"A solution is to be buffer at pH = 3:35 with formic acid and formate.
(a) How many moles of formic acid and sodium formate are needed if the solution is to change pH by < 0.02 for the addition of 0.02 moles of strong acid?"
i need help how to set up a problem like this, i dont even know how to approche it !!
it just doesnt make sense to me, iam sure its easy but iam not just understanding it
any help is welcome