Which of the following combinations of buffering systems and molar ratios of compounds would work best for a laboratory experiment requiring a pH of 2.4? (pKa (H3PO4) = 2.12 and pKa (HF) = 3.15). (a) 0.57 mol H3PO4 / 0.30 mol H₂PO4 (b) 0.60 mol HF / 0.11 mol F- (c) 0.11 mol HF / 0.60 mol F- (d) 0.30 mol H3PO4 / 0.57 mol H₂PO4 (e) none of the above

Which of the following combinations of buffering systems and molar ratios of compounds would work best for a laboratory experiment requiring a pH of 2.4? (pKa (H3PO4) = 2.12 and pKa (HF) = 3.15). (a) 0.57 mol H3PO4 / 0.30 mol H₂PO4 (b) 0.60 mol HF / 0.11 mol F- (c) 0.11 mol HF / 0.60 mol F- (d) 0.30 mol H3PO4 / 0.57 mol H₂PO4 (e) none of the above

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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