February 26, 2017

Homework Help: Chemistry(Please respond)

Posted by Hannah on Wednesday, April 18, 2012 at 5:21pm.

Calculate the pH of an aqueous solution of 0.15 M potassium carbonate.

I know that pH = -log(H30+) but I am not sure how to start this problem.

Chemistry(Please help) - DrBob222, Saturday, April 14, 2012 at 11:09pm
Hydrolyze the CO3^2-.
CO3^- + HOH ==> HCO3^- + OH^-
Do an ICE chart, Kb = Kw/k2 for H2CO3.

so for kb I do 1e-14/.15?

Chemistry(Please help) - DrBob222, Tuesday, April 17, 2012 at 3:27pm
No. Kb = 1E-14/k2 for H2CO3.

How do I set up an ice table when I only have .15M?

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