EDTA is of course an acid, and it is well known that preparation of 0.5M EDTA requires the addition of sodium hydroxide.
I obtained EDTA from a stock room ( 2 different bottles, 1 sealed, but both 5ish years old). Both dissolved readily in water readily, with a final pH of 11.
Anyone have any ideas as to what is going on?
I too think it might be salt form of EDTA otherwise it will not dissolve without adding NaOH.
In the market the free EDTA is available, but not as frequent reagent. The disodium salt of EDTA is more frequent. The high pH shows in its solution shows that has high OH concentration, so Alejandro and Dhiraj are probably right. Please check the MW on the bottle (if it is), that will give you fast answer.
TQ for all your answers for that informative question. But my question now is : How much should be the PH of dissolved EDTA? TQ
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