The following statements are true except 1) Always tidy up your lab bench and make sure the equipment is ready for the next class. 2) Dispose solid chemicals down the sink. 3) Never insert your personal pipette into community reagent bottles. 4) Unless specifically directed otherwise, never return the excess reagent to the bottle

The following statements are true except 1) Always tidy up your lab bench and make sure the equipment is ready for the next class. 2) Dispose solid chemicals down the sink. 3) Never insert your personal pipette into community reagent bottles. 4) Unless specifically directed otherwise, never return the excess reagent to the bottle

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter4: Stoichiometry

Section: Chapter Questions

Problem 7CO

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Choose the correct option for each question below The following statements are true except 1) Always tidy up your lab bench and make sure the equipment is ready for the next class. 2) Dispose solid chemicals down the sink. 3) Never insert your personal pipette into community reagent bottles. 4) Each person working in the laboratory must wear a lab coat.
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When purifying a sample of aspirin that was produced in the lab, the impure aspirin sample should be dissolved in a very cold solvent, so that solid impurities can be filtered and analyzed the next day or the next week. True or False?
O Fash point of the given 272 °C=522 °F A flash point that is too low can be a fire hazard and may indicate contamination with Fire point of the given sample 320°C= 608°F more volatile components. Identify one volatile component in a petroleum mixture which may reduce the flash point of the mixture.
Which of the following is a correct practice in handling reagents? (A) Return any excess reagent to its source container. B Never insert spatulas, spoons, or knives into a bottle containing solid chemicals Dispose any liquid chemicals in the sink D Clean up any spills after finishing the laboratory work
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References] VISUALIZATION Polyester Formation II HO-A-OH HO-C-B-C-0H ethylene glycol (A group) terephthalic acid (B group) The starting materials for this reaction are ethylene glycol and terephthalic acid. The letters A and B represent organic groups that are unreactive. What reactive organic functional group does ethylene glycol (containing the A functional group) contain? Enter its name. Check (1 of 7)
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6. Explain the reason why a laboratory analyst should not return excess or unused chemicals back in their respective reagent bottles.
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