1
OChem 2 Lab Final UTA Questions with
Correct Answers | Updated (100% Correct
Answers)
Polymers Answer: Class of molecules that consist of repeating
structural units called monomers
Homopolymers Answer: Polymers that consist of a single repeating
monomer (M)
R-M-(M)n-M-R
Copolymers Answer: Polymers consisting of two distinct monomeric
units, M1 and M2, distributed at random in the polymer
R-M1-(M1-M2)n-M2-R
Chain Reaction Polymerization Answer: A chain reaction initiated by
a cation, anion, or free radical.
ex: polymerization of styrene to polystyrene [free radical
polymerization]
Initiator in the Polymerization Rxn of Styrene Answer: tert-butyl
peroxybenzoate, which upon thermal decomposition produces the
radicals necessary for .......?
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,2
Propagation Answer: Allows for growth of the polymer chain in free
radical polymerization
Radical Scavenger Answer: Donates a hydrogen atom to reactive
free radicals converting them into non-radicals, such as preventing
polymerization with trace amounts of oxygen
Tert-butylcatechol Answer: Radical Scavenger in Polymerization of
Styrene?
-results in phenol radical that's relatively unreactive and doesn't act
as an initiator
Removed Answer: tert-butylcatechol must be __________ from
styrene prior to use (can use basic solution to do so)
Acidic, Base Answer: The phenolic H atoms on tert-butylcatechol
are relatively _____ and can be deprotonated with ______ converting
the phenol into a water-soluble phenolate salt (polymerization
experiment)
Step-Growth Polymerization Answer: Involves a reaction between
two different difunctionalized monomers in which both
functionalities react to form the polymer
ex: Nylon 6,6 polymerization
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,3
Nylon-6,6 Answer: A type of polyamide prepared by reacting a
diacid or diacid chloride and a diamine, (such as Adipoyl chloride &
Hexamethylenediamine reacting with NaOH)
Nucleophilic Substitution Answer: Diacid chloride is commonly used
in the lab because it's more reactive toward _________ ___________ and
milder reaction conditions can be used (during polymerization of
Nylon-6,6)
HCl & NaCl Answer: A molecule of ______ & _____ are eliminated as
byproducts during polymerization of Nylon-6,6 and is neutralized by
a base
Organometallic Compounds Answer: Extremely useful and versatile
for synthesis
Substances in which there is a carbon-metal bond & doesn't include
compounds in which metal atoms are bonded to organic molecules
through bonds to O,N,S,P, etc
Would Not Answer: Metallic salts of carboxylic acids, phenols,
alcohols, etc _________ be defined as true organometallic compounds
Would Not Answer: Coordination compound of a transition metal
with ex. ethylenediamine or EDTA ______ be defined as true
organometallic compounds
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, 4
Main group and Transition Answer: Organometallic compounds are
known for both ________ _________ and ___________ metal elements ex.
Li, Mg, Cu, and Cd
Grignard Reagents Answer: Organomagnesium halides which are
commonly prepared by a reaction between Magnesium metal and
alkyl or aryl halide
They're important for organic synthesis and are convenient
precursors from which other other organometallic compounds may
be prepared
Addition to carbonyl compounds to produce alcohols Answer: The
reaction we preformed that's an example of one of the most familiar
applications of Grignard Reagents was?
How Grignard Reagents are typically formed Answer: These are
formed by exposure of an alkyl or aryl halide in diethyl ether
solution to magnesium metal, commonly in the form of Mg turnings
or shavings
Grignard Reactions Answer: These rxns are typically spontaneous
and exothermic once induction sets in; the combination of an
exothermic rxn and a solvent can be very volatile and highly
flammable
Do not add too much alkyl or aryl halide too early
© 2025 All rights reserved
OChem 2 Lab Final UTA Questions with
Correct Answers | Updated (100% Correct
Answers)
Polymers Answer: Class of molecules that consist of repeating
structural units called monomers
Homopolymers Answer: Polymers that consist of a single repeating
monomer (M)
R-M-(M)n-M-R
Copolymers Answer: Polymers consisting of two distinct monomeric
units, M1 and M2, distributed at random in the polymer
R-M1-(M1-M2)n-M2-R
Chain Reaction Polymerization Answer: A chain reaction initiated by
a cation, anion, or free radical.
ex: polymerization of styrene to polystyrene [free radical
polymerization]
Initiator in the Polymerization Rxn of Styrene Answer: tert-butyl
peroxybenzoate, which upon thermal decomposition produces the
radicals necessary for .......?
© 2025 All rights reserved
,2
Propagation Answer: Allows for growth of the polymer chain in free
radical polymerization
Radical Scavenger Answer: Donates a hydrogen atom to reactive
free radicals converting them into non-radicals, such as preventing
polymerization with trace amounts of oxygen
Tert-butylcatechol Answer: Radical Scavenger in Polymerization of
Styrene?
-results in phenol radical that's relatively unreactive and doesn't act
as an initiator
Removed Answer: tert-butylcatechol must be __________ from
styrene prior to use (can use basic solution to do so)
Acidic, Base Answer: The phenolic H atoms on tert-butylcatechol
are relatively _____ and can be deprotonated with ______ converting
the phenol into a water-soluble phenolate salt (polymerization
experiment)
Step-Growth Polymerization Answer: Involves a reaction between
two different difunctionalized monomers in which both
functionalities react to form the polymer
ex: Nylon 6,6 polymerization
© 2025 All rights reserved
,3
Nylon-6,6 Answer: A type of polyamide prepared by reacting a
diacid or diacid chloride and a diamine, (such as Adipoyl chloride &
Hexamethylenediamine reacting with NaOH)
Nucleophilic Substitution Answer: Diacid chloride is commonly used
in the lab because it's more reactive toward _________ ___________ and
milder reaction conditions can be used (during polymerization of
Nylon-6,6)
HCl & NaCl Answer: A molecule of ______ & _____ are eliminated as
byproducts during polymerization of Nylon-6,6 and is neutralized by
a base
Organometallic Compounds Answer: Extremely useful and versatile
for synthesis
Substances in which there is a carbon-metal bond & doesn't include
compounds in which metal atoms are bonded to organic molecules
through bonds to O,N,S,P, etc
Would Not Answer: Metallic salts of carboxylic acids, phenols,
alcohols, etc _________ be defined as true organometallic compounds
Would Not Answer: Coordination compound of a transition metal
with ex. ethylenediamine or EDTA ______ be defined as true
organometallic compounds
© 2025 All rights reserved
, 4
Main group and Transition Answer: Organometallic compounds are
known for both ________ _________ and ___________ metal elements ex.
Li, Mg, Cu, and Cd
Grignard Reagents Answer: Organomagnesium halides which are
commonly prepared by a reaction between Magnesium metal and
alkyl or aryl halide
They're important for organic synthesis and are convenient
precursors from which other other organometallic compounds may
be prepared
Addition to carbonyl compounds to produce alcohols Answer: The
reaction we preformed that's an example of one of the most familiar
applications of Grignard Reagents was?
How Grignard Reagents are typically formed Answer: These are
formed by exposure of an alkyl or aryl halide in diethyl ether
solution to magnesium metal, commonly in the form of Mg turnings
or shavings
Grignard Reactions Answer: These rxns are typically spontaneous
and exothermic once induction sets in; the combination of an
exothermic rxn and a solvent can be very volatile and highly
flammable
Do not add too much alkyl or aryl halide too early
© 2025 All rights reserved
