Which sequence of processes accurately describes the production of pure demineralized (de-ionized) w — Hydrogen Chemistry Question

💡 Solution & Explanation

Demineralized water is obtained by first passing hard water through a cation exchange resin (which replaces cations like $Ca^{2+}, Mg^{2+}, Na^+$ with $H^+$ ions, making the water acidic), and then through an anion exchange resin (which replaces anions like $Cl^-, SO_4^{2-}$ with $OH^-$ ions). The $H^+$ and $OH^-$ ions neutralize to form pure water.