A1.00 l buffer solution is 0.250 m in hf and 0.250 m in lif. calculate the ph of the solution after the addition of 0.150 moles of solid lioh. assume no volume change upon the addition of base. the ka for hf is 3.5 × 10-4. a 1.00 l buffer solution is 0.250 m in hf and 0.250 m in lif. calculate the ph of the solution after the addition of 0.150 moles of solid lioh. assume no volume change upon the addition of base. the ka for hf is 3.5 × 10-4. 4.06 3.63 3.46 2.85 4.24