The Kb for four bases are CN'- = 1.6 x 10$, CO3²- = 2.1 × 104, NH3 = 1.8 × 10$, F'- = 1.5 × 10-1". If the pH's of 0.50 mol/L solutions of each of these weak bases were measured and they were placed in order from highest pH to lowest the result would be which of the following? a. CN';, CO;²", NH3, F'- b. CO3²,NH3, CN', F'- c. F', CN',NH3,CO;2- d. CO3?,CN';,NH3, F'- none of the above е.

Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter13: Acids And Bases
Section: Chapter Questions
Problem 90QAP: A student prepares 455 mL of a KOH solution, but neglects to write down the mass of KOH added. His...
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15. The Kb for four bases are
CN'- = 1.6 x 10$, CO;²- = 2.1 × 104, NH3 = 1.8 × 10-$, F'- = 1.5 × 10-11. If the pH's of 0.50 mol/L solutions of
each of these weak bases were measured and they were placed in order from highest pH to lowest the result
would be which of the following?
a. CN'', CO;²", NH3, F'-
b. CO3?,NH3, CN'", F'-
c. F', CN',NH3,CO;²-
d. CO;²-,CN'-,NH3, F'-
none of the above
е.
Transcribed Image Text:15. The Kb for four bases are CN'- = 1.6 x 10$, CO;²- = 2.1 × 104, NH3 = 1.8 × 10-$, F'- = 1.5 × 10-11. If the pH's of 0.50 mol/L solutions of each of these weak bases were measured and they were placed in order from highest pH to lowest the result would be which of the following? a. CN'', CO;²", NH3, F'- b. CO3?,NH3, CN'", F'- c. F', CN',NH3,CO;²- d. CO;²-,CN'-,NH3, F'- none of the above е.
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