What is demineralised water? How is it obtained?
Answers
Answer:
Demineralised water is free from all soluble mineral salts. It does not contain any anions or cations. Demineralised water is obtained by passing water successively through a cation exchange (in the H+ form) and an anion exchange (in the OH– form) resin.
Answer:
Demineralised water is water completely free (or almost) of dissolved minerals as a result of one of the following processes: distillation. deionization. membrane filtration (reverse osmosis or nanofiltration)
Water which does not contain cations and anions is called demineralised water. It is obtained by passing hard water first through cation exchange resin and then through anion exchange resin. During the cation exchange process, H+ exchange for Na+, Mg2+, Ca2+ and other cations present in water.