Qualitative Analysis Flashcards

Flashcards for GCE Ordinary Level Science syllabus on Qualitative Analysis.

What is the test result for the presence of carbonate (CO32–)?

Effervescence, carbon dioxide produced.

What is the test for carbonate (CO32–)?

Add dilute acid.

What is the test result for chloride (Cl–) in solution?

White precipitate.

What is the test for chloride (Cl–) in solution?

Acidify with dilute nitric acid, then add aqueous silver nitrate.

What is the test result for nitrate (NO3–) in solution?

Ammonia produced.

What is the test for nitrate (NO3–) in solution?

Add aqueous sodium hydroxide, then aluminium foil; warm carefully.

What is the test result for sulfate (SO42–) in solution?

White precipitate.

What is the test for sulfate (SO42–) in solution?

Acidify with dilute nitric acid, then add aqueous barium nitrate.

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

White precipitate, soluble in excess, giving a colorless solution.

What is the effect of aqueous ammonia on aluminium (Al3+)?

White precipitate, insoluble in excess.

What is the effect of aqueous sodium hydroxide on ammonium (NH4+)?

Ammonia produced on warming.

What is the effect of aqueous ammonia on calcium (Ca2+)?

No precipitate.

What is the effect of aqueous sodium hydroxide on calcium (Ca2+)?

White precipitate, insoluble in excess

What is the effect of aqueous ammonia on copper(II) (Cu2+)?

Light blue precipitate, soluble in excess, giving a dark blue solution.

What is the effect of aqueous sodium hydroxide on copper(II) (Cu2+)?

Light blue precipitate, insoluble in excess.

What is the effect of aqueous sodium hydroxide on iron(II) (Fe2+)?

Green precipitate, insoluble in excess.

What is the effect of aqueous ammonia on iron(II) (Fe2+)?

Green precipitate, insoluble in excess.

What is the effect of aqueous sodium hydroxide on iron(III) (Fe3+)?

Red-brown precipitate, insoluble in excess.

What is the effect of aqueous ammonia on iron(III) (Fe3+)?

Red-brown precipitate, insoluble in excess.

What is the effect of aqueous sodium hydroxide on zinc (Zn2+)?

White precipitate, soluble in excess, giving a colorless solution.

What is the effect of aqueous ammonia on zinc (Zn2+)?

White precipitate, soluble in excess, giving a colorless solution.

What is the test and test result for ammonia (NH3)?

Turns damp red litmus paper blue.

What is the test and test result for carbon dioxide (CO2)?

Gives white precipitate with limewater (precipitate dissolves with excess CO2).

What is the test and test result for chlorine (Cl2)?

Bleaches damp litmus paper.

What is the test and test result for hydrogen (H2)?

‘Pops’ with a lighted splint.

What is the test and test result for oxygen (O2)?

Relights a glowing splint.

What is the test and test result for sulfur dioxide (SO2)?

Turns aqueous acidified potassium manganate(VII) from purple to colorless.