Lab 06 -Kinetics of Crystal Violet Lab Report Worksheet 2022-1 copy

1) What is the subject of each of the figures above ? 2) What is the main message of figure? 3) Give a brief but complete description of the three sections of the chemical mechanism along with a statement on the significance of the reaction.

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3. Using the data at right: a. Calculate the absorbance of each sample. You will need to express the %T values as decimals before calculating the logarithms. (e.g., for T = 25%, A = -log 0.25 = 0.602) b. Use the graph paper on the back of this page (or a spreadsheet) to plot absorbance vs. concentration. Make a proper graph, with labeled axes, uniform scales, etc. Use a ruler to draw the best-fit line.. C. Use the graph to find the concentration of the un- known sample. (Draw dotted lines on the graph showing how you found your answer.) CONCENTRATION PERCENT (ppm) TRANSMISSION 0 100.0 100 74.1 200 54.9 300 40.7 400 30.1 500 22.3 unknown 31.6 ABSORBANCE

Answer last 3

Please answer all and post below the answer the source from where you got the answer thank you!

In a oxidation of cyclohexanol reaction please answer the following question: Is IR spectroscopy a good tool to monitor the progress of this reaction, if yes, why?

Determine the standard concentration of A through E and then the absorbance. I just need clarification on if I add together the two ml values given.

Project 2: Food Dye Spectroscopy   Which scale is most useful for reporting data from the spectrometer? Why?

Drag the appropriate labels to their respective targets. • View Available Hint(s) MgCl MgCl2 CaCl CaCl2 3 G1 CaCo, + G1 HCI H,O + G1 CO. → G1 G2 + G1 G1 Mg(OH), + G1 HCI G1 H,O G1 G2 + 2.

7. Given the pK, information for different acids below, place the following acids in order of increasing acid strength (from weakest to strongest). Anilinium ion, CSH6N*, pKa = 4.60 Benzilic acid, pka = 3.09 %3D Chloroacetic acid, pKa = 2.98 %3D Dibromophenol, pka = 8.06 %3D a) Anilinium ion → Benzilic acid → Chloroacetic acid → Chloroacetic acid b) Dibromophenol → Chloroacetic acid → Benzilic acid → Anilinium ion c) Chloroacetic acid → Benzilic acid → Anilinium ion → Dibromophenol d) Dibromophenol → Anilinium ion → Benzilic acid → Chloroacetic acid e) Chloroacetic acid → Anilinium ion → Dibromophenol→ Benzilic acid f) none of the above

Why is it important for solutions to be diluted before they are run through spectroscopy?

This question uses the same data as the previous question. The calibration curve is a graph of absorbance versus concentration. Absorbance is a dimensionless quantity. The slope of the calibration curve is m = 2.24 x 10^4 M^-1. Find the concentration detection limit.

4. The following is the mass spectrum of tert-butylbenzene. a) label the molecular ion peak on the spectrum b) label the base peak on the spectrum c) draw the fragmentation of the molecular ion to produce the base peak fragmentation 100 119 80 60 40 134 20 0.0+ 0.0 40 80 120 160 m/z Rel. Intensity

Please help! I don't know how to even start

Please try to solve it in 30 minute

Rx tn.Oz /DMF what is the me Canissum 2

There is no chromophore in ethanol and the λmax for acetaldehyde is 218 nm. Explain why A340 is used to measure the rate of the reaction.

I will add the spectra results this may help you

Standard addition. A blood serum sample containing Na gave an emission signal of 4.27 mV. A small volume of concentrated standard Na was then added to increase the Na concentration by 0.104 M, without significantly  diluting the sample. This “spiked” serum sample gave a signal of 7.98 mV in atomic emission. Find the original concentration of Na in the serum.