Chemical Analysis in GCSE Chemistry

Flashcards covering key concepts of chemical tests and analysis for GCSE Chemistry.

What flame color indicates the presence of lithium?

Crimson flame.

What flame test result is indicative of sodium?

Yellow/orange flame.

How can potassium be identified in a flame test?

Lilac flame.

What is the result when testing for calcium using a flame test?

Brick-red flame.

What flame color do we observe when testing copper(II)?

Blue-green/green-blue flame.

What is the result for iron(II) when sodium hydroxide solution is added?

Green precipitate.

What precipitate is formed when iron(III) is tested with sodium hydroxide?

Red-brown precipitate.

What result indicates the presence of zinc when sodium hydroxide or ammonia is added?

White precipitate which dissolves in excess ammonia solution.

What precipitate is formed when testing for chloride ions?

White precipitate with silver nitrate solution.

What test should be used to identify sulfate ions?

Add barium chloride solution.

How do you test for carbonates?

Add dilute acid to the solid and test the gas with limewater; it should turn milky.

What color precipitate indicates the presence of bromide ions?

Cream precipitate.

What is the result for iodide ions when tested with silver nitrate?

Yellow precipitate.

What happens when dilute acid is added to a carbonate?

It produces carbon dioxide gas which turns limewater milky.