Advertisements
Advertisements
प्रश्न
Give balanced equations to show how permanent hardness in water can be removed by addition of washing soda.
Advertisements
उत्तर
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
संबंधित प्रश्न
Give reason for It is difficult to cook in hills compared to plain.
Give two examples of hydrated substances.
What do you observe when Washing soda is exposed to air ?
Suggest one method for the removal along with the reaction for permanent hardness of water.
Name three water borne diseases.
Boiling removes the ................ hardness of water.
What are the advantages of hard water.
Differentiate between Temporary & permanent hard water with suitable examples.
Explain the meaning of the terms – hard water & soft water.
Temporary hardness of water can be removed by ________ of water.
