Question

Which one of the following methods is most suitable for preparing deionized water?

Options

• Calgon's method

• Clark's method

• Synthetic resin method

• Permutit method

Answer 1

Synthetic resin method

Explanation:

The most effective way for creating deionized water is the synthetic resin method, which is more effective than the zeolite procedure. Water is sequentially passed through cation exchange and anion exchange resins to produce pure deionized water that is devoid of all soluble mineral salts. Here H⁺ exchanges for Na⁺, Ca²⁺, Mg²⁺ and other cations while OH^- exchanges for anions like Cl^-, `"SO"_4^(2-)`, `"HCO"_3^-` present in water.