A chemistry graduate student is given 250. mL of a 0.70M dimethylamine ((CH,), NH) solution. Dimethylamine is a weak base with K, =5.4 x 10. What mass of (CH;) NH, CI should the student dissolve in the (CH,) NH solution to turn it into a buffer with pH = 10.57? You may assume that the volume of the solution doesn't change when the (CH, NH, Cl is dissolved in it. Be sure your answer has a unit symbol, and round to 2 significant digits. to

Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter14: Equilibria In Acid-base Solutions
Section: Chapter Questions
Problem 26QAP: You want to make a buffer with a pH of 10.00 from NH4+/NH3. (a) What must the [ NH4+ ]/[ NH3 ]ratio...
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O 2/5
Calculating the composition of a buffer of a given pH
A chemistry graduate student is given 250. mL of a 0.70M dimethylamine ((CH3),NH)
solution. Dimethylamine is a weak base with K, = 5.4 x 10
What
(CH,) NH,CI should the student dissolve in the
(CH,) NH solution to turn it into a buffer with pH = 10.57?
mass of
You may assume that the volume of the solution doesn't change when the (CH, NH,Cl is dissolved in it. Be sure your answer has a unit symbol, and round
to 2 significant digits.
Transcribed Image Text:O 2/5 Calculating the composition of a buffer of a given pH A chemistry graduate student is given 250. mL of a 0.70M dimethylamine ((CH3),NH) solution. Dimethylamine is a weak base with K, = 5.4 x 10 What (CH,) NH,CI should the student dissolve in the (CH,) NH solution to turn it into a buffer with pH = 10.57? mass of You may assume that the volume of the solution doesn't change when the (CH, NH,Cl is dissolved in it. Be sure your answer has a unit symbol, and round to 2 significant digits.
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