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A chemistry graduate student is given 250. mL of a 1.80M 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 2 %3D turn it into a buffer with pH = 11.26? 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.

A chemistry graduate student is given 250. mL of a 1.80M 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 2 %3D turn it into a buffer with pH = 11.26? 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
Chemistry: Principles and Reactions
8th Edition
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 11QAP: A buffer is prepared by dissolving 0.0250 mol of sodium nitrite, NaNO2, in 250.0 mL of 0.0410 M...
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A chemistry graduate student is given 250. mL of a 1.80 M dimethylamine ((CH3), NH) solution. Dimethylamine is a 2 -4 weak base with K = 5.4 × 10 What mass of (CH, NH,Br should the student dissolve in the (CH,) NH solution to 2 turn it into a buffer with pH = 11.26? You may assume that the volume of the solution doesn't change when the (CH,) NH,Br is dissolved in it. Be sure your 2 answer has a unit symbol, and round it to 2 significant digits.
Transcribed Image Text:A chemistry graduate student is given 250. mL of a 1.80 M dimethylamine ((CH3), NH) solution. Dimethylamine is a 2 -4 weak base with K = 5.4 × 10 What mass of (CH, NH,Br should the student dissolve in the (CH,) NH solution to 2 turn it into a buffer with pH = 11.26? You may assume that the volume of the solution doesn't change when the (CH,) NH,Br is dissolved in it. Be sure your 2 answer has a unit symbol, and round it to 2 significant digits.
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