Leaving Cert LC Tests for Anions

Iron (II) sulphate is added to a test tube containing nitrate ions. What is observed?

• Brown ring between the layers

• Yellow precipitate

• A silver mirror formed on test tube

• White precipitate

What is added to a solution to test for the presence of sulfate/sulfite ions?

• Silver nitrate

• Barium Chloride

• Hopes and dreams

• Iron (II) sulfate

In an qualitative analysis of a solution a white precipitate formed indicating the presence of sulfate/sulfite ions. HCl was added and the white precipitate disappeared. This indicates the presence of:

• Sulfate ions

• Sulfite Ions

• A lack of revision on my part

Which of the following would form a white precipitate if Barium Chloride was added to it:

• Sodium sulfate

• Sodium chloride

• Silver nitrate

• Sodium Carbonate

A few drops of were added to a test tube containing chloride ions forming a white precipitate.

• Barium Chloride

• Silver nitrate

• Hydrochloric acid

• Iron (II) sulfate

In a test for carbonate/hydrogencarbonate ions was added and fizzing occured.

• HCl

• H₂SO₄

• Ammonia

• Barium Chloride

During the test for carbonate/hydrogencarbonate ions fizzing occurs. This gas is bubbled through

• Silver nitrate

• Lime water

• Lime juice

• 7 up

During the test for carbonate/hydrogencarbonate ions a positive result is that lime water turns milky. Magnesium sulfate is added to this lime water to distinguish. If the solution contains carbonate ions then

• The solution forms a white precipitate

• The solution turns colourless

• The solution turns yellow

• The solution shows a brisk effervescence

You would add Ammonium Molybdate to a solution if you were testing for the presence of ions

• Nitrate

• Phosphate

• Carbonate

• Chloride

During a test for phosphate ions, Ammonium Molybdate was added to said solution. A positive indication of the presence of phosphate ions is indicated by:

• A milky colour

• A white precipitate and fizzing

• A yellow precipitate formed

• A brown ring at the junction between the two solutions