Iron (III) ions produce? (NaOH test)

Brown

What precipitate do Calcium Ions produce? (NaOH test)

White

What precipitate do magnesium ions produce? (NaOH test)

White

What precipitate do Aluminium ions produce? (NaOH test)

White (re-dissolves with XS)

How do you carry out the Sulfate Ion test?

Place sample into test tube

Add HCl

Add Barium Chloride solution

What is the positive result of the Sulfate Ion test?

White precipitate

How do you carry out the Halide Ions test?

Place solution into test tube

Add some dilute nitric acid

Add some silver nitrate solution

Look for precipitate

What precipitate does Chloride Ions produce? (Halide Ions test)

White

What precipitate does Bromide Ions produce? (Halide Ions test)

Cream

What precipitate does Iodide Ions produce? (Halide Ions test)

Yellow

How to carry out the Carbonate Ions test?

Add an Acid e.g HCl

If it Fizzes and Produces CO2, do the Limewater Cloudy test, then it contains Carbonate Ions