# What happens to the absorbance of cobalt(II) chloride solution as the concentration of the solution increases?

Week 6 – Report Sheet

Beer’s Law

Activity I.

1.  What happens to the absorbance of cobalt(II) chloride solution as the concentration of the solution increases? (3 points) Code: analysis, observations, numerical values
• How are absorbance and transmission of cobalt(II) chloride related? (3 pts) Code: analysis, observations, numerical values
• Use Beer’s law equation to determine the molar absorptivity (Ɛ) for cobalt(II) chloride . (3 pts) Code: general formula, substitution, significant figures, units

Activity II.

• Did you measure the absorbance of the two solutions at the same wavelength? Explain. (3 points) Code: numerical value, analysis, observations
• What is/are the color(s) from the light source used to measure the two solutions? Describe the relationship between the color from the light source, the solution color, and the absorbance for each measured solution. (3 pts) Code: descriptions, observations, analysis

Activity III.

• Based on your , complete Table 3 (3 pts). Code: title, descriptions, numerical values, general formula, number substitutions, sig. figs.

Table 3. ADD Title

• Describe the relationship between the width of the cuvette (pathlength) and absorbance of light for nickel(II) chloride solution (4 pts) Code: analysis, numerical values
•  Use the Beer’s Law to explain the relationship between the pathlength and the absorbance of light. Does this relationship support your results?  (3 pts) Code: general formula, analysis
• Why does the absorbance of a certain solution change upon changing the pathlength? (3 pts) Code: analysis

Activity IV.

1. Based on your results, complete Table 4 and Explain how the color of potassium chromate solution is related to the obtained wavelength(s) (8 pts)? Code: title, descriptions, numerical values

Table 4. Data from simulation for potassium chromate solution measured at _______ nm