Chemistry
Complete and balance the equations:
| Hard and Soft water | |
|---|---|
| a. Formation of temporary hard water | CaCO3 + H2O + CO2 ⟶ …………… MgCO3 + H2O + CO2 ⟶ …………… |
| b. Removal of temporary hardness in water - by boiling | Ca(HCO3)2 ⟶ …………… ↓ + …………… + …………… [g] Mg(HCO3)2 ⟶ …………… ↓ + …………… + …………… [g] |
| c. Removal of temporary hardness in water - by addition of washing soda [Na2CO3] | Na2CO3 + Ca(HCO3)2 ⟶ …………… ↓ + …………… |
| d. Removal of permanent hardness in water - by addition of washing soda [Na2CO3] | Na2CO3 + CaSO4 ⟶ …………… ↓ + …………… |
Water
171 Likes
Answer
| Hard and Soft water | |
|---|---|
| a. Formation of temporary hard water | CaCO3 + H2O + CO2 ⟶ Ca(HCO3)2 MgCO3 + H2O + CO2 ⟶ Mg(HCO3)2 |
| b. Removal of temporary hardness in water - by boiling | Ca(HCO3)2 ⟶ CaCO3 ↓ + H2O + CO2 [g] Mg(HCO3)2 ⟶ MgCO3 ↓ + H2O + CO2 [g] |
| c. Removal of temporary hardness in water - by addition of washing soda [Na2CO3] | Na2CO3 + Ca(HCO3)2 ⟶ CaCO3 ↓ + 2NaHCO3 |
| d. Removal of permanent hardness in water - by addition of washing soda [Na2CO3] | Na2CO3 + CaSO4 ⟶ CaCO3 ↓ + Na2SO4 |
Answered By
94 Likes
Related Questions
Name one substance which is 'deliquescent'.
How does an increase in temperature affect :
(i) the solubility of NaCl
(ii) the solubility of CaSO4 in water ?Give reasons for the following :
(i) table salt becomes moist and sticky during the rainy season.
(ii) a white powder forms on the surface of washing soda crystals which are left exposed to the air.
Why is anhydrous CaCl2 used in a desiccator. Name one substance which is 'efflorescent'.