Analytical Chemistry of Lead

Lead(II) ions in aqueous solution can be titrated with EDTA solution using xylenol orange indicator and hexamine to control the pH. They can be precipitated as chromate which may be weighed or it may be dissolved in dil. HCI, adding excess KI and titrating 

Lead forms a stable complex with EDTA. Titrations are carried out at pH6 when the colour of xylenol orange changes to yellow. 

Weigh out accurately about 4.16 g of the purest lead nitrate, dissolve it in water, add a few drops of dil. HNO3 and make up to 250 cm in a volumetric flask. 

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I. General reviews of the inorganic and analytical chemistry of lead. 

This reagent has been used frequently In the analytical chemistry of lead but the measurable solubility of the lead com-. 

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