Civil Engineering > GATE 2025 SET-2 > Water Treatment
Free residual chlorine concentration in water was measured to be 2 mg/l (as Cl2). The pH of water is 8.5. By using the chemical equation given below, the HOCl concentration (in μmoles/l) in water is ______ (round off to one decimal place).
HOCl↔H++OCl-. pK=7.50
Atomic weight: Cl(35.5)
HOCl↔H++OCl-. pK=7.50
Atomic weight: Cl(35.5)
Correct : 2.1
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