A chemistry graduate student Is glven 100. mL of a 0.70M trimethylamine ((CH,) N solution. Trimethylamine is a weak base with K, =7.4 x 104. . What mass of (CH,) NHBR should the student dissolve in the (CH,) N solution to turn It into a buffer with pH = 11.29? You may assume that the volume of the solution doesn't change when the (CH,) NHB Is dissolved in It. Be sure your answer has a unit symbol, and round It to 2 significant digits. dh Fxplanation Check 2021 McGraw-HE Education Al Rights Reserved Terms of Use Ov0 11:27

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A chemistry graduate student is given 100. mL of a
0.70M trimethylamine ((CH,) N solutlon. Trimethylamine Is a weak base with K,=7.4×10
. What
%3D
mass of (CH,) NHB1 should the student dissolve in the (CH,) N solution to turn it into a buffer with pH = 11.297
3
3
You may assume that the volume of the solution doesn't change when the (CH,) NHBr Is dissolved in It. Be sure your answer has a unit symbol, and round it
3.
to 2 significant digits.
Ar
x10
Fxplanation
Check
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Transcribed Image Text:-4 A chemistry graduate student is given 100. mL of a 0.70M trimethylamine ((CH,) N solutlon. Trimethylamine Is a weak base with K,=7.4×10 . What %3D mass of (CH,) NHB1 should the student dissolve in the (CH,) N solution to turn it into a buffer with pH = 11.297 3 3 You may assume that the volume of the solution doesn't change when the (CH,) NHBr Is dissolved in It. Be sure your answer has a unit symbol, and round it 3. to 2 significant digits. Ar x10 Fxplanation Check © 2021 McGraw-Hill Education. All Rights Reserved Terms of Use Privacy Accessibility V O 11:27 hp Bố -> esc backspace #3 2$ % %3D ! 8. 9 6. 1 3 y W e tab e k 一 * 00
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