Determine the numbers of mL of the Na For solution should you add to 20 mL of the 0.10 M H For to make your buffer? Formic acid, H For, has a Ka value of1.8*10-4. You require to prepare a buffer having a pH of3.40 from 1.10 M HFor and a 0.10 M Na For solution. When 5 drops of 0.10 M NaOH were added to 20 mL of the buffer in the previous question, the pH went from 3.39 to 3.42. Write down an et ionic equation to discuss why the pH did not go up much higher.