PERCENT ACTIVE CHLORINE

Chlorine Water Chlorine Safety What Is Chlorine Used For Chlorine Facts Chlorine Tablets Chlorine Bleach Active Results 3 Inch Chlorine Tablets




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Percent active chlorine


Percent active chlorine is a unit of concentration used for hypochlorite-based bleaches. One gram of a 100% active chlorine bleach has the same bleaching power as one gram of chlorine. The term "active chlorine" is used because most commercial bleaches contain substantial amounts of chlorine in the form of chloride ions, which have no bleaching properties.

Liquid bleaches sold for domestic use are typically 3–10% active chlorine, and should be diluted to 1–2% active chlorine before use. Commercial domestic bleaching powder is typically about 40% active chlorine. Values for some industrial solid bleaches are given in the table below.

Formula Active chlorine
Cl2 100.0%
NaClO·2½H2O 59.3%
Ca(ClO)2 99.2%
LiClO 121.4%

Values can be higher than 100% because hypochlorite ion have higher oxidation state (+1) than chlorine(0) and so high oxidation power .
Percent active chlorine values have now virtually replaced the older system of molar mass of 58.39 g/mol, equivalent to 17.1 mol/kg or 121% active chlorine.

Active chlorine values are usually determined by adding an excess of potassium iodide to a sample of bleach solution and titrating the iodine liberated with standard sodium thiosulfate solution.

Cl2 + 2I → I2 + 2Cl

or

ClO + 2I + 2 H+ → I2 + H2O + Cl

then

2S2O32− + I2 → S4O62− + 2I

From the above equations it can be seen that 2 mole of thiosulfate is equivalent to 70.9 grams of active chlorine.




Chlorine Water Chlorine Safety What Is Chlorine Used For Chlorine Facts Chlorine Tablets Chlorine Bleach Active Results 3 Inch Chlorine Tablets

| Chlorine Water | Chlorine Safety | What Is Chlorine Used For | Chlorine Facts | Chlorine Tablets | Chlorine Bleach | Active Results | 3 Inch Chlorine Tablets | Percent_active_chlorine | Chlorine_bleach | Water_purification | Ozone_depletion | Halogen | Union_Pacific_Railroad | Chemical_weapons_in_World_War_I | Motion_capture | Radiometric_dating | Chemical_warfare | Polychlorinated_biphenyl | Montreal_Protocol | Isolation_tank | Vapor-compression_refrigeration | Composition_of_the_human_body | Soil | Sewage_treatment | Schindler_Elevator_Corporation | Portland_Water_Bureau | Common_octopus | Low_carbon_diet | Marc_Edwards_(civil_engineering_professor) | Historical_mortality_rates_of_puerperal_fever | Ion-exchange_resin | Cosmic_ray | Hafnium_tetrachloride | 2012_in_science | Gastric_acid | Iodine | Lunae_Palus_quadrangle | Cebrenia_quadrangle | Hydrochloric_acid | Lithium_chloride | Air_freshener | List_of_brazing_alloys | Oral_rehydration_therapy | Atrazine_chlorohydrolase | Oceana_(non-profit_group) | Seawater | Islamic_State_of_Iraq_and_the_Levant | Iodine-131 | Smartphone | Lysergic_acid_diethylamide | Environmental_impact_of_hydraulic_fracturing_in_the_United_States | Military_history_of_Canada_during_World_War_I | Water_supply_and_sanitation_in_the_United_States | Syracuse,_New_York | Hygiene | Economy_of_the_Chuvash_Republic | Chemical_weapon_proliferation

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Dieser Artikel basiert auf dem Artikel http://en.wikipedia.org/wiki/Percent_active_chlorine aus der freien Enzyklopaedie http://en.wikipedia.org bzw. http://www.wikipedia.org und steht unter der Doppellizenz GNU-Lizenz fuer freie Dokumentation und Creative Commons CC-BY-SA 3.0 Unported. In der Wikipedia ist eine Liste der Autoren unter http://en.wikipedia.org/w/index.php?title=Percent_active_chlorine&action=history verfuegbar. Alle Angaben ohne Gewähr.

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