H3PO4 Ka1= 7.5x10^-3 Ka2= 6.2x10^-8 Ka3=4.2x10-^13

Question

Explain how you will make a buffer with a pH of 11.80 using solid Na2HPO4 and either 2.00 M NaOH or 2.00 M HCL. The most concentrated component should have a concentration of 0.50 M, and you need to make 2.50 liters of this buffer.

Answer 1

And what do you not understand about this? You know you will need the Henderson-Hasselbalch equation.

Answer 2

Where is the explanation for question