Buffers Keeps the Balance Lab 4. Which phosphate buffer solution in Part B corresponds to the composition of an ideal buffer solution? Compare its measured pH value with the calculated pH of the ideal buffer solution.
5. Use the universal indicator color chart to compare the observed pH changes for phosphate buffers A and B and the control solution (water) upon addition of HCI and NaOH. Were phosphate buffers A and B equally effective in resisting pH changes upon addition of either HCI or NaOH?
6. Do the results in Data Tables 2 and 3 confirm that the ideal buffer is optimally effective upon addition of either HC) or CHO N