Question | Answer |
What is the flame colour for potassium? | Lilac |
What is the flame colour for calcium? | Red |
What is the flame colour for lithium? | Crimson |
What is the flame colour for sodium? | Yellow |
what is the flame colour for Barium? | Green |
Which ions give a white precipitate when reacted with sodium hydroxide? | Aluminium, calcium, magnesium |
Which of the previous ion re-dissolves in excess sodium hydroxide? | Aluminium |
What is the colour of copper's precipitate? | Blue |
What clour is Fe(II)'s precipitate? | Green |
What colour is Fe(III)'s precipitate? | Brown |
How do we test for halide ions? | Add Silver nitrate solution with nitric acid. |
What colour is a chloride precipitation? | White |
What colour is a bromide precipitation? | Cream |
What colour is an iodide precipitation? | Yellow |
What is the test for sulphate ions? | add barium chloride and dilute hydrochloric acid (white precipitation in the presence of sulphate ions) |
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