Design a buffer of pH 4.0 that resists the addition of 75 mmol HCl. Explain your reasoning (no calculations required). Run a simulation to check. Calculate the moles of weak acid and conjugate base in solution before and after addition of HCI. Make a buffer of pH 5.2 that resists the addition of 50 mmol NaOH. If you think it is not possible, explain why.
Design a buffer of pH 4.0 that resists the addition of 75 mmol HCl. Explain your reasoning (no calculations required). Run a simulation to check. Calculate the moles of weak acid and conjugate base in solution before and after addition of HCI. Make a buffer of pH 5.2 that resists the addition of 50 mmol NaOH. If you think it is not possible, explain why.
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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Transcribed Image Text:Designing Buffers
1. Design a buffer of pH 4.0 that resists the addition of 75 mmol HCl. Explain your
reasoning (no calculations required). Run a simulation to check. Calculate the moles
of weak acid and conjugate base in solution before and after addition of HCI.
2. Make a buffer of pH 5.2 that resists the addition of 50 mmol NaOH. If you think it is
not possible, explain why.
STEP 1: CREATE A
STEP 3: MEASURE TH
Select a Weak Acid
3.01
pH
O Acetic Acid
O Formic A.
T
25.00 °C
O Lactic Acid
Select a Molarity
Insert Probe
1.00
M
Select a Volume
Remove Probe
100.00 mL
Salt
O Sodium Acetate
O Sodium Formate
O Sodium Lactate
Select a Molarity
1.00 M
Select a Volume
100.00 mL
STEP 2: ADD HCI OR
OHCI
NaOH
Select an Amount
75.0 mmo
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