Advertisements
Advertisements
Question
Give balanced equations to show how permanent hardness in water can be removed by addition of washing soda.
Advertisements
Solution
Removal of permanent hardness in water by adding washing soda : CaCl2 or CaSO4 present in permanent hard water exchanges the ions and forms CaCO3 which being in soluble can be filtered.
\[\ce{\underset{\text{Washing soda}}{Na2CO3} + \underset{\text{Present in hard work}}{CaSO4} -> CaCO3↓ + Na2SO4}\]
\[\ce{Na2CO3 + CaCl2 -> CaCO3↓ + 2NaCl}\]
APPEARS IN
RELATED QUESTIONS
Name three water borne diseases.
Boiling removes the ................ hardness of water.
State the disadvantages of using hard water.
How will you distinguish between soft water and hard water?
Differentiate between Temporary & permanent hard water with suitable examples.
Using given sample of temporary and permanent hard water, soft water, ordinary soap, detergent and washing soda how would you distinguish between hard and soft water?
Using given sample of temporary and permanent hard water, soft water, ordinary soap, detergent and washing soda how would you prove the advantage of detergent over soap.
Permanent hardness of water is due to the presence of _______.
What is permanent hardness of water? How can it be removed?
What is the reason for the hardness of water?
