jc254 Posted July 31, 2011 Report Share Posted July 31, 2011 Ok guys who knows the answer to this question> The major cations in freshwaters include: a. Ca2+, Mg2+, Na+, K+ b. HCO3-, Cl-, SO4-2, NO3- c. Fe3+, Mn3+, Cu3+ d. CO2, O2, H2S, N2O Quote Link to comment Share on other sites More sharing options...
phoenix44 Posted July 31, 2011 Report Share Posted July 31, 2011 A cation is + so that eliminates b and d. The correct answer is a, but you are missing NH4+ and of-course H+. Quote Link to comment Share on other sites More sharing options...
Rob Posted July 31, 2011 Report Share Posted July 31, 2011 looks to my like the answer should be a) answer b) obviously wrong as they're anions answer d) obviously wrong as they're not ions answer c) are cations, but more likely to precipitate out as a solid compared to those for answer a), also those for c) aren't as likely to be major components /edit dammit - phoenix44 posted while I was typing my answer /edit hmmm jc254's email address is a Waikato Uni one, I hope we're not doing your chem homework for you Quote Link to comment Share on other sites More sharing options...
Li@m Posted July 31, 2011 Report Share Posted July 31, 2011 /edit hmmm jc254's email address is a Waikato Uni one, I hope we're not doing your chem homework for you Most likely :slfg: Quote Link to comment Share on other sites More sharing options...
jc254 Posted July 31, 2011 Author Report Share Posted July 31, 2011 I thought so too but couldn't put my finger on it. Its a freshwater paper i do, really interesting to see how diverse and different NZ is compared to overseas examples... Nah I did attend Waikato Uni but now go to CHCH as it has a much better science program. Stay tuned for future questions haha Quote Link to comment Share on other sites More sharing options...
Ismart120 Posted August 1, 2011 Report Share Posted August 1, 2011 haha, are you doing biol 375? - I was doing this quiz on sunday night... Quote Link to comment Share on other sites More sharing options...
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