CHEM 241
Drexel University
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CHEM 241 Exam 2 Questions And Answers Latest Update 2024
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increase dsp (A term) - correct answers A term increases 
 
increase dsp (B term) - correct answers B term unchanged 
 
increase dsp (Cs term) - correct answers Cs term increases 
 
increase dsp (Cm term) - correct answers Cm term unchanged 
 
OTC resolution - correct answers higher 
 
OTC analysis time - correct answers shorter 
 
OTC sensitivity - correct answers higher 
 
OTC sample capacity - correct answers lower 
 
increase dsp (plate height) -
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Chem 241L Pollev Questions And Answers Latest Update 2024
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What form of bromo blue was soluble in the organic layer? 
 
a. Acidic 
b. Basic 
c. Both 
d. Neither - correct answers acidic bc its neutral 
 
What form of bromo blue was soluble in the aqueous layer? 
 
a. Acidic 
b. Basic 
c. Both 
d. Neither - correct answers basic bc it has charge on it and the aq layer in lab was polar and the basic layer was also polar 
 
when looking at the full spectra of the promo blue ranging from ph 5 to 10, the absorbance values converge. What is this point called?...
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CHEM 241: Chapter 26: Chromatographic Methods And Capillary Electrophoresis Questions And Answers Latest Update 2024
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In _________-_________ chromatography, retention is based n the attraction between solute ions and charged sites bounds to the stationary phase. - correct answers ion-exchange 
 
In _________ exchangers, positively charged groups on the stationary phase attract anions - correct answers anion 
 
_________ exchangers contain covalently bonds, negatively charged sites that attract cations - correct answers cation 
 
_________ are amorphous (noncrystalline) particles of organic materials. - correct ...
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CHEM 241 Ch 16 Part 2 Questions And Answers Latest Update 2024
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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 ...
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Chem 241 Lab4--Reactivities Of Aromatic Compounds Questions And Answers Latest Update 2024
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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...
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Chem 241 L Exam 2 Chromatography Questions And Answers Latest Update 2024
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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...
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Chem 241: Chp. 24: Gas Chromatography Questions And Answers Latest Update 2024
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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...
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Chem 241 Chapter 7 Questions And Answers Latest Update 2024
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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
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CHEM 241 UW Safety Quizes Questions And Answers Latest Update 2024
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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 ...
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Chapter 24 Vocab Chem 241 UNC Questions And Answers Latest Update 2024
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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...
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