Čalculate the concentration of an AMD sample that has an absorbance of 0.155 an the following calibration curve. (Do not use the intercept value.) Calibration Curve Linear Fit for: Latest | Absorbance Abs = mx+b m (Slope): 0.04390 b (Y-Intercept) -0.0005567 Correlation: 0.9982 RMSE: 0.004804 0.20- 0.15- 0.10- 0.05- 0.00- 2 4 Concentration C = 0.155 mg/L C = 0.283 mg/L C = 3.55 mg/L C = 3.53 mg/L Absorbance

Calculate the concentration of the unknown MnO4 sample, given the following standard addition experiment. Step 1: A 2.00 mL aliquot of an unknown MnO4 sample was diluted to 100.0 mL and the absorbance measured to be 0.275. Step 2: A 2.00 mL aliquot of an unknown MnO4 sample was placed in a 100.0 mL flask. A 2.00 mL aliquot of a 100.00 ppm MnO4 standard was added to the flask and the absorbance measured to be 0.6. Report your answer to one decimal place.

NAME: LAB SECTION: EXPERIMENT 21: Spectroscopy of Dyes POSTLAB EXERCISE 1. AUV/V is a spectrometer used to measure the absorbance of a solution of hemoglobin bound to oxy- gen at 590 nm. The molar absorptivity was determined to be 8.57 × 104 M-'cm-. The cuvette used had a 1.00-cm sample pathlength. The measured absorbance was ), 140. What was the concentra- tion of hemoglobin in the solution? 2. What would be the absorbance of the solution in question 1 if the pathlength were 2.00 cm? nohntooote 196

The absorbance values at 250nm of 5 standard solutions, and sample solution of a drug are given below: Conc. (ug/ml)          A 250 nm10                                0.16820.                               0.32930                                0.50840.                               0.66050                                0.846Sample.                      0.661Calculate the concentration of the sample