Thursday
May 28, 2015

Homework Help: chemistry

Posted by G on Tuesday, July 6, 2010 at 11:42pm.

thanks Dr.Bob, I got that question. I also have another question that I am having trouble on.

I am being asked to arrange the oxides in each of the following groups in order of increasing basicity:
(a) K2O, Al2O3, BaO
(b) CrO3, CrO, Cr2O3

I know the answers are (a)Al2O3 < BaO < K2O and (b) CrO3 < Cr2O3 < CrO but I do not understand why these are the answers. How do you get these answers?

Thanks

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