Qualitative analysis Flashcards
What colour flame does sodium produce?
Yellow
What colour flame does lithium produce?
Red
What colour flame does potassium produce?
Lilac
What colour flame does calcium produce?
Orange-red
What colour flame does copper produce?
Blue-green
What are the advantages of flame photometry?
- Greater sensitivity
- Greater accuracy
- Faster speeds
What is the precipitate colour of aluminium?
White —> Colourless
What is the precipitate colour of calcium?
White
What is the precipitate colour of copper?
Blue
What is the precipitate colour of iron(II)?
Dark green
What is the precipitate colour of iron(III)?
Brown
What solution do you add to find a metal cation?
Sodium hydroxide
How do you test for ammonia gas?
Add sodium hydroxide and gently heat
What is the positive result for ammonium ions?
Ammonia gas is created and damp red litmus paper turns blue
How do you test for carbonate anions?
Add dilute hydrochloric acid