5. What sample of sodium oxalate is required to be taken so that 25.00 ml of 0.02 N is used for titration. potassium permanganate solution? What is the titer of a substance? What is the titer of one substance over another substance? For example, what is the iodine thiosulfate titer? What is the physical meaning of each of the titles (disassemble with examples)? In what cases is it more convenient to use the second title?

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