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

Question

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

joannablackwelder · Answer

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

joannablackwelder · Answer

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

joannablackwelder · Answer

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

joannablackwelder · Answer

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