A chemistry graduate student is given 250. mL of a 1.30M dimethylamine ((CH) NH) solution. Dimethylamine is a weak base with K,= 5.4 × 10**. What mass of (CH,) NH,Br should the student dissolve in the (CH,) NH solution to turn it into a buffer with pH = 10.93? 3/2' You may assume that the volume of the solution doesn't change when the (CH,) NH,Br is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.

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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A chemistry graduate student is given 250. mL of a 1.30M dimethylamine ((CH3). NH) solution. Dimethylamine is a weak base with K,=5.4 × 10 ". What
mass of (CH,) NH,Br should the student dissolve in the (CH,), NH solution to turn it into a buffer with pH = 10.93?
/2
2
2
You may assume that the volume of the solution doesn't change when the (CH,) NH,Br is dissolved in it. Be sure your answer has a unit symbol, and round it
2
3
to 2 significant digits.
Transcribed Image Text:A chemistry graduate student is given 250. mL of a 1.30M dimethylamine ((CH3). NH) solution. Dimethylamine is a weak base with K,=5.4 × 10 ". What mass of (CH,) NH,Br should the student dissolve in the (CH,), NH solution to turn it into a buffer with pH = 10.93? /2 2 2 You may assume that the volume of the solution doesn't change when the (CH,) NH,Br is dissolved in it. Be sure your answer has a unit symbol, and round it 2 3 to 2 significant digits.
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