Part A A 150.0 mL buffer solution is 0.100 mol L-1 in (CH3)2NH and 0.135 mol L-1 in (CH3)2NH2 Br. What mass of HCI will this buffer neutralize before the pH falls below 9.75? (Kb ((CH3)2NH) = 5.40 × 10-4) Express the mass in grams to two significant figures.

Part A A 150.0 mL buffer solution is 0.100 mol L-1 in (CH3)2NH and 0.135 mol L-1 in (CH3)2NH2 Br. What mass of HCI will this buffer neutralize before the pH falls below 9.75? (Kb ((CH3)2NH) = 5.40 × 10-4) Express the mass in grams to two significant figures.

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 31QAP: Enough water is added to the buffer in Question 29 to make the total volume 10.0 L. Calculate (a)...

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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.

Question

A 150.0 mL buffer solution is 0.100 mol L-¹ in
(CH3)2NH and 0.135 mol L-1 in (CH3)2NH2 Br.
▾
Part A
What mass of HCI will this buffer neutralize before the pH falls below 9.75? (Kb ((CH3)2NH) = 5.40 × 10-4)
Express the mass in grams to two significant figures.
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Step 1: Defining buffer solution!

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Step 2: Calculation for moles of methyl amine and methyl ammonium ion!

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Step 3: Formation of BCA table!

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Step 4: Calculation for the value of unknown y!

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Step 5: Calculation for mass of HCl

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