CHM 131 Lab 16 Testing for Cations and Anions

Silver nitrate and nitric acid are used to test for....

• metals

• noble gases

• halogens

• metal oxides

A white precipitate formed when an unknown solution is added to silver nitrate and nitric acid indicates the presence of which ion?

• bromide

• iodide

• fluoride

• chloride

A gas produced when hydrochloric acid is added to an unknown solution indicates the presence of....

• suulfate

• carbonate

• phosphate

• nitrate

If a precipitate remains when nitric acid is added to a white precipitate, it indicates the presence of...

• sulfate

• phosphate

• nitrate

• carbonate

If a yellow precipitate remains when ammonium molybdate is added to a solution, it indicates the presence of...

• sulfate

• phosphate

• nitrate

• carbonate

Potassium thiocyanate added to an orange-brown precipitate will form a blood red precipitate if which ion is present?

• iron(II)

• barium

• lead

• iron(III)

Which metal produces a brick red flame?

• barium

• calcium

• sodium

• potassium

Which metal produces a yellow flame?

• barium

• calcium

• sodium

• potassium

Which metal produces a purple flame?

• barium

• calcium

• sodium

• potassium

What was the salt in your unknown solution?

• potassium sulfate

• ammonium carbonate

• potassium chloride

• ammonium chloride