cwf09 - 20-10-2011 at 19:35
Hi, I'm a geology major and currently taking a geochemistry class. This problem has been vexing me. I made an alpha plot for the various
species(see the attached image) but the pH is far too low for the main species(vs. published data). I've been working on this for a while, and I'm
kind of lost at the moment. Any books that you can recommend that will help? How would you guys approach this problem?
3. Make a distribution diagram for the various Cr(VI) species as a function of pH at CrT=1, 10-2 and 10-4M. Neglect activity corrections.
Equilibria: CrO42-+H+=HCrO4-; logK1=6.5
HCrO4-+H+=H2CrO4; logK2=-0.8
2 HCrO4-=Cr2O72-+H2O logK1a=1.52
Cr2O72-+ H+=H Cr2O7- logK2a=0.07
[Cr]T=[CrO42-]+[HCrO4-]+2[Cr2O72-]+2[HCr2O7-]
DDTea - 20-10-2011 at 22:13
It looks like you forgot to attach the image of your work. Would you mind including your calculations as well?