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Midterm

Posted: Wed Feb 20, 2019 4:23 pm
by megangeorge-1K
I have a question about Question 3D
What is Ka2?

Re: Midterm

Posted: Wed Feb 20, 2019 4:25 pm
by dgerges 4H
it's the second deprotonation of h3po4
the first would include h2po4- in the product, the second will include hpo4^2- in the product

Re: Midterm

Posted: Wed Feb 20, 2019 4:29 pm
by Gillian Murphy 2C
Ka2 is the Ka for taking away the second hydrogen in H3PO4

the reaction would be

H2PO4(-) + H2O = HPO4(2-) + H3O(+)

and Ka2 would be

(HPO4(2-)*H3O(+))/H2PO4(-)

Re: Midterm

Posted: Wed Feb 20, 2019 5:55 pm
by juliasloan_4g
Ka2 is the second deprotonation, when an acid is polyprotic and can give away multiple hydrogens

Re: Midterm

Posted: Wed Feb 20, 2019 10:34 pm
by Jeannine 1I
Does anyone know how you would've figured out the oxidation states of the reactants and products involved?

Re: Midterm

Posted: Wed Feb 20, 2019 10:38 pm
by Casandra
Ka2 is the second deprotonation of phosphoric acid