Exp 10 Lab Report.docx - Experiment 10 u2013 Colorimetric...

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Experiment 10 – Colorimetric AnalysisChemistry 40004/09/2018Tu/Th 1:30 PMColor of the dye assigned – GreenUnknown solution – C
II - ObjectivesThe objectives of Experiment 10 are to relate the wavelengths of electromagnetic radiations to color, to assess the properties of solutions to determine appropriate wavelength for the colorimetric analysis, and to find the concentration of a solution through the process.III – Theory1) What would happen to the absorbance that you measured at your λmaxif you had used a cuvette with a path length of 10.0 cm? EXPLAIN!
2) What would happen to the concentration of your dye if you had used a cuvette with a path length of 10.0 cm? EXPLAIN!Using a cuvette with a path length of 10.0 cm would not affect the concentration; i.e.; the concentration will remain the same regardless of how long the pathlength is. This is because units of concentration are moles of solute over liters of solution, so it is independent of the path length.
IV – Procedure
Part A: Relating Colors to their Wavelengths1.Place a small cuvette with white chalk in Spectronic-202.Set the device to 400 nm and look at the chalk. Record the color and mark a line for each wavelength. Repeat by incrementing 25 nm until wavelength reaches 600 nm.Part B: Determination of the Wavelengths of Maximum Absorption

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