Qualitative analysis (from 0620 upload)

Which method is used to identify sulfate ions?

• Acidifying with dilute nitric acid and adding aqueous barium nitrate

• Adding silver nitrate

• Using litmus paper

• Heating the solution

How is carbon dioxide, CO₂, typically identified in a laboratory setting?

• Using a glowing splint

• Using limewater

• Using damp red litmus paper

• Using a lighted splint

What is the test for chlorine gas, Cl₂?

• Using limewater

• Using damp red litmus paper

• Using a glowing splint

• Using a lighted splint

What is the test for ammonium ions, NH₄⁺, in a solution?

• Using limewater

• Using aqueous sodium hydroxide

• Using damp red litmus paper

• Using a glowing splint

What is the test result for bromide ions (Br⁻) when acidified with dilute nitric acid and aqueous silver nitrate is added?

• White precipitate

• Cream precipitate

• Yellow precipitate

• No reaction

Which ion produces a yellow precipitate when tested with dilute nitric acid and aqueous silver nitrate?

• Chloride (Cl⁻)

• Bromide (Br⁻)

• Iodide (I⁻)

• Nitrate (NO₃⁻)

What is the result when nitrate ions (NO₃⁻) are tested with aqueous sodium hydroxide and aluminum foil?

• White precipitate

• Ammonia produced

• Effervescence

• No reaction

Which ion gives a white precipitate when acidified with dilute nitric acid and aqueous barium nitrate is added?

• Sulfate (SO₄²⁻)

• Sulfite (SO₃²⁻)

• Nitrate (NO₃⁻)

• Carbonate (CO₃²⁻)

What happens to the acidified aqueous potassium manganate(VII) when sulfite ions (SO₃²⁻) are added?

• It changes color from purple to colorless

• It forms a white precipitate

• It produces ammonia

• It remains unchanged

What is the effect of aqueous sodium hydroxide on aluminum ions (Al³⁺)?

• Green precipitate, insoluble in excess

• White precipitate, soluble in excess

• Light blue precipitate, insoluble in excess

• Red-brown precipitate, insoluble in excess