Phosphoric acid is a triprotic acid with the following pKa values:
pKa1=2.148, pKa2=7.198, pKa3=12.375
You wish to prepare 1.000 L of a 0.0500 M phosphate buffer at pH 7.540. To do this, you choose to mix the two salt forms involved in the second ionization, NaH2PO4 and Na2HPO4, in a 1.000 L volumetric flask and add water to the mark. What mass of each salt will you add to the mixture?
a. Mass NaH2PO4
b. Mass Na2HPO4
Answers: 2
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Phosphoric acid is a triprotic acid with the following pKa values:
pKa1=2.148, pKa2=7.19...
pKa1=2.148, pKa2=7.19...
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