Saved Bookmarks
| 1. |
Explain the washing soda method for removal of permanent hardness of water. |
|
Answer» Washing soda reacts with soluble chloride and sulphates of calcium and magnesium present in hard water of from insoluble carbonates which can be removed by filtration CaCl2+Na2CO3→CaCO3↓2NaCl MgCl2+Na2CO3→MgCO3↓+2NaCl CaSO4+Na2CO3→CaCO3↓+Na2SO4 MgSO4+Na2CO3→MgCO3↓+Na2SO4 |
|