[mrorganiclover]

Good day all.

I'm aware that you're to attempt a question before asking for help here, but I'm really stumped so I need *delete me* I don't want the answer, just the concept/process. I am aware that I have to use the "Henderson-Hasselbalch Equation", just not sure which steps to take.

Starting with a solution that is 0.050M in KH2PO4, calculate the concentration of Na2HPO4 that is required to make a buffer solution of pH 7.80. pKa for H2PO4 - is 7.21

Thanks

[Babcock_Hall]

I would start by writing out the H-H equation and then plugging in what you know.

[Borek]

I would start identifying acid and its conjugate base, then follow Babcock_Hall advice