Question

                                                       

		Preset Wavelength: Simulation default setting			Variable Wavelength: Set to same color as solution
Solution	Solution Color	Beam Color	Value (nm)	Abs	Beam Color	Value (nm)	Abs
Drink mix	Light Red	Light Green	508 nm	0.51	Kinda Light Red	634 nm	0.02
Potassium Permangana te-ate	Light Purple	Light Green	544 nm	0.20	Kinda Light Purple	405 nm	0.03
Copper (II) Sulfate	Light Blue	Dark Red	780 nm	0.96	Kinda Light Blue	484 nm	0.01

 

b. What combinations give the most absorbance? Why? 

When the beam color and the solution color is totally two different colors then the abundance number is larger.

c. How are beam color, solution color, and absorbance related?

Answer 1

ANSWER - Question b:

What combinations give the most absorbance? Why?

• Light blue and dark red gives the most absorbance (0.96)
• The most absorbance is obtained when beam color is complementary to the color of solution. In this case the copper solution is light blue (484 nm), and blue substances has a strong absorbance at the wavelength of complementary color of light (see the color wheel below).

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ANSWER - Question c:

How are beam color, solution color, and absorbance related?

• Absorbance (A) is a measurement of the ratio between the intensity of the beam directed at the solution (I₀) and the intensity of the beam transmitted by the solution (I_t):

• The color of solution determine the color beam-type that is most absorbed (see wheel color image) by the solution.
• A high absorbance means that the colored solutions absorbs almost completely the energy of the beam color light passed trough the solution. Then if you irradiated a colored solution using a beam with the complementary color, the absorbance of the solution will be high.