The teacher gave a student a 0.10 M solution of an unknown indicator solution. The student was to prepare a calibration graph of the absorbance versus indicator concentration for this unknown indicator. The 0.10 M solution was sufficiently dilute to be used directly in a spectrophotometer. What should be the student’s first step?
A.
Determine the wavelength of maximum absorbance.
B.
Make a series of dilutions to produce a set of solutions of varying concentrations.
C.
Determine the molar mass of the unknown indicator.
D.
Measure the mass and volume of the solution to determine its density.
Exam No：AP Chemistry Problem Set 6 Year：2024 Question No：APChemistry2024AP0183
Answer:
A
Knowledge points:
8.7 pH and pK
Solution:
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