1
answer
0
watching
245
views
18 Nov 2019
The following %T data were obtained for a phenol red solution at 560 nm. Calculate the absorbances that correspond to the %T values. When two drops of concentrated HCl were added to the pH 7.13 solution, the indicator was converted to pure HIn form. Us measured absorbance, A_HIn, was 0.0003. When two drops of 50% NaOH were added to the pH 8.56 solution, the result was pure In form. The measured absorbance of this solution, A_In^-, was 0.712 Calculate the pK_a value for each solution and determine the average pK_a. Calculate K_a from the average pK_a.
The following %T data were obtained for a phenol red solution at 560 nm. Calculate the absorbances that correspond to the %T values. When two drops of concentrated HCl were added to the pH 7.13 solution, the indicator was converted to pure HIn form. Us measured absorbance, A_HIn, was 0.0003. When two drops of 50% NaOH were added to the pH 8.56 solution, the result was pure In form. The measured absorbance of this solution, A_In^-, was 0.712 Calculate the pK_a value for each solution and determine the average pK_a. Calculate K_a from the average pK_a.
1
answer
0
watching
245
views
For unlimited access to Homework Help, a Homework+ subscription is required.
Trinidad TremblayLv2
29 Aug 2019
Related textbook solutions
Basic Chemistry
5 Edition,
Timberlake
ISBN: 9780134138046
Principles of Chemistry Molecular Approach
4th Edition,
Tro
ISBN: 9780134112831
Principles of Chemistry Molecular Approach
3rd Edition, 2014
Tro
ISBN: 9780321971944
Chemistry: Structure and Properties
2nd Edition,
Tro
ISBN: 9780134293936
Chemistry: A Molecular Approach
3rd Edition,
Tro
ISBN: 9780321809247
Chemistry: A Molecular Approach
5th Edition,
Tro
ISBN: 9780134874371
Principles of Chemistry: A Molecular Approach
4th Edition,
Tro
ISBN: 9780134895741
Chemistry: The Central Science
14th Edition, 2017
Brown
ISBN: 9780134414232