Testing for ions

What group are the alkali metals in?

What colour flame does lithium produce?

Sodium produces an orange flame

What colour does potassium produce?

What colour flame does calcium produce?

Ammonium ions can be identified in a solution by adding dilute sodium hydroxide solution and gently heating. If ammonium ions are present, they will be converted to ammonia gas. Ammonia has a characteristic choking smell. It also turns damp red litmus paper or damp universal indicator paper blue.

When NaOH is added to Fe2+, what colour is the precipitate?

When NaOH is added to Fe3+, what colour is the precipitate?

When NaOH is added to Cu2+, the precipitate is green

When dilute NaOH is added to Zn2+, a white precipitate forms