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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Question
Using the image attached please please answer question 3 & 4
Please please answer as soon as possible please
![Part I Buffer Capacity.
Test
Initial Color with bromcresol Drops of 6M HCl to get
tube
green
yellow
рН
(optional)
#1
Blue
34
#2
Green
18
#3
Yellow
Test
Initial Color with bromcresol
Drops of 6M NaOH to
pH
tube
green
get blue
(optional)
#1
Blue
#2
Green
#3
Yellow
10
28
1. Calculate the [C2H3O2¯]/[HC2H3O2] for each solution before any acid or base is
added.
Test tube #1;
10243021 9
1HC2H3021
-
=9
Test tube #2: 162H3021 = 2 = 1
IHC2H3021
Test tube #3: 1C2H3021 = 1 ½ = 0.11
1HC2H3021
2. Calculate the pH of each solution before any acid or base is added:
Test tube #1: PH= pKa +10g 1A-1
IHAI
; = 4.74 +109 — — = 5.69
Test tube #2: PH = pKa + log 1A1 = 4.74 + 109 2 = 4.74
1HA)
Test tube #3: PH = pKa +10g 1A1 = 4.74 +109 +1 = 3.78
THAI](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdab67aeb-c4d9-43f7-88d0-dfd6e7af2d5d%2F2519ba22-d8da-40d6-b97e-54dff74ad03e%2F31cjbn_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Part I Buffer Capacity.
Test
Initial Color with bromcresol Drops of 6M HCl to get
tube
green
yellow
рН
(optional)
#1
Blue
34
#2
Green
18
#3
Yellow
Test
Initial Color with bromcresol
Drops of 6M NaOH to
pH
tube
green
get blue
(optional)
#1
Blue
#2
Green
#3
Yellow
10
28
1. Calculate the [C2H3O2¯]/[HC2H3O2] for each solution before any acid or base is
added.
Test tube #1;
10243021 9
1HC2H3021
-
=9
Test tube #2: 162H3021 = 2 = 1
IHC2H3021
Test tube #3: 1C2H3021 = 1 ½ = 0.11
1HC2H3021
2. Calculate the pH of each solution before any acid or base is added:
Test tube #1: PH= pKa +10g 1A-1
IHAI
; = 4.74 +109 — — = 5.69
Test tube #2: PH = pKa + log 1A1 = 4.74 + 109 2 = 4.74
1HA)
Test tube #3: PH = pKa +10g 1A1 = 4.74 +109 +1 = 3.78
THAI
Transcribed Image Text:3. Which solution buffered best against added acid? Which solution buffered best
against added base? Which is the best overall buffer?
4. Explain the results obtained upon addition of HCl and NaOH.
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