Question

principal involved in limit test of lead?​

Answer 1

Answer:

Principle: The limit test for lead is based on the reaction between lead and diphenylthiocarbazone (dithizone) in an alkaline medium to form lead–dithizonate complex. The lead present as an impurity in the substance is separated by extracting an alkaline solution with dithizone extraction solution.

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Answer 2

Answer:

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