Abuffer is made up of 350 ml each of 0.20 m hf and 0.14 m naf. assuming that volumes are additive, calculate a) the ph of the buffer solution. b) the ph of the buffer after the addition of 0.030 mol of koh to the above buffer c determine the number of moles of hci would have to be added to the buffer (in a) to make the ph decreases by 1.50 ph unit. is this solution still an effective buffer? briefly explain in terms of buffer capacity