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April 24, 2014

Homework Help: chemistry

Posted by darren on Wednesday, February 15, 2012 at 5:25pm.

A 0.4515 g sample of pure CaCO3 was transferred to a 500 mL volumetric flask and dissolved using 6M HCl then diluted to volume. A 50.00 mL aliquot was transferred to a 250mL Erlenmeyer flask and the pH adjusted. Calmagite was used as an indicator the solution was titrated using EDTA and required 45.05 mL to reach the endpoint. Calculate the EDTA molarity. [Answer in 4 SF].

(EDTA reacts in a 1:1 stoichiometry with Ca2+)

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