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.

  1. Class 10
  2. Chapter 3 Class 10 - Metals and Non-Metals (Term 1)

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo