The difference between temporary hard water and permanent hard water is that only the former contains a significant concentration of: A) Ca²⁺ B) CO₃^2- C) HCO₃^- D) Mg²⁺ E) OH^-

Question

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Temporary hard water contains bicarbonate ions (HCO₃⁻) which can be removed by boiling, unlike permanent hard water which contains other ions like sulfates or chlorides that do not precipitate upon boiling.

The Difference Between Temporary Hard Water and Permanent Hard Water