Write the equation of chemical reaction taking place when hard water containing calcium chloride is passed through permutit.

When hard water containing calcium chloride (CaCl₂) is passed through permutit, a chemical reaction occurs that softens the water by removing calcium ions. The equation for this reaction can be represented as follows:

Chemical Reaction Equation

The overall reaction can be simplified to:

CaCl₂ + Na₂Z → CaZ + 2NaCl

Where:

• CaCl₂ represents calcium chloride in hard water.
• Na₂Z denotes the sodium form of permutit.
• CaZ is the calcium form of permutit after the reaction.
• NaCl is sodium chloride, which is formed as a byproduct.

This process effectively reduces the hardness of the water by exchanging calcium ions for sodium ions, making the water softer and more suitable for various uses.