Chem Lab Final Questions and 100% CORRECT answers

How would you write the conversion reaction from oil to biodiesel? - ANSWERoil + alcohol + catalyst → biodiesel + glycerol + catalyst Which of the following hazards does not apply for methanol? - ANSWEROxidizing Wait, that's not the ideal place to put the methanol bottle! - ANSWERToo close to the opening Have a look at the Hazard Identification section by clicking the 'View Theory' button. Which P-sentence indicates why you should work in the fume hood when using methanol? - ANSWERP260 and P271 Methanol is volatile because it has a low boiling point. Have a look at the safety data sheet. What is the boiling point of methanol? - ANSWER65 o C There is some remaining sodium hydroxide-methanol solution that we have to dispose of. This solution poses several hazards, which of the following does NOT apply for the sodium hydroxide-methanol solution? - ANSWERExplosive Which of these hazards could be removed by adding small amounts of a certain solution? - ANSWERCorrosiveness Well done! How should you dispose of the remaining methanol solution? - ANSWERInto organic solvent waste Imagine the two following scenarios: 1. You pour a small amount of non-halogenated solvent into the halogenated waste. 2. You pour a small amount of halogenated solvent into the non-halogenated waste. Which damage analysis is right? - ANSWER2. is worse than 1. Which of the following solvents would be disposed in the halogenated solvent waste? - ANSWERDCM (Dichloromethane) Marie: I passed out because of the blast. What did you do after you pulled me out of the lab? - ANSWERTrigger alarm and break the circuit Marie: Why did you decide not to grab the fire extinguisher and fight the fire? - ANSWERToo dangerous Marie: I remember you struggled a bit with the hazard symbols. Do you remember the symbol for oxidizing reagents? - ANSWERA circle with flames Marie: You are a true safety expert! Do you remember the hazard symbol for oxidizing reagents? - ANSWERA circle with flames Why is it important to work in the fume hood during this step? - ANSWERMethanol gets very volatile at high temperature What do you notice about the components that make up the SI unit for kinetic energy? - ANSWERThey are the same as potential energy. Which position results in the highest amount of potential energy? You can keep playing with the track if you don't know the answer yet. - ANSWERHighest position Does the vehicle have zero energy at the bottom of the track? - ANSWERNo, because there is motion. Which mass of vehicle goes the fastest at the bottom? You can continue playing with the track if you don't know the answer yet. - ANSWERMass has no effect on velocity Since these 3 vehicles would all go the same speed at the bottom if released from the same height, would they all possess the same amount of kinetic energy? - ANSWERNo, because mass has an effect on kinetic energy In what form should the vehicle's energy be when it is at this point - ANSWERHalf potential energy and half kinetic energy Isolated systems maintain the same amount of total energy, even though it may be transformed from one type to another. Which factor below would reduce the total energy of this system over time? - ANSWERAir resistance You got that right! Now, what formula should you use to calculate the maximum velocity possible if a roller coaster begins at that height? - ANSWER3 How could you prevent this terrible situation from happening? - ANSWERAll options are correc