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Title: Please help so lost Calculate the concentration of the 5 chemical species present in a solution? Post by: askaquestion on Apr 14, 2013 Calculate the concentration of the 5 chemical species present in a solution that is 0.015 Molar di-sodium oxalate in pure water. (Na2Oxalate and H20...no dissolved gases or other contaminants).
Please HELP im so lost I don't know where to start and I read my book but it didn't help at all. Title: Please help so lost Calculate the concentration of the 5 chemical species present in a solution? Post by: nvhungc3 on Apr 14, 2013 haha you're in a johnson's class too eh?
All I'm sure of is that the reactions are Na2C2O4 + water --> NaHC2O4 + NaOH (pka is 4.266) and then NaHC2O4 + H20 --> H2C2O4 + NaOH (pka is 1.250) So we've got the reactions and therefore know the species (and prolly all the required info). What to do from here, I do not know either :/ EDIT: well its 4am so you wont get this in time, but I found this http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch17/diprotic.php that shows how to work through the dissociation math for a diprotic base. cheers! |