In the titration of MgSO4.2H2O (2g per litre) against a 0.01 M solution of the disodium salt of ethylenediamine tetraacetic acid (EDTA) the titres obtained were as follows ;  titre 1: start - 0.7 ml and end - 13.3 ml (12.6ml) titre 2: start - 13.3 ml and end 25.7 ml (12.4ml)  The average titre is 12.5ml  Q. Calculate, based on the average titre of the accurate titres, the percentage of magnesium in the magnesium salt

Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
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Chapter16: Applications Of Neutralization Titrations
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Problem 16.20QAP
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In the titration of MgSO4.2H2O (2g per litre) against a 0.01 M solution of the disodium salt of ethylenediamine tetraacetic acid (EDTA) the titres obtained were as follows ; 

titre 1: start - 0.7 ml and end - 13.3 ml (12.6ml)

titre 2: start - 13.3 ml and end 25.7 ml (12.4ml) 

The average titre is 12.5ml 

Q. Calculate, based on the average titre of the accurate titres, the percentage of magnesium in the magnesium salt

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