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99854
Lithium, sodium and potassium with water
Description
AQA IGCSE Chemistry (yr 8) Mind Map on Lithium, sodium and potassium with water, created by Emma Boxley on 20/05/2013.
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chemistry
chemistry
yr 8
aqa igcse
Mind Map by
Emma Boxley
, updated more than 1 year ago
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Emma Boxley
over 11 years ago
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Resource summary
Lithium, sodium and potassium with water
Lithium
The reaction generates heat too slowly and lithium's melting point is too high for it to melt
Lithium's density is only about half that of water so it floats on the surface
It gently fizzes and gives off hydrogen
It gradually reacts and disappears
It forms a colourless solution of lithium hydroxide.
Sodium
Sodium floats on the surface of the water
Because it has a low melting point it melts
It forms a small silvery ball that dashes around the surface.
A white trail of sodium hydroxide is seen in the water under the sodium
This soon dissolves to give a colourless solution of sodium hydroxide.
Pottasium
Potassium behaves rather like sodium except that the reaction is faster
Enough heat is given off to set light to the hydrogen.
The normal hydrogen flame is contaminated by potassium compounds...
...and so is coloured lilac (a faintly bluish pink).
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