To prepare a buffer, 2.75 grams of sodium lactate (NaLac, molar mass = 112.06 g/mol) is added to 5.00 x 102 mL of 0.100 M lactic acid (HLac). a) What is the pH of this buffer? pH= type your answer.... b) To this solution was added 85.0 mL of 0.050 M KOH. What is the pH of this solution after the KOH addition? pH = type your answer.... c) To a copy of the original buffer solution (the one we prepared originally) is added 65.0 mL of 0.080 M HNO3. What is the pH of this solution after the HNO3 addition? pH= type your answer....
To prepare a buffer, 2.75 grams of sodium lactate (NaLac, molar mass = 112.06 g/mol) is added to 5.00 x 102 mL of 0.100 M lactic acid (HLac). a) What is the pH of this buffer? pH= type your answer.... b) To this solution was added 85.0 mL of 0.050 M KOH. What is the pH of this solution after the KOH addition? pH = type your answer.... c) To a copy of the original buffer solution (the one we prepared originally) is added 65.0 mL of 0.080 M HNO3. What is the pH of this solution after the HNO3 addition? pH= type your answer....
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:To prepare a buffer, 2.75 grams of sodium lactate (NaLac, molar mass = 112.06 g/mol) is added to 5.00 x 102 mL of 0.100 M lactic acid (HLac).
a) What is the pH of this buffer?
pH= type your answer....
b) To this solution was added 85.0 mL of 0.050 M KOH. What is the pH of this solution after the KOH addition?
pH = type your answer...
c) To a copy of the original buffer solution (the one we prepared originally) is added 65.0 mL of 0.080 M HNO3. What is the pH of this solution after the HNO3 addition?
pH
type your answer...
Transcribed Image Text:pka
You may need values from this pKas table for some of the questions below.
Acid
pka
H₂SO4
HSO4
HBr
NH4+
HCIO4
H₂CO3
HCO3
H₂S
HS™
H3PO4
H₂PO4
HPO42-
-3.00
1.92
-9.00
9.20
-10.00
3.60
10.30
7.01
19.00
2.12
7.21
12.32
HCI
-8.00
H₂SO3
1.92
HSO3
7.21
Lactic acid 3.85
benzoic acid 4.201
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