d ncasdle Tts absorbance, Report: 24 1. Carefully prepare a graph using a graphi
ID: 1034515 • Letter: D
Question
d ncasdle Tts absorbance, Report: 24 1. Carefully prepare a graph using a graphical analysis program or graph paper of absorbance chloride solution. Mark the wavelength of maximum ? What color light was versus wavelength for the cobalt absorbance. At what wavelength was the absorbance at a minimum passing through the solution at the wavelength of minimum absorbance? Are the results consistent with your expectations of absorbed versus reflected light? Carefully prepare a graph of absorbance versus concentration of cobalt chloride in moles per liter (M). Include the absorbance and the concentration of the stock solution measured at the wavelength of maximum Absorbance in part II. Draw the best straight line through the data (use a ruler) or using a graphical analysis program. Should the Beer's Law calibration plot pass through 0,0? Why or why not? Calculate the slope of the line. What is the value of the molar extinction coefficient? 2. 3. Determine the concentration of your unknown sample by using the absorbance of your unknown solution and the value of the molar extinction coefficient. Report this value with the code number of your unknown. DiscusS value alve tor un Lrecod ue calilorashon eurve todatermine the concootration 67Explanation / Answer
In question no 2 it is said to draw the best possible fit,you need to draw it and write the Rsquare value.
In question 2 "Should the Beer's Law calibration plot pass through (0,0)?" Ideally Yes, but it is practically impossible to make concentration of any absorbent zero, but theoritically if it is made zero, the line will pass from (0,0).
Also mentionthe value of Molar extinction coefficient.
R square value - discuss- the more it tends to 1, the more significant the corelation, if the value is less than 0.5, then it can be said there is no significant corelation b/w two parameters involved.
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