Need to make a 0.05 or 0.5M EDTA stock solution

[Genecks]

So, I'm starting to notice that EDTA is really annoying to make a solution from. I would like to make a 0.5M stock solution of EDTA, but all I have is EDTA disodium salt. I'm reading that's basically EDTA but more readily soluble. Another thing I keep reading is that I'll have to adjust the pH of the EDTA disodium salt solution in order to make the molecules more soluble, because I keep getting precipitates at the moment. I'm not sure if I can avoid changing the pH or not. If I have to change the pH, then 7.4 would probably be good and in line with the other Tris-HCl 7.4 pH solution I've made.

Edited April 5, 2012 by Genecks

[hypervalent_iodine]

I'm not sure I see a question in there. Is there something you needed clarifying?

[Genecks]

How do I get EDTA disodium salt to dissolve and be a pH of 7.4. I tried a 0.5M solution, but couldn't get it to dissolve at that amount. So, I tried 0.1 M at 7.4, and it worked ok enough for me to get a 50 mL soltuion.