reaction with cold water and steam

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10 Terms

1
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potassium (cold water)

  • reacts explosively

  • darts around and sizzles on the surface of water

  • effervescence of a colourless odourless gas that extinguishes a lighted spring with ‘pop’ sound

2
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sodium (cold water)

  • reacts violently

  • darts around and sizzles on surface of water

  • effervescence of a colourless odourless gas that extinguishes lighted splint with ‘pop’ sound

3
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calcium (cold water)

  • reacts readily

  • darts around and sizzles on surface of water

  • effervescence of a colourless odourless gas that extinguishes lighted splint with ‘pop’ sound

4
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magnesium (cold water)

  • very slow reaction

  • few bubbles of colourless odourless gas the extinguishes a lighted splint with a ‘pop’ sound

5
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copper, silver, zinc, lead, iron

no reaction. rusting occurs for iron due to presence of air and water

6
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potassium, sodium, calcium (steam)

reactions are too explosive

7
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magnesium (steam)

hot Mg reacts violently with steam

bright while glow produced, white powder (MgO) produced

8
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zinc (steam)

hot grey zinc reacts readily in steam to form yellow solid (ZnO) that turns white when cooled

9
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iron (steam)

red hot iron reacts slowly to form black solid (Fe3O4)

10
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lead, copper, silver (steam)

no reaction