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d Chang Golds
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Sim-ChemistryhLabhFULL
How would you write the conversion reaction from oil to biodiesel?
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A) Oil + alcohol + catalyst -> biodiesel + glycerol + catalyst
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B) Oil + alcohol + catalyst -> biodiesel
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C)Biofuel + alcohol + catalyst -> catalyst + biofuel + glycerol
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D)Oil + catalyst -> biodiesel + glycerol + alcohol - ANSWER> Oil + alcohol
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+ catalyst -> biodiesel + glycerol + catalyst
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Which of the following hazards does not apply for methanol?
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A) Flammable
B) Oxidizing
C) Health Hazard h
D) Toxic - ANSWER> Oxidizing h h h
Which P- h
sentence indicates why you should work in the fume hood when using me
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thanol?
A) P363 and P330 h h
B) P301 and P310 h h
C) P210 and P233 h h
D) P260 and P271 - ANSWER> P260 and P271
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Methanol is volatile because it has a low boiling point. Have a look at the s
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afety sheet. What is the boiling point of methanol?
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A) 54 degrees Celsius
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B) 76 degrees Celsius
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C) 87 degrees Celsius
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D) 65 degrees Celsius - ANSWER> 65 degrees Celsius
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Why is it important to work in the fume hood during this step?
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,A) Methanol gets very volatile at high temperatures. h h h h h h
B) The magnetic stirrer splashes base in all directions
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C) Sodium hydroxide is flammable h h h
D) Produced biodiesel is explosive - h h h h
ANSWER> Methanol gets very volatile at high temperatures.
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There is some remaining sodium hydroxide-
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methanol solution that we have to dispose of. This solution poses several
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hazards, which of the following does NOT apply for the sodium hydroxide
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methanol solution? A)Explosive h h
B)Corrosive C)Flam h
mable
D)Toxic - ANSWER> Explosive h h h
Which of these hazards could be removed by adding small amounts of cer
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tain solution?
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A) Flammability h
B)Toxicity C)Cor h
rosiveness
D)Neither of them - ANSWER> Corrosiveness h h h h h
How should you dispose of the remaining methanol solution? A)Evaporat
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e it in the fume hood
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B) Into the organic solvent waste
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C) Flush it down the sink h h h h
D) Burn it inside the hood - ANSWER> Into the organic solvent waste
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Imagine the two following scenarios:h h h h
You pour a small amount of non-
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halogenated solvent into the halogenated waste. h h h h h
You pour a small amount of halogenated solvent into the non-
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hhalogenated waste. h
Which damage analysis is right?
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, A) They are equally bad h h h
B) Small amounts do not matter - both are no problem
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C) 1 is worse than 2
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D) 2 is worse than 1 - ANSWER> 2 is worse than 1
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Which of the following solvents would be disposed in the halogenated sol
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vent waste? h
A) Hexane h
B)Acetone
C) DCM (Dichloromethane) h
D) Ethanol - ANSWER> DCM (Dichloromethane) h h h h
"I passed out because of the blast. What did you do after you pulled me ou
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t of the lab?"
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A) Extinguish the fire h h
B) Close the fume hood h h h
C) Evacuate the building h h
D) Trigger the alarm and break the circuit - h h h h h h h
ANSWER> Trigger the alarm and break the circuit
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"Why did you decide not to grab the fire extinguisher and fight the fir
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e?"
A) I needed to save my LabPad
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B) It's electrical and I already turned it off
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C) There was no extinguisher h h h
D) Too dangerous - ANSWER> Too dangerous
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Do you remember the symbol for oxidizing reagents?
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A) An exclamation mark
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B) A square with fragments
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C) A circle with flames
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D) A person with symptoms - ANSWER> A circle with flames
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