Difine Rf value.

A student calibrated the mini-spectrophotometer with a blank solution, and then went to check their solution. They got a fingerprint on the cuvette while filling it. Because of this, the expected reading for the absorbance would be [Select] [Select] ✓ [Select] too high too low O which would cause the calculated value of Ke to be

Convert the following absorbance to transmittance. a. 0.283     b.   0.625

Do your graphs show the trends a)you expected based on what you know about absorbance and transmittance using a spectrophotometer? Why or why not? b) why does absorbance data relate more conveniently to concentration that does transmission data?

What is ln(A) be with reference to ln(A) vs. time graph? What would 1/A be with reference to 1/A vs. time. graph? Trial 1   Time (s) Absorbance  0 0.600 30 0.522 60 0.454 90 0.392 120 0.344 150 0.300 180 0.261

Your calibration curve will be generated using absorbance and concentration data. However, you collected %Transmittance data in the lab. Could you use a plot of %Transmittance versus concentration to generate a calibration curve? Why or why not?

what is the difference of spectrophotometer with ATR (attenuated total reflectance) and one without it. What are the advantages of one over the other?

Please find the absorbance and plot te calibration curve

For the experimental data used in this lab, why was it okay to use the absorbance values instead of concentrations?

Does a calibration curve alwasy compare concentration and absorbance? Or can it compare concentration and %T as well?