146. An EDTA solution of 1.2640 g was prepared in a volumetric flask with a capacity of 250 cm3. Determine how many milliliters of zinc sulfate solution with a molar concentration equivalent of 0.1 mol / dm3 will be used to titrate 25.05 cm3 of the resulting EDTA solution. Determine the titer of EDTA by zinc sulfate.

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