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CHEM 241 Ch 16 Part 2 Questions And Answers Latest Update 2024
Substituents on an aromatic ring can either increase or decrease the reactivity of the ring toward electrophiles. This effect is a result of the balance between - correct answers induction resonance Substituents may withdraw or donate electron density from/to the aromatic ring by induction, which depends on the ______ and/or ______ of the atom or group attached to the ring. - correct answers polarizability electronegativity Match each type of substituent to the correct inductive effect ...
- Exam (elaborations)
- • 23 pages •
Substituents on an aromatic ring can either increase or decrease the reactivity of the ring toward electrophiles. This effect is a result of the balance between - correct answers induction resonance Substituents may withdraw or donate electron density from/to the aromatic ring by induction, which depends on the ______ and/or ______ of the atom or group attached to the ring. - correct answers polarizability electronegativity Match each type of substituent to the correct inductive effect ...
Chem 241 Lab4--Reactivities Of Aromatic Compounds Questions And Answers Latest Update 2024
Safety of HBr, Br2, Acetic Acid - correct answers all corrosive Br2 safety/characteristic - correct answers strong oxidizing agent -damage all membranes --volatile Clean up bromine with what? Quench bromine with what? Why does this quench? Why is this the agent we use in this lab? - correct answers Sodium bisulfite --strong reducing agent (counteracts effects of bromine being a strong oxidizing agent)--turns bromine into bromide. We use this agent in this lab b/c the bromine is water so...
- Exam (elaborations)
- • 2 pages •
Safety of HBr, Br2, Acetic Acid - correct answers all corrosive Br2 safety/characteristic - correct answers strong oxidizing agent -damage all membranes --volatile Clean up bromine with what? Quench bromine with what? Why does this quench? Why is this the agent we use in this lab? - correct answers Sodium bisulfite --strong reducing agent (counteracts effects of bromine being a strong oxidizing agent)--turns bromine into bromide. We use this agent in this lab b/c the bromine is water so...
Chem 241 L Exam 2 Chromatography Questions And Answers Latest Update 2024
Goals of separation - correct answers Recovery of product- catching the desired solute after separation Purity of product- how many and how much of various components Type of Chromatography - correct answers Partioning= liquid SP, liquid or gas MP Adsorption (Chemical sticking)- solid SP, liquid or gas MP Ion-Exchange- bonded anion(-) or action (+) SP, liquid MP Molecular Exclusion (size exclusion, gel permeation)-pores SP, liquid MP Affinity- Antigen/Antibody SP, liquid MP Solvent do...
- Exam (elaborations)
- • 13 pages •
Goals of separation - correct answers Recovery of product- catching the desired solute after separation Purity of product- how many and how much of various components Type of Chromatography - correct answers Partioning= liquid SP, liquid or gas MP Adsorption (Chemical sticking)- solid SP, liquid or gas MP Ion-Exchange- bonded anion(-) or action (+) SP, liquid MP Molecular Exclusion (size exclusion, gel permeation)-pores SP, liquid MP Affinity- Antigen/Antibody SP, liquid MP Solvent do...
Chem 241: Chp. 24: Gas Chromatography Questions And Answers Latest Update 2024
carrier gas - correct answers mobile phase gas in gas chromatography cold trapping - correct answers splitless gas chromatography injection technique in which solute is condensed far below its boiling point in narrow band at the start of the column electron capture detector - correct answers gas chromatography detector that is particularly sensitive to compounds with halogen atoms, nitro groups, and other groups with high electron affinity flame ionization detector - correct answers A g...
- Exam (elaborations)
- • 4 pages •
carrier gas - correct answers mobile phase gas in gas chromatography cold trapping - correct answers splitless gas chromatography injection technique in which solute is condensed far below its boiling point in narrow band at the start of the column electron capture detector - correct answers gas chromatography detector that is particularly sensitive to compounds with halogen atoms, nitro groups, and other groups with high electron affinity flame ionization detector - correct answers A g...
Chem 241 Chapter 7 Questions And Answers Latest Update 2024
NaH - correct answers SB/WN BDN - correct answers SB/WN DBU - correct answers SB/WN -OtBu - correct answers SB/WN (Bulky base) OH- - correct answers SB/SN
- Exam (elaborations)
- • 3 pages •
NaH - correct answers SB/WN BDN - correct answers SB/WN DBU - correct answers SB/WN -OtBu - correct answers SB/WN (Bulky base) OH- - correct answers SB/SN
CHEM 241 UW Safety Quizes Questions And Answers Latest Update 2024
When are you allowed to enter the lab? (Choose all that apply) - correct answers When it is the official lab start time and your TA has arrived, When you are wearing goggles and a lab coat When must you wear safety goggles in lab? (Choose 1) - correct answers At all times, including when using computers in the instrument room What clothing is NOT allowed to be worn in lab? (Choose all that apply) - correct answers Sandals and other open toed shoes, Shorts Which of the following actions ...
- Exam (elaborations)
- • 8 pages •
When are you allowed to enter the lab? (Choose all that apply) - correct answers When it is the official lab start time and your TA has arrived, When you are wearing goggles and a lab coat When must you wear safety goggles in lab? (Choose 1) - correct answers At all times, including when using computers in the instrument room What clothing is NOT allowed to be worn in lab? (Choose all that apply) - correct answers Sandals and other open toed shoes, Shorts Which of the following actions ...
Chapter 24 Vocab Chem 241 UNC Questions And Answers Latest Update 2024
carrier gas - correct answers MP gase in GC cold trapping - correct answers Splitless gas chromatography injection technique in which solute is condensed far below its boiling point in a narrow band at the start of the column. electron capture detector - correct answers gas chromatography detector that is particularly sensitive to compounds with halogen atoms, nitro groups, and other groups with high electron affinity flame ionization dectector - correct answers gas chromatography detec...
- Exam (elaborations)
- • 5 pages •
carrier gas - correct answers MP gase in GC cold trapping - correct answers Splitless gas chromatography injection technique in which solute is condensed far below its boiling point in a narrow band at the start of the column. electron capture detector - correct answers gas chromatography detector that is particularly sensitive to compounds with halogen atoms, nitro groups, and other groups with high electron affinity flame ionization dectector - correct answers gas chromatography detec...
Chem 241 Acid/Base & Solvent/Solvent Extraction Questions And Answers Latest Update 2024
Fraction of Dissociation - correct answers the fraction of the acid in the conjugate base form (A-). [A-] / [A-]+[HA] or [A-]/F Fraction of Association - correct answers the fraction of the base in the conjugate acid form [BH+]. [BH+] / [BH+]+[B] or [BH+]/F Strong Acids - correct answers HClO4, H2SO4, HNO3, HCl, HI, HBr Strong Bases - correct answers LiOH, NaOH, KOH, RbOH, CsOH Ca(OH)2, Mg(OH)2, Ba(OH)2, Sr(OH)2 What should I do if I have a dilute strong acid or base? (10e-6<F...
- Exam (elaborations)
- • 11 pages •
Fraction of Dissociation - correct answers the fraction of the acid in the conjugate base form (A-). [A-] / [A-]+[HA] or [A-]/F Fraction of Association - correct answers the fraction of the base in the conjugate acid form [BH+]. [BH+] / [BH+]+[B] or [BH+]/F Strong Acids - correct answers HClO4, H2SO4, HNO3, HCl, HI, HBr Strong Bases - correct answers LiOH, NaOH, KOH, RbOH, CsOH Ca(OH)2, Mg(OH)2, Ba(OH)2, Sr(OH)2 What should I do if I have a dilute strong acid or base? (10e-6<F...
Organic Chemistry 241 Exam Questions And Answers Latest Update 2024
If you add more than a minimum amount of ethanol when recrysallizing, how does that affect % recovery - correct answers Less crystals, % recovery decreases List 2 features of the mp of an impure compound - correct answers -Lower -Broad range List 2 features of the mp of a pure compound - correct answers -correct mp -narrow range 2 Features of a good solvent for recrystallization - correct answers -insoluble at colder temps -soluble at hot temps -All impurities soluble at all temper...
- Exam (elaborations)
- • 15 pages •
If you add more than a minimum amount of ethanol when recrysallizing, how does that affect % recovery - correct answers Less crystals, % recovery decreases List 2 features of the mp of an impure compound - correct answers -Lower -Broad range List 2 features of the mp of a pure compound - correct answers -correct mp -narrow range 2 Features of a good solvent for recrystallization - correct answers -insoluble at colder temps -soluble at hot temps -All impurities soluble at all temper...
Organic Chemistry-CHEM 241- FA_ Questions And Answers Latest Update 2024
Alkanes - correct answers - Single bond -Chemical structure- CnH2n+2 First four alkanes - correct answers -Methane(CH4) -Ethane (c2H6) -Propane(C3H8) -Butane(C4H10) Alkenes and Alkynes - correct answers -contains double bonds Alkynes - correct answers -contains triple bonds Alcohols - correct
- Exam (elaborations)
- • 1 pages •
Alkanes - correct answers - Single bond -Chemical structure- CnH2n+2 First four alkanes - correct answers -Methane(CH4) -Ethane (c2H6) -Propane(C3H8) -Butane(C4H10) Alkenes and Alkynes - correct answers -contains double bonds Alkynes - correct answers -contains triple bonds Alcohols - correct
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