Would you have obtained the same rate law if you used absorbance directly instead of concentration? Explain why or why not.
Would you have obtained the same rate law if you used absorbance directly instead of concentration?...
why is it important to force the trendline in the plot of absorbance vs concentration through the origin? Would adding the point (0,0) have had the same effect? Why or why not? (Beer's Law experiment)
11. You produce a graph of absorbance vs. concentration which yields the equation y=1579.7x. If the concentration of salicylic acid increased by 1/3 would you expect the absorbance to also increase by 1/3? Explain your reasoning using Beer's law.
In the experiment we used the absorbance of crystal violet vs time to construct graphs to determine the reaction order with respect to crystal violet. Useing Beer's Law (A=abc) explain why the absorbance of crystal violet can be substituted for reactant concentration on the graphs. (in detail) thank you!
Chem 162 Experiment 2 Spectrophotometric Determination of Ion Concentration by Beer's Law Pre-Lab Questions a. A sample absorbs 80% of the light passed through it at a certain wavelength. What is the absorbance of the sample at this wavelength? b. What would the absorbance be at the same wavelength if the sample were diluted by half? Assume the same size sample cell was used. 2, A 0.070 M solution has an absorbance ofA = 0.689. If a 1.00 cm path...
How do I use Beer's law to convert all my absorbance data into concentration data in excel (and also by hand)? There are three different temperatures in excel. Let's say 10 Celcius, 20 C and 30. They all have the same concentration of the solution used which was 3.0*10^-5 and the length was 2 cm. How do I do this on excel and then generate a data vs. time graph? I also need to create graphs with Ln (temperatures) and...
You have three solutions each containing the same concentration of a different protein. Two of these proteins have 2 Trp in their sequence, whereas the third one only contains one Tyr and one Phe. Which protein solutions will show the highest absorbance at 280nm? Why?
If you have a vertical string instead of a horizontal would the object travel the same distance w/ the same speed? What vectors of forces would be involved?
The following data were obtained: 525 nm Concentration Absorbance 0.000008 0.005 0.000016 0.010 0.00004 0.040 0.00008 0.070 Plot the data and determine the trendline (slope and y-intercept) Use Beer's law to calculate molar absorptivity for KMnO4 given the cell width to be 1 cm
You have prepared a calibration curve that relates absorbance, A, to a concentration, C, as follows: A = m·C + b. The slope of the curve is m = (34,500 ± 1,200) M-1. The intercept of the curve is b = -0.09 ± 0.02. You measure an absorbance value of 0.938 ± 0.05 for the analyte in the sample. Calculate the concentration of the analyte, the absolute uncertainty of the concentration and the relative uncertainty of the concentration. You can...
6) According to the Beer-Lambert Law, what would happen to the absorbance of a solution if the concentration of analyte (substance being studied) is tripled? 7) At a wavelength of 447 nm, the absorbance of a solution that is 5X10M in the FeSCN complex is found to be 0.981. Assuming this is accurate, calculate the molar absorption coefficient (absorptivity) for the complex if the optical path length is 1.0 cm.