### Buffer Preparation ProblemA chemistry graduate student is given **500. mL** of a **1.50 M trimethylamine ((CH₃)₃N)** solution. Trimethylamine is a weak base with $ K_b = 7.4 \times 10^{-4} $. What mass of **(CH₃)₃NHBr** should the student dissolve in the **(CH₃)₃N** solution to turn it into a buffer with $ pH = 10.62 $?You may assume that the volume of the solution doesn't change when the **(CH₃)₃NHBr** is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits.#### Important Information:- 500 mL of 1.50 M trimethylamine ((CH₃)₃N)- $ K_b $ of trimethylamine: $ 7.4 \times 10^{-4} $- Target pH: 10.62#### Steps to Solve:1. **Calculate the $ pOH $ from $ pH $**: \[ pOH = 14 - pH \]2. **Find the $ [OH^-] $ concentration**: \[ [OH^-] = 10^{-pOH} \]3. **Use the Henderson-Hasselbalch equation to find the necessary amount of conjugate acid**: \[ pH = pK_b + \log\left(\frac{[Base]}{[Acid]}\right) \]4. **Calculate the molar amounts of trimethylamine ((CH₃)₃N) and its conjugate acid ((CH₃)₃NHBr)** based on the given volume and concentration.#### Answer Format:- Ensure the final mass is expressed in grams (g).- Round the answer to 2 significant digits.#### Note:It is important for students to understand the relevance of the buffer solution in maintaining pH stability in various chemical and biological processes. The solution process involving $ pH, pOH, $ and the Henderson-Hasselbalch equation should reinforce fundamental concepts in analytical chemistry.

This is a buffer consisting of a weak base and salt of the same base with strong acid. pOH = pKb +…

A chemistry graduate student is given 500. mL of a 1.50M trimethylamine ((CH3)¸N) solution. Trimethylamine is a weak base with K,=7.4 × 10 *. what mass of (CH) NHBR should the student dissolve in the (CH,) N solution to turn it into a 3 buffer with pH =10.62? You may assume that the volume of the solution doesn't change when the (CH,) NHB is dissolved in it. Be sure your /3 answer has a unit symbol, and round it to 2 significant digits.

A chemistry graduate student is given 500. mL of a 1.50M trimethylamine ((CH3)¸N) solution. Trimethylamine is a weak base with K,=7.4 × 10 *. what mass of (CH) NHBR should the student dissolve in the (CH,) N solution to turn it into a 3 buffer with pH =10.62? You may assume that the volume of the solution doesn't change when the (CH,) NHB is dissolved in it. Be sure your /3 answer has a unit symbol, and round it to 2 significant digits.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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