Nucleophilic Substitution Rxn Day 1_ CHEM-2071-001 Fall...

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Unformatted text preview: 10/23/2016 Nucleophilic Substitution Rxn Day 1: CHEM­2071­001 Fall 2016 Nucleophilic Substitution Rxn Day 1 Due Oct 24 at 6am Allowed Attempts 2 Points 25 Questions 25 Available until Oct 24 at 6am Time Limit 25 Minutes Instructions Take the Quiz Again Attempt History LATEST Attempt Time Score Attempt 1 6 minutes 24 out of 25 Correct answers are hidden. Score for this attempt: 24 out of 25 Submitted Oct 23 at 9:38pm This attempt took 6 minutes. Question 1 1 / 1 pts SN1 stands for: Unimolecular substitution reaction Unimolecular nitration reaction Bimolecular substitution reaction Saturday Night Life Question 2 1 / 1 pts In SN1 reaction the solvents are: Polar 1/9 10/23/2016 Nucleophilic Substitution Rxn Day 1: CHEM­2071­001 Fall 2016 Organic or inorganic Protic All listed are correct Question 3 1 / 1 pts In SN1 reactions, the rate determining step is defined by: The speed limit in your area The dissociation of the leaving group from the carbon it was attached to All listed are correct The formation of a carbanion Question 4 1 / 1 pts In SN1 reactions, the rate determining step is defined by: Strenghth of the electrophile GTA The ease of formation of the carbocation The ease of formation of the carbanion Question 5 1 / 1 pts With the increase of the solvent polarity in SN1 reactions: The rate of the reaction decreases 2/9 10/23/2016 Nucleophilic Substitution Rxn Day 1: CHEM­2071­001 Fall 2016 The percent yield increases as well The rate of the reaction does not change The rate of the reaction increases as well Incorrect Question 6 0 / 1 pts In SN1 reactions the ­OH is a bad leaving group unless: Is connected to a hydrogen Is connected to a secondary carbon Is connected to a tertiary carbon Is connected to a primary carbon Question 7 1 / 1 pts In the SN1 reaction the HCl is both: Catalyst and electrophile Nucleophile and product Solvent and catalyst Nucleophile and catalyst Question 8 1 / 1 pts The nucleophile has: One pair of lone electrons and ositive charge 3/9 10/23/2016 Nucleophilic Substitution Rxn Day 1: CHEM­2071­001 Fall 2016 Low electron density Dodge charger At least one lone pair or negative charge Question 9 1 / 1 pts A carbon atom from a carbon chain is considered to have electrophilic properties when: It has electron density wthdrawn away from it An electronegative substituent is attached to it Tends to react with species which exhibit nucleophilic properties All listed are correct Question 10 1 / 1 pts In SN1 reactions the products are: In a racemic mixture Exhibiting both retention and inversion Nonstereospecific All listed are correct Question 11 1 / 1 pts A racemic mixture is: An organic solution 4/9 10/23/2016 Nucleophilic Substitution Rxn Day 1: CHEM­2071­001 Fall 2016 A mixture where all components have equal parts A mixture of stereospecific components A mixture where at least one of the components is 50% of the total volume Question 12 1 / 1 pts From Figure 6.4 in the lab manual one could conclude that: The transition State has a lower potential energy from the reagent A carbanion is developed The transition State has a higher potential energy from the reagent and the product Substitution reactions are stereospecific Question 13 1 / 1 pts How much and what is the molarity of the HCl used in this experiment? 2.4 mL and 4M 2.4 mL and 12M 4 mL and 12M Eyeball the amount and who cares for the molarity?!? Question 14 1 / 1 pts The amount of 2­methyl­2­butanol used is: 2.4 mL 5/9 10/23/2016 Nucleophilic Substitution Rxn Day 1: CHEM­2071­001 Fall 2016 2.4 cubic cm 0.0024 L All listed are correct Question 15 1 / 1 pts The trivial name of today's product is: t­amyl bromide t­vynil chloride t­amyl chloride T­Pain Question 16 1 / 1 pts The IUPAC name of today's product is: 2­chloro­2­methylbutane 1­chloro­2­methylbutane t­amyl chloride t­butyl chloride Question 17 1 / 1 pts What is the first aid done to a person who had acid spilled in their eye? Use the sink and wash with soap and water for 15 minutes 6/9 10/23/2016 Nucleophilic Substitution Rxn Day 1: CHEM­2071­001 Fall 2016 Use the eye was and rinse with base for 15 minutes Use the eyewash and rinse with water for 15 minutes Cry for 15 minutes Question 18 1 / 1 pts After successful completion of the reaction one must rinse the organic layer with: Cold Water and 5% solution of potassium bicarbonate Cold Water and 5% solution of sodium carbonate Cold Water and 5% solution of sodium bicarbonate Cold Ethanol Question 19 1 / 1 pts Sodium bicarbonate has the formula: NaHCO3 H2O CaCl2 Na2CO3 Question 20 1 / 1 pts What is the drying agent used to remove residual water droplets from the organic product? Calcium chloride 7/9 10/23/2016 Nucleophilic Substitution Rxn Day 1: CHEM­2071­001 Fall 2016 Calcium bromide Anhydrous sodium carbonate Sodium bicarbonate Question 21 1 / 1 pts Perform simple distillation to: Eliminate the residual acid Determine the boiling point of the product Dry the product Separate the aqueous fractions Question 22 1 / 1 pts The appropriate outlet to plug in your sand bath is: 10 A Gray outlet What outlet?! 20 A Question 23 1 / 1 pts What is the setting that your rheostat must not exceed? 40 8/9 10/23/2016 Nucleophilic Substitution Rxn Day 1: CHEM­2071­001 Fall 2016 300 60 80 Question 24 1 / 1 pts Closed toe shoes in our labs are: Optional Mandatory Not stylish Not allowed Question 25 1 / 1 pts Boiling chips are: Optional when performing a reflux Short temepered chips Optional when performing a distillation Small gray stones that prevent liquids to superheat Quiz Score: 24 out of 25 9/9 ...
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