Asked by yes

a solution made by dissolving 2.733g KH2PO4 and 4.508g K2HPO4 in water to give 250 ml of solution.

is the answer...

7.432= ph
Answered by DrBob222
What's the question?
Answered by yes
What is the pH of the buffer solution
Answered by DrBob222
The base is K2HPO4. The acid is KH2PO4.
Convert g base to mols. mols = grams/molar mass. Do the same for the acid. Convert each to M. M = mols/L.
Then substitute into the HH equation and solve for pH.
Answered by yes
thank you very much, do i used the molar mass of KH2PO4 altogether or just of H2PO4?
Answered by DrBob222
You use the molar mass of the material for which you have a mass; i.e., if your material weighed is KH2PO4 then mols KH2PO4 = grams KH2PO4/molar mass kH2PO4.
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