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Lab 5.docx - Introduction: The chloride ion is an inorganic...

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Introduction:The chloride ion is an inorganic anion that is naturally occurring in environmental water.Sea water contains 1.94% chloride and can be commonly found in different forms such asSodium chloride, Potassium Chloride and Magnesium Chloride. Even though chloride is non-toxic to humans, high levels of chloride ions can be found affect plants and infrastructures. Dueto that reason the Environmental Protection Agency has set a standard chloride concentration indrinking water to be 250 mg/L. The goal of this experiment is to find the concentration of theNewtown creek water sample using the stoichiometry of the chemical reaction between analyteand titrant.Objectives:-To analyze and calculate the amount of chloride ions in an environment sample byprecipitation titration.-To determine the equivalence point by visual observation.-To become familiar with using pipettes and burettes for quantitativemeasurements.Materials:-Erlenmeyer flask-50mL burette-Funnel-stir bar.Chemicals:-AgNO3-Potassium chromate-Creek water containing chloride ion.
Procedure :-10 mL filtered Newton Creek water sample was placed in an Erlenmeyerflask and the pH was measured. The pH value should be in range of 7-9. Ifyour environment sample has a pH value outside this range, adjust theacidity with nitric acid or sodium hydroxide.

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Term
Fall
Professor
HeisenMidasTsai
Tags
Sodium chloride, chloride ion, Newtown Creek

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