Write equations for the reactions of

(ii) calcium and potassium with water



(ii) Calcium and Potassium with water



Calcium reacts with cold water to form Calcium Hydroxide and Hydrogen gas .

  • Heat formed in this reaction is less violent and does not produce sufficient heat for hydrogen gas to catch fire.
  • The piece of Calcium metal floats in water , because bubbles of hydrogen gas formed in the reaction, stick to the surface.



Potassium reacts violently with cold water to form Potassium Hydroxide , Hydrogen Gas and heat energy. 

  • The reaction is very exothermic and produces large amounts of heat.
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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo