group 1 alkali metals reactions

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9 Terms

1
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Lithium reaction with water observations

  • fizzing (effervescence)

  • moves

  • floats

  • disappears

  • vapour trail

2
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Sodium reactions in water

  • sodium melts

  • fizzes rapidly

  • forms a ball

3
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Potassium reaction with water observations

  • potassium melts and floats

  • moves around very quickly on the water surface

  • metal self ignites

  • lilac flame

4
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equation for lithium in water

2Li(s) + 2H2O(l) → 2LiOH(aq) + H2(g)

5
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what would the universal indicator colour be after lithium reacts with water

purple/blue - hydroxide

6
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equation for sodium in water

2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)

7
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what would the universal indicator colour be after sodium reacts with water

blue/purple hydroxide

8
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equation for potassium in water

2K(s) + 2H2O(l) → 2KOH(aq) + H2(g)

9
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what colour would be the universal indicator be after potassium reacts with water

purple/blue - hydroxide