Question 26 To make a buffer from a mixture of HF and NaF that has a pH = 3.35 what must the ratio of [HF] K, be? K₂ for HF = 7.2 x 10-4. 口 Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimal e.g. 2.5E5 for 2.5 x 10°) Typed numeric answer will be automatically saved.

Question 26 To make a buffer from a mixture of HF and NaF that has a pH = 3.35 what must the ratio of [HF] K, be? K₂ for HF = 7.2 x 10-4. 口 Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimal e.g. 2.5E5 for 2.5 x 10°) Typed numeric answer will be automatically saved.

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter16: Reactions Between Acids And Bases

Section: Chapter Questions

Problem 16.90QE

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presented by Macmillan Learning Phosphoric acid is a triprotic acid (Kal = 6.9 x 10-3, K = 6.2 x 10-8, and K3 = 4.8 x 10-13). To find the pH of a buffer composed of H, PO, (aq) and HPO? (aq), which pK, value should be used in the Henderson-Hasselbalch equation? O pKal = 2.16 %3D O PK22 =7.21 O pK33 = 12.32 Calculate the pH of a buffer solution obtained by dissolving 10.0 g of KH, PO, (s) and 25.0 g of Na, HPO,(s) in water and then diluting to 1.00 L. = Hd Question Source: McQuarrie, Rock, And Gallogly 4e - General Chemsitry Publisher: University Scier 7:13 PM 11/8/202 五 0 FZ F8 F10 F11 F12 PrtScr Insert Delete F4 F5 Backspace 23 7. 8. 3. 5. R. E D F H B. N W PgUp Alt Ctrl Home PgDn
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