Question
You have to prepare a pH 3.50 buffer and you have .10M HCOOH and .10M HCOONa, how many milliliters of each solution do you neeed for 1 liter of buffer
Answers
DrBob222
Use the Henderson-Hasselbalch equation.
You will need to look up Ka for formic acid and convert to pKa.
Calculate the ratio Base/acid.
Then acid + base = 1
and base/acid = from above.
Two equations and two unknowns. Solve for acid and base. I get something like 600 mL acid and 400 mL base but those are just close numbers.
You will need to look up Ka for formic acid and convert to pKa.
Calculate the ratio Base/acid.
Then acid + base = 1
and base/acid = from above.
Two equations and two unknowns. Solve for acid and base. I get something like 600 mL acid and 400 mL base but those are just close numbers.