4. When we calculate the pH of the solutions it is found by using the following equation: mol NaAc pH =pK, + log mol HAc Bromocresol green is a weak acid, just like acetic acid. But our calculations assume that bromocresol green does not affect the overall acidity (pH) of the acetate solution. Why is this a good assumption?
4. When we calculate the pH of the solutions it is found by using the following equation: mol NaAc pH =pK, + log mol HAc Bromocresol green is a weak acid, just like acetic acid. But our calculations assume that bromocresol green does not affect the overall acidity (pH) of the acetate solution. Why is this a good assumption?
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Question
Need guidance on question # 4. Thanks in advance.
Transcribed Image Text:ull T-Mobile LTE
12:22 AM
17% C
X
e st pat of the lab, the following graph was produced.
Absorbance Curves for BCG
0.6.
basic form
acidic form
0.5F
0.4
0.3
0.2
0.1
wavelength (nm)
Wavelength of maximum absorbance for base form
a. The graph shows that the basic form has a maximum absorption at Amax, while the acidic has
its minimum absorption at Amax. Explain why the basic form and acidic form have opposite
absorptions at this specific wavelength.
What is the importance of determining the Ama?
b.
3. The accepted K, value for Bromocresol green is 1.6 x 10. Using your measured value,
determine the percent error.
% error= Jaccepted-measured x 100
accepted
4. When we calculate the pH of the solutions it is found by using the following equation:
pH =pk, + log (mol NaAc
mel HAC
Bromocresol green is a weak acid, just like acetic acid. But our calculations assume that
bromocresol green does not affect the overall acidity (pH) of the acetate solution. Why is this a
good assumption?
Mixed (absorbance)
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