Question

how to remove hardness from water permanent and Temporary both ????chemistry question class 8 ICSE​

Answer 1

Answer:

Borax is usually used to reduce the alkalinity of soap solution rather than to soften water. (c) Removal of Permanent Hardness by the Base-Exchange Process: Base exchange process' is a chemical method by which, softening of permanent hardness in water can be done on a large scale or for household purposes.

Explanation:

Answer 2

Explanation:

Removing hardness from permanent water:::

♥ By adding washing soda::

CaCl2 + Na2C03 ----> CaC03 + 2NaCl

MgSO4 + Na2CO3 -----> MgC03 + Na2S04

♥ Ion exchange method::

ions responsible for hardness are exchanged with ions which do not cause precipitation

Removing hardness of temporary water:::

Chemical process of boiling water

♥ temporary hardness of water can be easily removed by boiling of water

Ca(HC03)2 ----> CaC03 + H20 + C02

here CaC03 is a precipitate

hope it helps u......❣️