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

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.