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Write equation for reactions of (1)Iron …

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Write equation for reactions of (1)Iron with steam (2) Calcium and potassium with water

Posted by Abhay Shetty 5 years, 7 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 7 months ago

(i) Iron react with steam to form the metal oxide and hydrogen.
3Fe(s) + 4H₂O(g) → Fe₃O₄(s) + 4H₂(g)
(ii) The reaction of calcium with water is exothermic but the heat evolved is not sufficient for the hydrogen to catch fire.
Ca(s) + 2H₂O(l) → Ca(OH)₂(aq) + H₂(g)
Calcium starts floating because the bubbles of hydrogen gas formed stick to the surface of the metal. Potassium react violently with cold water and its reaction is so violent and exothermic that the evolved hydrogen immediately catches fire.
2K(s) + 2H₂O(l) → 2KOH(aq) + H₂(g) + heat energy

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CBSE > Class 10 > Science