PKa Values of Phosphoric Acid Are 2

question 54

Multiple Choice

pKa values of phosphoric acid are 2.2,7.2 and 12.7.A phosphate buffer of pH = 7.4 can be prepared using

• A)H₂PO₄- and HPO₄²-.
• B)HPO₄²- and PO₄³-.
• C)H ₃PO₄ and HCl.
• D)None of the above.

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