Standardisation of EDTA Solution

Pipette 25.00 cm of standard 0.10 M calcium salt solution into a 250 cm conical flask. Dilute to about 100 cm and add 2 cm of the magnesium complexonate suspension (shake before use), 5 cm of the buffer solution (pH = 10) and 2-3 drops of Erochrome Black T indicator. Titrate with the approximately 0.1 M EDTA solution to a steel blue end point. Repeat to obtain concordant results. Calculate, from the average titre, the concentration of EDTA as mol dmAlternatively use accurately weighed 0.2 g purest calcium carbonate dried at 105 C, add water and dil. HCl to dissolve. Boil to expel carbon dioxide dilute to 100 cm and continue as above. 

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Potassium hydrogen phthalate Potassium hydrogen phthalate Potassium iodate Anhydrous sodium carbonate Zinc metal Standardisation of sodium hydroxide solution Standardisation of acetous perchloric acid Standardisation of sodium thiosulphate solution through generation of iodine Standardisation of hydrochloric acid Standardisation of EDTA solution... 

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