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determination of chloride ion concentration by titration (volhard’s method) 1 determination of chloride ion concentration by titration (volhard’s method) introduction this method uses a back titration with potassium thiocyanate to determine the concentration of chloride ions in a solution. before the titration an excess volume
the well known mohr’s method in which alkaline or alkaline earth chlorides react with silver nitrate in the presence of a few drops of potassium chromate solution as indicator is a simple direct and accurate method for chloride determination. in this experiment the amount of chloride in an unknown sample was determined by mohr titration.
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the purpose of this experiment is to compare two titrimetric methods for the analysis of chloride in a water-soluble solid. the two methods are: • a weight titration method using a chemical indicator; • a volumetric titration method using potentiometric detection. the most important difference between the methods is how the endpoint is
the mohr method for determination of chloride in water is a ph sophisticated method. it must be perform between the ph levels 6.5-9.0. it is better to carry out between the ph ranges 7-8. at upper ph level the silver ions react with hydroxide ions and precipitated as silver hydroxide.
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method 9253 chloride (titrimetric silver nitrate) 1.0 scope and application 1.1 this method is intended primarily for oxygen bomb combustates or other waters where the chloride content is 5 mg/l or more and where interference s such as color or high concentrations of heavy metal ions render method 9252 impracticable. 2.0 summary of method
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