Online Quiz-Exp1 Safety and Risk Management(1) PDF

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Organic Chemistry pre lab quiz answers...

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ONLINE ASSESSMENT QUIZ Q/A – EXPERIMENT 1 - SaRM Key/Legend Title – All titles correspond to Prelab quizzes seen on UTS Online. Subtitle – Questions, answers and notes. [FIGURE X] – Figures are kept in the Appendix at the tail-end of this chapter.  - Incorrect answer  - Correct answer Description This chapter contains all questions contained within the following UTS Online file directory: > My UTSOnline > Organic Chemistry 1 Autumn 2018 65202-2018-AUTUMN-CITY > Assignments > OC1-2018-Prelab Assessments > Experimental Prelab Tests > Experiment 1 > Safety and Risk Management (Exp.1)

Appendix section The questions, answers and notes laid out in this document will make reference to various images and sources which are provided in the tail-end appendix section of this chapter.

Notes section There is ample room provided at the end of each listed question for critical feedback regarding the constituency, format and reasoning of the questions. This can be used for feedback throughout the course of the semester regarding any potential changes that may benefit the online quizzes in the future.

Qu Quest est estion ion 1 ((X.X/ X.X/ X.X/1. 1. 1.0) 0) Question

Select the solvents which CANNOT be safely heated in an open conical flask over a Bunsen burner flame.

[FIGURE 1]

(access flammability and toxicity data of the following solvents)

Answer(s)      

Ether – (CH3CH2)2O Hexane – C6H14 Tetrachloromethane – CCl4 Ethanol – CH3CH2OH Water - H2O Toluene – C6H5CH3

Notes _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________

Qu Quest est estion ion 2 ((X.X/ X.X/ X.X/3. 3. 3.0) 0) Question 'It is not safe to heat the solvents you have selected in the previous question'

Select the appropriate answers below to justify the statement above. To assist your answers, the use of Internet searching is encouraged to identify the potential risks that these solvents pose by reading the relevant Safety Data Sheet or SDS (e.g. SigmaAldrich, Chemwatch). (the solvents were: ether, hexane, tetrachloromethane, ethanol, water, toluene)

Answer(s)  The majority of listed solvents pose a flammability risk.  The listed solvents, except Ethanol and Water are considered Toxic, either acutely or to the reproductive system.  Carbon tetrachloride does not pose a flammability risk.  Some of the listed solvents can cause organ damage, such as eye and skin irritation or corrosion.  None of the listed solvents pose a reproductive toxicity risk.  Toluene, Ether and Carbon tetrachloride appear to be the safest of the listed solvents and can be heated with a Bunsen flame even in open air due to their inert nature.  Contrary to popular belief, Water is flammable at temperatures above 150o C. Therefore heating Water with a Bunsen flame poses a risk to the scientist.  None of the solvents listed here have flashpoints or autoignition temperatures making them the safest solvents available.  Wearing gloves will protect you against all solvent exposure, as no solvent (to date) has ever permeated a Nitrile or Latex glove.  In a research laboratory, heating of a solvent, such as the ones listed, must be done in a fume hood with proper ventilation at all times.  In all instances in a chemical laboratory, heating of a solvent presents the potential risk of bubbling, evaporation and condensation into your immediate environment. This can more than likely expose your body to the solvent, even when all appropriate precautions are taken. Notes _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________

Qu Quest est estion ion 3 ((X.X/ X.X/ X.X/0. 0. 0.5) 5) Question Which of the following items is allowable in a fume hood during an Organic Chemistry 1 Practical class?

Answer(s)    

Practical/Lecture notes or Lab manuals Mobile Phones/Tablet Post-Lab answer sheets Lab equipment (spatula, flasks, beakers, etc...)

Notes _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________

Qu Quest est estion ion 4 ((X.X/ X.X/ X.X/0. 0. 0.5) 5) Question The expectation in every Organic Chemistry 1 Practical class is that students must...? Please select the most appropriate response(s) from the answers below:

Answer(s)  ...return all equipment to the manner in which it was first used (e.g. cleaned, packed up, organized)  ...report ANY form of chemical spill to your demonstrators at ANY time during the practical.  ...participate in a class-wide effort to clean all equipment (e.g. flasks, beakers, spatulas, benches, etc) in the laboratory.  ...constantly self-check to ensure that safety goggles, enclosed shoes and lab coats are always being used at all times. Notes _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________

Ap Appen pen pendix dix Figure 1 – Selection of potential solvents with listed boiling points, formula and proper name....