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Chemistry 7 Online
OpenStudy (toxicsugar22):

caculate the ph of a dihydrogen phosphate/ hydrogen phosphate buffer prepared with the following concentration. ( ka for H2PO4- is 6.2*10^-8. report answer to 3 sig figs 0.18 M NaH2PO4 and 0.18 M Na2HP04

OpenStudy (joannablackwelder):

This one is a lot harder. You will need to first write your equilibrium reaction.

OpenStudy (joannablackwelder):

I think it would be H2PO4- + H20 <-> H3O+ + HPO42-

OpenStudy (joannablackwelder):

And Ka = concentration of the product solutes/concentration of the reactant solutes

OpenStudy (joannablackwelder):

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