What is the composition of a buffer solution of pH 7.4 made by
mixing 0.1 M NaH2PO4 and 0.1 M Na2HPO4. [Ka for NaH2PO4 = 6.22x10-8
M).
How to approach this question because evrything is given which
can be pleaced in the Handerson-Hassalbach equation. But what we
will get....?? Help please...
From the Henderson–Hasselbalch equation, plug in the pH and the pKa
value, to solve for the mole ratio of conjugate base (HPO4 2-) to
acid (H2PO4 -).
Since the molarities for both are the same, the ratio of moles =
ratio of volumes, and that's the answer ie. 'composition' of buffer
solution.