Topic 9 - Separate Chemistry 2
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In the flame test, what flame does lithium give?
Red
In the flame test, what flame does calcium give?
Orange-red
In the flame test, what flame does sodium give?
Yellow
In the flame test, what flame does potassium give?
Lilac
In the flame test, what flame does copper give?
Blue-green
In the flame test, what metal gives the red flame?
Lithium
In the flame test, what metal gives the orange-red flame?
Calcium
In the flame test, what metal gives the yellow flame?
Sodium
In the flame test, what metal gives the blue flame?
Copper
In the flame test, what metal gives the purple colour?
Potassium
How do you carry out a flame test?
Clean a wire loop with hydrochloric acid and then rinse it with distilled water Then dip the loop into a sample of a metal compound and put it into a bunsen and record the colour
What do metal ions form with sodium hydroxide?
A coloured precipitate
What are metal ions mixed with to form a coloured precipitate?
Sodium hydroxide (NaOH)
How do you test metals for coloured precipitates?
Add a few drops of sodium hydroxide
What colour preciptate is formed when aluminium is added?
White
When NaOH is in excess, what precipitate is formed when added to aluminium?
Colourless
Why does NaOH is in excess and aluminium form the colourless solution?
Because the aluminum hydroxide is redissolved
What colour is formed when calcium is added to sodium hydroxide?
White
What metal forms white when it’s added to sodium hydroxide?
Aluminium or Calcium
What colour is formed when copper is added to sodium hydroxide?
Blue
What metal forms blue when added to sodium hydroxide?
Copper
What colour is formed when iron(ii) is added to sodium hydroxide?
Green
What metal forms green when added to sodium hydroxide?
Iron(ii)
What colour is formed when iron(iii) is added to sodium hydroxide?
Brown