5. A buffer solution contains 10.0 mmol of formic acid (HCOOH) and 15.0 mmol of formate (HCO0). If the solution pH is 3.95, then what is the Ka of formic acid? (а) 7.5 х 10-5 (b) 1.1 х 104 (c) 4.1 x 102 (d) 1.7 x 10-4

5. A buffer solution contains 10.0 mmol of formic acid (HCOOH) and 15.0 mmol of formate (HCO0). If the solution pH is 3.95, then what is the Ka of formic acid? (а) 7.5 х 10-5 (b) 1.1 х 104 (c) 4.1 x 102 (d) 1.7 x 10-4

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter16: Principles Of Chemical Reactivity: The Chemistry Of Acids And Bases

Section16.2: Water And Ph Scale

Problem 3RC: If the pH of a solution containing the strong base Sr(OH)2 is 10.46 at 25C, what is the...

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Question

5. A buffer solution contains 10.0 mmol of formic acid (HCOOH) and 15.0 mmol of formate (HCO0). If the
solution pH is 3.95, then what is the Ka of formic acid?
(а) 7.5 х 10-5
(b) 1.1 х 104
(c) 4.1 x 102
(d) 1.7 x 10-4

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