Clark's method softens water by eliminating temporary hardness. It involves adding a strictly calculated amount of slaked lime (). What is the primary chemical risk of adding an *excess* of slaked lim

Question

Clark's method softens water by eliminating temporary hardness. It involves adding a strictly calculated amount of slaked lime ($Ca(OH)_2$). What is the primary chemical risk of adding an *excess* of slaked lime during this process?

Prashant Kotian · Accepted Answer

Correct answer: C. Clark's method depends on precise stoichiometry: . If excess is added, the unreacted, soluble ions remain in the water, ironically recreating the very hardness the process was meant to cure.

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