10 Questions
What is the main goal of the student in the experiment?
To determine the concentration of CuSO4 in the solution
What is the purpose of the calibration graph in the experiment?
To establish a relationship between absorbance and concentration of CuSO4
What is the effect of the accidental change in wavelength setting from 280nm to 300nm on the experiment?
It would decrease the accuracy of the calibration graph
What is the unit of the concentration of the CuSO4 solution in the experiment?
Moles per liter
What is the value of the absorbance of the CuSO4 solution measured by the student?
0.30
What is the concentration of the CuSO4 solution in the experiment?
0.15M
What is the number of moles of CuSO4 in the impure sample of CuSO4(s)?
0.015 mol
What is the additional quantity that must be measured to calculate the mass percentage of CuSO4 in the impure sample of CuSO4(s)?
The mass of the sample
What is the relationship between the absorbance and concentration of CuSO4 in the experiment?
The absorbance is directly proportional to the concentration of CuSO4
What is the principle behind the spectrophotometer used in the experiment?
The Beer-Lambert law
Test your knowledge of the photoelectric effect and Beer-Lambert law in this physics quiz. Calculate the frequency of light with a given photon energy and understand how spectrophotometers and colorimeters measure light intensity. Apply your knowledge of absorbance and intensity to solve problems.
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