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
What is the effect on boiling point of water when pressure is increased?
Give two examples for Efflorescent substance.
Explain the permutit method for softening hard water.
How will you distinguish between soft water and hard water?
Give balanced equation to show how temporary hardness enters into water.
Give balanced equation to show how temporary hardness in water can be removed by boiling.
Give reason for the following:
Washing soda can be used to remove both temporary and permanent hardness in water.
Fill in the blank:
Hard and soft water can be distinguished using _____.
Explain the meaning of the terms – hard water & soft water.
Name the process by which temporary hardness is easily removed from the water.
