Advertisement Remove all ads

Write Equations for the Reactions Of Calcium and Potassium with Water - Science

Advertisement Remove all ads
Advertisement Remove all ads
Advertisement Remove all ads

 Write equations for the reactions of calcium and potassium with water

Advertisement Remove all ads

Solution

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) + Heat

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

Concept: Physical Properties of Metals
  Is there an error in this question or solution?

APPEARS IN

NCERT Class 10 Science
Chapter 3 Metals and Non-metals
Q 2.2 | Page 45
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×