Answered: Question: - Consider a buffer made by…

Question: - Consider a buffer made by adding 42.3 g of (CH₃)₂NH₂I to 250.0 mL of 1.42 M (CH₃)₂NH (Kb = 5.4 x 10⁻⁴) What is the pH of the buffer after 0.120 mol of OH⁻ have been added?

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter14: Equilibria In Acid-base Solutions

Section: Chapter Questions

Problem 79QAP: How many grams of NaF must be added to 70.00 mL of 0.150 M HNO3 to obtain a buffer with a pH of...

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Concept explainers

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

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Question: - Consider a buffer made by adding 42.3 g of (CH₃)₂NH₂I to 250.0 mL of 1.42 M (CH₃)₂NH (Kb = 5.4 x 10⁻⁴) What is the pH of the buffer after 0.120 mol of OH⁻ have been added?

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Step 1: Given data

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Step 2: Calculation of initial number of moles

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Step 3: Calculation of number of moles after adding base

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Step 4: Calculation of pKb

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Step 5: Calculation of pH

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