Determination of calcium present in calcium ammonium nitrate by complexometric titration
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The present analysis is concerned with the determination of Ca by the use of a complexometric titration of the type that is described above. The titration is performed by adding a standard solution of EDTA to the sample containing the Ca. The reaction that takes place is the following:
Ca2+ + Y4- <===> CaY2-
Before the equivalence point, the Ca2+concentration is nearly equal to the amount of unchelated (unreacted) calcium since the dissociation of the chelate is slight. At the equivalence point and beyond, pCa is determined from the dissociation of the chelate at the given pH
Ca2+ + Y4- <===> CaY2-
Before the equivalence point, the Ca2+concentration is nearly equal to the amount of unchelated (unreacted) calcium since the dissociation of the chelate is slight. At the equivalence point and beyond, pCa is determined from the dissociation of the chelate at the given pH
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