A chemistry graduate student is given 100. mL of a 1.30M dimethylamine ((CH3), NH solution. Dimethylamine is a weak base with K,= 5.4 x 10 . What mass of (CH,), NH,Br should the student dissolve in the (CH, NH solution to turn it into a buffer with pH = 10.46? 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
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ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter15: Complex Ion And Precipitation Equilibria
Section: Chapter Questions
Problem 14QAP: A buffer solution is prepared by adding 5.50 g of ammonium chloride and 0.0188 mol of ammonia to...
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A chemistry graduate student is given 100. mL of a 1.30M dimethylamine ((CH3), NH) solution. Dimethylamine is a weak base with K,=5.4 x 10 ". What
2
mass of (CH,) NH,Br should the student dissolve in the (CH,), NH solution to turn it into a buffer with pH = 10.46?
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
to 2 significant digits.
x10
?
Transcribed Image Text:A chemistry graduate student is given 100. mL of a 1.30M dimethylamine ((CH3), NH) solution. Dimethylamine is a weak base with K,=5.4 x 10 ". What 2 mass of (CH,) NH,Br should the student dissolve in the (CH,), NH solution to turn it into a buffer with pH = 10.46? 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 to 2 significant digits. x10 ?
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