Follow-up questions1. What is the purpose of the lid on the colorimeter?2. In part 1, why is it necessary to calibrate absorbance at every wavelength?3. In part 1, the concentration of the CV+ stock solution was 12.5 uM. What mass of CV+ is found in 1 liter of thissolution? Give your answer in milligrams.(The molar mass of crystal violet is 407.979g.)6.4. What are the effects of the following changes on molar absorptivity?(a) when the concentration of CV+ changes?(b) during the course of the color-loss reaction?(c) when absorbance is measured at different wavelengths?5. In part 2, what labware or apparatus would you use to prepare solutions for the standard curve?In part 3, what percentage of the NaOH is left at the end of the color-loss reaction, assuming all the crystal violethas reacted? Show your calculation.6.7. (a) In part 3, how long is the half-life of the color-loss reaction (show the calculation)?(b) In part 4, is the half-life of the color-loss reaction affected by changing the concentration of NaOH? And how isthe half-life affected?

The calorimeter uses a closed lid, or surrounding area. In CAL2K ambient polystyrene is used as…

Answered: Follow-up questions 1. What is the…

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Follow-up questions 1. What is the purpose of the lid on the colorimeter?

Living by Chemistry

2nd Edition

ISBN:9781464142314

Author:Angelica M. Stacy

Publisher:Angelica M. Stacy

ChapterU5: Fire: Energy , Thermodynamics, And Oxidation-reduction

SectionU5.116: How Absorbing: Spectroscopy

Problem 6E

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