posted by Jake .
The Ka for hydroflouric acid is 4.5 *10^-4 at 298K. Calculate the amount of sold NaF that is required toprepare a 250. mL acidic buffer with pH = 2.75. The inital molarity of hydroflouric acid is .250M but you have only 75mL.
Jake, I've worked this problem twice in the last two or three hours. Were you one of the posters. If so, please tell me what you don't understand about it.