1. What is your unknown number? Question 2 (1 point) What are your values of absorbance...

  

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1. What is your unknown number? Question 2 (1 point) What are your values of absorbance (6)? Question 3 (1 point) What is the equation for the linear fit of your calibration curve? Be sure to include R² Question 4 (1 point) What is the molar concentration of your unknown solution? > Question 5 (0.5 points) What factors are included in determining the relationship between absorbance and concentration? Question 6 (0.5 points) Account for any systemic or random sources of uncertainty. 1 A Question 7 (0.5 points) Explain whether this method could or could not be used to determine the concentration of a NaCl solution. LAB 5 BEERS LAW SAMPLE -2325 4 CLASS DATA CONCENTRATION (M) 0.080 0.160 0.240 0.320 0.400 UNKNOWN # 3 REPLICATE I 123 ABSORBANCE 0.208 0.524 0.744 1.07 1.26 .826 .818 .829 1) FIND THE EQUATION OF THE LINE FOR SAMPLES 1-5 (THE PRINTABLE VERSION OF THE LAB ONLY ASKS FOR THE SLOPE BUT I PREFER TO INCLUDE THE INTERCEPT AS WELL WITH ² 2) CALCULATE THE CONCENTRATION FOR EACH REPLICATE OF THE UNKNOWN 3) FIND THE AVERAGE CONCENTRATION AND STANDARD DEVIATION IF THE UNKNOWN #3 IS ACTUALLY 0.265 M DETERMINE THE PERCENT UNCERTAINTY 5) BE PREPARED TO COMMENT ON THE ACCURACY THE PRECISION OF THE PROCEDURE AND 1. What is your unknown number? Question 2 (1 point) What are your values of absorbance (6)? Question 3 (1 point) What is the equation for the linear fit of your calibration curve? Be sure to include R² Question 4 (1 point) What is the molar concentration of your unknown solution? > Question 5 (0.5 points) What factors are included in determining the relationship between absorbance and concentration? Question 6 (0.5 points) Account for any systemic or random sources of uncertainty. 1 A Question 7 (0.5 points) Explain whether this method could or could not be used to determine the concentration of a NaCl solution. LAB 5 BEERS LAW SAMPLE -2325 4 CLASS DATA CONCENTRATION (M) 0.080 0.160 0.240 0.320 0.400 UNKNOWN # 3 REPLICATE I 123 ABSORBANCE 0.208 0.524 0.744 1.07 1.26 .826 .818 .829 1) FIND THE EQUATION OF THE LINE FOR SAMPLES 1-5 (THE PRINTABLE VERSION OF THE LAB ONLY ASKS FOR THE SLOPE BUT I PREFER TO INCLUDE THE INTERCEPT AS WELL WITH ² 2) CALCULATE THE CONCENTRATION FOR EACH REPLICATE OF THE UNKNOWN 3) FIND THE AVERAGE CONCENTRATION AND STANDARD DEVIATION IF THE UNKNOWN #3 IS ACTUALLY 0.265 M DETERMINE THE PERCENT UNCERTAINTY 5) BE PREPARED TO COMMENT ON THE ACCURACY THE PRECISION OF THE PROCEDURE AND