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 do you observe when Washing soda is exposed to air ?
Define the Hard water.
Temporary hardness of water can be removed by
What do you understand by
Hard water
Differentiate between Temporary & permanent hard water with suitable examples.
Give balanced equation to show how temporary hardness enters into water.
Give reason for the following:
Hardness in temporary water can be removed by boiling, but hardness in permanent hard water cannot.
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.
