The measured Ka value is 1.62 x 10^-5.Please help to solve questions 3 and 4. Thanks again ull T-Mobile LTE12:22 AM17% CXe st pat of the lab, the following graph was produced.Absorbance Curves for BCG0.6.basic formacidic form0.5F0.40.30.20.1wavelength (nm)Wavelength of maximum absorbance for base forma. The graph shows that the basic form has a maximum absorption at Amax, while the acidic hasits minimum absorption at Amax. Explain why the basic form and acidic form have oppositeabsorptions 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 100accepted4. When we calculate the pH of the solutions it is found by using the following equation:pH =pk, + log (mol NaAcmel HACBromocresol green is a weak acid, just like acetic acid. But our calculations assume thatbromocresol green does not affect the overall acidity (pH) of the acetate solution. Why is this agood assumption?Mixed (absorbance)

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Answered: 3. The accepted K, value for…

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

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter20: Dienes, Conjugated Systems, And Pericyclic Reactions

Section20.3: Uv-visible Spectroscopy

Problem 20.5P

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Question

100%

The measured Ka value is 1.62 x 10^-5. Please help to solve questions 3 and 4. Thanks again

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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