Hi I could use some help with this chemistry question please thanks alot.
f. Calculate the mass of solid Cr(OH)3 that would be collected from the entire class. (1 pt.) g. Assuming the solid from the entire class would fit easily into a one-pint jar, calculate the cost of disposing of the waste from the class in a "lab-pack. Calculate the cost per student. (Note: The charge is the same even if the jar is not full, but a pint jar costs proportionately less than a gallon jar.) (2 pt.) 4. Based on and Cucality, which of the options discuss above do vou think would be the best An Extra Credit: Some students think the dilution method would be the best option because they assume it costs nothing (which it doesn't, that's another issue). But there is another factor that we haven't mentionedtime. See how long it takes you to fill a one gallon container with water from a faucet at home, then figure out how long it would take for each student to run enough water to dilute his or her waste material. Does this information make dilution look like a more or less viable option? Briefly explain your answer. A Problem of Chemistry, Convenience, Conscience, and the Law It is often said that one of the big distinctions between an adult and a child is the fact that the adult nust take responsibility for his/her actions while the child does not. As responsible adults, we are onstantly faced with the problem of having to make choices. Often, when we have to select between everal alternatives, there is one that seems desirable because it is the most convenient. For example, fter changing the oil in a car or lawn tractor, wouldn't it be much easier to pour the old oil down the drain han to save it and dispose of it "properly"? We are tempted to think that "it can't matter if just one person loes it," but what would be the result if everyone thought that way? Just as we say that "every vote ounts", we must also realize that the behavior and choices of every individual count as well. n this exercise we will look at the sort of choices that must be made by chemistry lab instructors (and tudents) and some of the consequences of each choice. Note: Show all your calculations on these pages or on separate sheets. The details of the first situation were taken from an article in the March, 1987 issue of the Journal of Chemical Education entitled "Chemical Wastes in Academic Labs by Wendy A. Walton (J. Chem. Ed. Vol 64, No. 3, March, 1987. p. A69-71) and relate to an experiment done by students in an analytical hemistry laboratory class at Ohio State University. There are 150 students in the class. One of the experiments involves the analysis of a solution of Cr3+ ion by spectrophotometry. Each student is given 100 mL of a stock solution containing 0.050M Cr(NO3)3. From this stock solution, each student prepares a series of more dilute solutions for the purpose of constructing a calibration curve for Cr3+ ion. After completing the experiment, each student combines all the diluted solutions and any remaining stock solution in one single container. Each student ends up with approximately 200 mL of a solution that is 0.0200M Cr(NO3)3. The question is, what should be done with the waste solutions? The following three possibilities can be considered: a. Pour the solutions down the drain. b. Dispose of the solutions in a land-fill. c. Precipitate the Cr3+ ion and dispose of it
