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Chemistry 9 Online
OpenStudy (anonymous):

Ca(+2) ion in the 1.5 gr powdered milk as ash, titrated with 12.1 mL EDTA solution. Preparation of EDTA solution: 10 mL of 0.6920 gr pure metalic zinc solved in acid titrated with 10.8 mL EDTA.Calculate the amount of Ca(+2) in the powdered milk respect to ppm.

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