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This document outlines a procedure to determine the amount of residual chlorine in water samples according to a standard method. [1] Living microorganisms in drinking water are harmful and chlorination is used to control them, but excess chlorine is also undesirable. [2] The procedure titrates a water sample with potassium iodide and sodium thiosulfate to quantify the free chlorine present through oxidation of iodide to iodine. [3] The amount of thiosulfate consumed corresponds to the chlorine concentration

Author

mkiop

Language

EN