I boiled a solution of NH2NO3 and urea that I got from an instant cold pack in water for a long time and at around 5C, a lot of white solid
crystallised out of the water. I'm not fully sure that the urea is gone though. Carbonyl groups significantly lower the basicity of amino groups
attached to them but since theres 2 amino groups in urea would it still be basic enough to be able to identify it by checking the pH? Magpie - 3-12-2010 at 10:43
According to Baker MSDSs pH for NH4NO3 is 5.4 and that for urea is 7.2.
What was the pH before and after the crystal removal? cnidocyte - 3-12-2010 at 11:23
Forgot to test the pH before, its at about 6 now. Definitely below 7. This isn't a good way to test for urea, I thought urea would be a lot more basic
than that. entropy51 - 3-12-2010 at 12:22
Berthelot's reaction using alkaline hypochlorite and phenol gives a blue color with urea. It may be too sensitive for your purposes, however.Paddywhacker - 3-12-2010 at 21:05
You may have urea nitrate.TheOrbit - 4-12-2010 at 06:40
i know u can check for urea by buiret test "on solid "
