T9 - Tutorial 9 So ([email protected]) Kin ([email protected])...

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Tutorial 9 So ( [email protected] ) Kin ([email protected])
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Chlorine Free Residual HOCl, OCl - Combined Residual NH 2 Cl, NHCl 2 , NCl 3 Total Residual =Free Residual + Combined Residual
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Chlorine as mg/L Cl 2 refers to oxidizing power of the compound tested equivalent to Chlorine Cl 2 + H 2 O <--> H +1 O -2 Cl +1 + H +1 Cl -1 Monochloramine: N -3 H 2 +1 Cl +1 Dichloramine: N -3 H +1 Cl 2 +2 Nitrogen trichloride: N -3 Cl 3 +3
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Chlorine When oxidation takes place H + + Cl - + HOCl + 2e - H 2 O + 2Cl - 2 electrons were stolen from the substance being oxidized. When Chlorine molecule becomes completely oxidized: Cl 2 + 2e - 2Cl - This gain of two electrons by definition shows that the oxidizing capacity of the HOCl is equal to one mol of Cl 2
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Chlorine Compound Mol wt. Mol of Equivalent Chlorine * Cl 2 71 1 HOCl 52.5 1 Na(OCl) 74.5 1 Ca(OCl) 2 143 2 NH 2 Cl 51.5 1 NHCl 2 86 2 NCl 3 120.5 3 * Number of mol of chlorine having an oxidizing capacity equivalent to one mol of the compound.
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Chlorine
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Chlorine Zone 1
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This note was uploaded on 09/13/2011 for the course CIVL 242 taught by Professor Gh during the Fall '09 term at HKUST.

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T9 - Tutorial 9 So ([email protected]) Kin ([email protected])...

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