Chemical Tests

Which test would you use to identify halide ions?

• Test with silver nitrade solution

• Flame test

• Test with Iodine solution

• Test with Iron Wool

What is the first step to test for halide ions?

• Add a few drops of dilute nitric acid to the sample

• Light a splint

• Observe the colour of any precipitates formed

• Add a few drops of dilute silver nitrade solution

What is the second step to test for halide ions?

• Add a few drops of dilute nitric acid to the sample

• Light a splint

• Observe the colour of any precipitates formed

• Add a few drops of dilute silver nitrade solution

What is the third step to test for halide ions?

• Add a few drops of dilute nitric acid to the sample

• Light a splint

• Observe the colour of any precipitates formed

• Add a few drops of dilute silver nitrade solution

Why is dilute nitirc acid used before using silver nitrade in a halide test?

• To react with any carbonate ions present because they give the same white precipitate as Chloride ions.

• To prevent reaction with any carbonate ions present

• It will only react with iodide ions present

• It cleans the surface

Which precipitate colour will identify Chloride during a halide ion test?

• Yellow precipitate

• Cream precipitate

• White precipitate

• Orange precipitate

Which precipitate colour will identify Bromide during a halide ion test?

• Yellow precipitate

• Cream precipitate

• White precipitate

• Orange precipitate

Which precipitate colour will identify Iodide during a halide ion test?

• Yellow precipitate

• Cream precipitate

• White precipitate

• Orange precipitate

Which test would be applied to test for Hydrogen gas?

• A bunsen burner flame

• A lighted splint

• Iron Wool

• Slilver Nitride

What is the first step in the process of testing for hydrogen gas?

• Place a lighted splint into a testube

• Collect some gas in an upturned test tube

• Listen out for a squeaky pop

• Check the colour of the flame