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August 1, 2014

Homework Help: Chemistry

Posted by Katherine on Friday, April 20, 2012 at 1:40am.

Calculate the concentrations of all species in a 0.810 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4 x 10^-2 and Ka2 = 6.3 x 10^-8

so I'm trying to find Na, SO3 2-, HSO3-, H2SO3, OH-, H+ and heres what I tried to do so far but I'm not even sure if it's right:
Na2SO3 -> 2Na + SO3 2-
0.810 M ...... 0 ...... 0
-x ................+x.....+x
1.4 x 10^-2 = (x^3)/(0.810-x)
x = 0.203959

H2SO3 + OH- = H2O + HSO3-
and then an ICE chart for this one..?

I'm not sure... please help!

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