June 2016
Beginner to intermediate
800 pages
22h 19m
English
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3
ESTIMATION OF COPPER BY EDTA METHOD
AIM
To estimate the amount of copper present in 100 ml of the given solution using approximately 0.01 M ethylenediamine tetraacetic acid (EDTA) solution.
PRINCIPLE
The estimation is based on complexometric titration. Copper ions in ammonia solution form a blue colour complex with Fast Sulphon Black-F (FSB-F) indicator. EDTA reacts with the copper ions and releases the free indicator; hence, the colour of the solution changes from blue to dark green.
PROCEDURE
Part A: Preparation of Standard Copper Sulphate Solution
Take approximately 0.25 g of copper sulphate crystals in a clean and dry weighing bottle. Weigh ...
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