Determination of calcium and lead in a mixture

Calculate the temporary hardness of the water by subtracting the permanent hardness from the total hardness. [Pg.333]

The calcium content may then be determined by titration wth EDTA using either Patton and Reeder s indicator or calcon (Section 10.60), or alternatively by titration with EGTA (see Section 10.61). [Pg.333]

63 DETERMINATION OF CALCIUM IN THE PRESENCE OF BARIUM USING CDTA AS TITRANT [Pg.333]

There is an appreciable difference between the stability constants of the CDTA complexes of barium (log K = 7.99) and calcium (log K = 12.50), with the result that calcium may be titrated with CDTA in the presence of barium the stability constants of the EDTA complexes of these two metals are too close together to permit independent titration of calcium in the present of barium. [Pg.333]

The indicator calcichrome (see Section 10.48) is specific for calcium at pH 11-12 in the presence of barium. [Pg.333]

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