A chemistry graduate student is given 100.mL of a 0.40M trimethylamine ((CH3)3N) solution. Trimethylamine is a weak base with =Kb×7.410−4. What mass of (CH3)3NHCl should the student dissolve in the (CH3)3N solution to turn it into a buffer with pH =10.35? You may assume that the volume of the solution doesn't change when the (CH3)3NHCl is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.

General Chemistry - Standalone book (MindTap Course List)
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ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter17: Solubility And Complex-ion Equilibria
Section: Chapter Questions
Problem 17.122QP
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A chemistry graduate student is given 100.mL of a 0.40M trimethylamine ((CH3)3N) solution. Trimethylamine is a weak base with =Kb×7.410−4. What mass of (CH3)3NHCl should the student dissolve in the (CH3)3N solution to turn it into a buffer with pH =10.35? You may assume that the volume of the solution doesn't change when the (CH3)3NHCl is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.

 

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