Quiz 3 Winter 2016

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Quiz 3 Winter 2016

Postby Chem_Mod » Fri Feb 19, 2016 2:31 pm

I have posted the detailed midterm solutions on my class website at:
https://lavelle.chem.ucla.edu/class-websites/chem14b/

For week 9, Quiz 3 covers from page 76 in the course reader to the end of page 99.

In the organic textbook, Introduction to Organic Chemistry, it is:

Thermodynamics and Kinetics of Organic Reactions
Ch 4.1 to 4.4
Problems: 1-10, 23-40

Structure and Naming of Organic Molecules
Part 1: Hydrocarbons
Ch 1, Sections 1-6 and 11
Problems: 1-6, 9-17, 21-29

Maisha 2L
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Re: Quiz 3 Winter 2016

Postby Maisha 2L » Sun Feb 21, 2016 11:59 pm

Chem_Mod wrote:I have posted the detailed midterm solutions on my class website at:
https://lavelle.chem.ucla.edu/class-websites/chem14b/

For week 9, Quiz 3 covers from page 76 in the course reader to the end of page 99.

In the organic textbook, Introduction to Organic Chemistry, it is:

Thermodynamics and Kinetics of Organic Reactions
Ch 4.1 to 4.4
Problems: 1-10, 23-40

Structure and Naming of Organic Molecules
Part 1: Hydrocarbons
Ch 1, Sections 1-6 and 11
Problems: 1-6, 9-17, 21-29


Are these just the homework problems, or are they also the only problems important for the quiz?

004569922
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Re: Quiz 3 Winter 2016

Postby 004569922 » Mon Feb 22, 2016 8:02 pm

Are we going to be required to know the structures of basic compounds such as Isoprene, Propyne, Carvone, etc.? Or will they be given to us?

nikisepanj
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Re: Quiz 3 Winter 2016

Postby nikisepanj » Tue Feb 23, 2016 11:12 pm

this entails that quiz 3 includes the enzyme part of kinetics, correct?

Dahriel Aron 3A
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Re: Quiz 3 Winter 2016

Postby Dahriel Aron 3A » Wed Feb 24, 2016 5:33 pm

I was wondering if anything from the end of ch 15 will be on the quiz

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Wed Feb 24, 2016 9:32 pm

Maisha 2L wrote:
Chem_Mod wrote:I have posted the detailed midterm solutions on my class website at:
https://lavelle.chem.ucla.edu/class-websites/chem14b/

For week 9, Quiz 3 covers from page 76 in the course reader to the end of page 99.

In the organic textbook, Introduction to Organic Chemistry, it is:

Thermodynamics and Kinetics of Organic Reactions
Ch 4.1 to 4.4
Problems: 1-10, 23-40

Structure and Naming of Organic Molecules
Part 1: Hydrocarbons
Ch 1, Sections 1-6 and 11
Problems: 1-6, 9-17, 21-29


Are these just the homework problems, or are they also the only problems important for the quiz?


Both

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Wed Feb 24, 2016 9:34 pm

004569922 wrote:Are we going to be required to know the structures of basic compounds such as Isoprene, Propyne, Carvone, etc.? Or will they be given to us?


Given the IUPAC name you can figure out the structure.

Given the common name you will not be expected to know the structure.

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Wed Feb 24, 2016 9:36 pm

nikisepanj wrote:this entails that quiz 3 includes the enzyme part of kinetics, correct?


Focus on what my lecture notes covered and the homework problems I assigned.

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Wed Feb 24, 2016 9:37 pm

Dahriel Aron 3A wrote:I was wondering if anything from the end of ch 15 will be on the quiz


Yes. See lecture notes in course reader from page 76 onwards.

Masahiro Yabe 2H
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Re: Quiz 3 Winter 2016

Postby Masahiro Yabe 2H » Fri Feb 26, 2016 12:54 am

I was also wondering whether the stuff that we didn't cover in the last chapters are going to be on quiz 3, such as arrhenius equation.

mh2019
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Re: Quiz 3 Winter 2016

Postby mh2019 » Fri Feb 26, 2016 12:36 pm

So are functional groups not on the quiz?

Nicole Filbert 1D
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Re: Quiz 3 Winter 2016

Postby Nicole Filbert 1D » Fri Feb 26, 2016 3:39 pm

When being asked to name a compound, are we going to have to give the IUPAC and common name? Or, is just the IUPAC name okay? (For the final also?)

Sophia Xu 3F
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Re: Quiz 3 Winter 2016

Postby Sophia Xu 3F » Sat Feb 27, 2016 5:39 pm

Does the quiz cover functional group material?

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Sat Feb 27, 2016 9:50 pm

Please read the announcement: "Quiz 3 covers from page 76 in the course reader to the end of page 99."

Typically IUPAC names are asked. If question does not specify then IUPAC or common name is fine.

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Sat Feb 27, 2016 10:42 pm

Masahiro Yabe 2H wrote:I was also wondering whether the stuff that we didn't cover in the last chapters are going to be on quiz 3, such as arrhenius equation.


Perhaps you meant to ask:
Are the Kinetics topics that were not covered in quiz 2, going to be in quiz 3? For example, the Arrhenius equation.

Answer: Yes

See pages in original post at top of this thread.

Cynthia Anderson 3A
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Re: Quiz 3 Winter 2016

Postby Cynthia Anderson 3A » Sun Feb 28, 2016 5:49 pm

Some of the homework problems cover trans- and cis-, do we need to know how to do these even though they weren't covered in lecture?

Ulysis Baal 4J
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Re: Quiz 3 Winter 2016

Postby Ulysis Baal 4J » Sun Feb 28, 2016 7:39 pm

Sophia Xu 3F wrote:Does the quiz cover functional group material?

No, functional groups are not covered from pages 67 to 99.

Kimberly Wagas 1H
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Re: Quiz 3 Winter 2016

Postby Kimberly Wagas 1H » Mon Feb 29, 2016 9:55 am

Will we have to know alkyl and aryl carbanions for the quiz?

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Mon Feb 29, 2016 2:03 pm

Cynthia Anderson 3A wrote:Some of the homework problems cover trans- and cis-, do we need to know how to do these even though they weren't covered in lecture?


Geometric isomers are not in quiz 3.

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Mon Feb 29, 2016 2:04 pm

Kimberly Wagas 1H wrote:Will we have to know alkyl and aryl carbanions for the quiz?


No.

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Mon Feb 29, 2016 2:05 pm

Alkenes and alkynes could be on quiz 3 as part of naming.
But geometric isomers (CIS/TRANS Z/E) will not be on quiz 3 as I covered them in todays lecture.

sandyh9711
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Re: Quiz 3 Winter 2016

Postby sandyh9711 » Mon Feb 29, 2016 4:49 pm

Do we have to memorize all the prefixes for alkane nomenclature, for instance, meth- for 1 carbon atom, prop- for 3 carbons, and all the way down to eicos- for 20 carbons?

Akodjanian
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Re: Quiz 3 Winter 2016

Postby Akodjanian » Mon Feb 29, 2016 6:00 pm

From Kinetics is the only part on the quiz going to be the Arrhenius equation? Or rate law and all that might be on it too?

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Mon Feb 29, 2016 6:40 pm

sandyh9711 wrote:Do we have to memorize all the prefixes for alkane nomenclature, for instance, meth- for 1 carbon atom, prop- for 3 carbons, and all the way down to eicos- for 20 carbons?


As commented in class, only the first 12.

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Mon Feb 29, 2016 6:42 pm

Akodjanian wrote:From Kinetics is the only part on the quiz going to be the Arrhenius equation? Or rate law and all that might be on it too?


Quiz 3 covers from page 76 in the course reader to the end of page 99.

Ryan Distaso 3C
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Re: Quiz 3 Winter 2016

Postby Ryan Distaso 3C » Mon Feb 29, 2016 8:45 pm

For Quiz 2, the formula sheet did not exactly match up with the one that comes with the course reader. The integrated rate laws were not explicitly labelled as being for first order, second order, and zero order and it seemed like we were somewhat expected to have them memorized. Will this be the case for Quiz 3 as well?

Sophia Xu 3F
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Re: Quiz 3 Winter 2016

Postby Sophia Xu 3F » Mon Feb 29, 2016 8:49 pm

when we are asked to "draw the structure" of some molecule, are we drawing the line structure or a structure that shows the atoms?

Izzy Ick 4B
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Re: Quiz 3 Winter 2016

Postby Izzy Ick 4B » Mon Feb 29, 2016 10:53 pm

Do we need to know the information from pages 79-81 in the course reader?

Daniela Contreras 3E
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Re: Quiz 3 Winter 2016

Postby Daniela Contreras 3E » Tue Mar 01, 2016 1:33 am

Are we going to need to know common names for substituents such as neo, text etc or just IUPAC names and prefixes?

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Tue Mar 01, 2016 10:35 am

Ryan Distaso 3C wrote:For Quiz 2, the formula sheet did not exactly match up with the one that comes with the course reader. The integrated rate laws were not explicitly labelled as being for first order, second order, and zero order and it seemed like we were somewhat expected to have them memorized. Will this be the case for Quiz 3 as well?


Equations are given in all quiz and exams in my Chem 14A and 14B classes. But they are never labeled. Students need to be able to identify them, which we spent a week doing in class for the first order, second order, and zero order reactions.

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Tue Mar 01, 2016 10:36 am

Sophia Xu 3F wrote:when we are asked to "draw the structure" of some molecule, are we drawing the line structure or a structure that shows the atoms?


If the question explicitly states draw a line structure then it must be a line structure.
If a question asks to draw a Lewis structure then it must be a Lewis structure.
If a question ask to draw a structure then we will accept any valid structure.

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Tue Mar 01, 2016 10:38 am

Izzy Ick 4B wrote:Do we need to know the information from pages 79-81 in the course reader?


Yes. But not a big emphasis.

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Tue Mar 01, 2016 10:41 am

Daniela Contreras 3E wrote:Are we going to need to know common names for substituents such as neo, text etc or just IUPAC names and prefixes?


Both are used in Chem 14C. My objective is to prepare you as best I can for Chem 14C. Therefore yes.

Andrew Kolodziej 1C
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Re: Quiz 3 Winter 2016

Postby Andrew Kolodziej 1C » Tue Mar 01, 2016 11:23 am

Is it acceptable just to use IUPAC, or will we lose points on the quiz/final if we do not use common names?

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Tue Mar 01, 2016 12:20 pm

Andrew Kolodziej 1C wrote:Is it acceptable just to use IUPAC, or will we lose points on the quiz/final if we do not use common names?


If the question does not specify give the IUPAC name then any correct name is fine.

Daniela Contreras 3E
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Re: Quiz 3 Winter 2016

Postby Daniela Contreras 3E » Tue Mar 01, 2016 7:45 pm

For the quiz will we have to use the line diagrams when asked to draw a molecule or could we just use lewis structures?

Daniela Contreras 3E
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Re: Quiz 3 Winter 2016

Postby Daniela Contreras 3E » Tue Mar 01, 2016 7:55 pm

On page 97 in the course reader why are one of the examples "ethyl methyl ether when I thought ether was a functional group which is not on the quiz

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Tue Mar 01, 2016 9:21 pm

Daniela Contreras 3E wrote:For the quiz will we have to use the line diagrams when asked to draw a molecule or could we just use lewis structures?


I already answered this question. See above.

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Tue Mar 01, 2016 9:24 pm

Daniela Contreras 3E wrote:On page 97 in the course reader why are one of the examples "ethyl methyl ether when I thought ether was a functional group which is not on the quiz


Functional groups are not covered in quiz 3, even though we did some common names (as you correctly point out).

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Tue Mar 01, 2016 9:31 pm

Note: Quiz 3 Preparation Answers had two errors. They should be:

Q2. 3-ethyl-2,2,4-trimethyl-pentane

Q5. 1-bromo-3-iodocyclohexane

204635822
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Re: Quiz 3 Winter 2016

Postby 204635822 » Wed Mar 02, 2016 7:46 pm

Some of the TAs/UAs say that halogens are put in alphabetical order while others say that halogens are named by mass. Which is correct?

204635822
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Re: Quiz 3 Winter 2016

Postby 204635822 » Wed Mar 02, 2016 8:59 pm

Do we have to know the names of nucleophiles like Azide or thiosulfate, or do we just have to recognize that they are nucleophiles due to lone pair electrons?

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Wed Mar 02, 2016 9:54 pm

204635822 wrote:Some of the TAs/UAs say that halogens are put in alphabetical order while others say that halogens are named by mass. Which is correct?


Halogens are always listed in alphabetical order when naming.

For geometric isomers, when determining cis/trans Z/E, one uses atomic number to determine priority for the atoms attached to each C atom in the double bond.
But this has nothing to do with naming and numbering of halogens.

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Wed Mar 02, 2016 9:58 pm

204635822 wrote:Do we have to know the names of nucleophiles like Azide or thiosulfate, or do we just have to recognize that they are nucleophiles due to lone pair electrons?


Only recognize that they are nucleophiles due to available lone pair electrons.

aissatou10
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Re: Quiz 3 Winter 2016

Postby aissatou10 » Fri Mar 04, 2016 10:09 am

Are functional groups going to be in quiz 3?

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Re: Quiz 3 Winter 2016

Postby Chem_Mod » Fri Mar 04, 2016 10:22 am

aissatou10 wrote:Are functional groups going to be in quiz 3?


No.

Michelle Yu 1L
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Re: Quiz 3 Winter 2016

Postby Michelle Yu 1L » Fri Mar 04, 2016 10:22 am

functional group is not on the quiz

204643191
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Re: Quiz 3 Winter 2016

Postby 204643191 » Sat Mar 12, 2016 8:30 am

I got my quiz 3 back and for one of the questions, they asked us to:

Determine the systematic name for the following organic molecule:

and the structure was a cyclopentane with 2 methyls and a bromine attached. When naming it though, I got marked off when I called the structure a cyclopentane even though there were five carbons all connected in a circle and the structure had no double or triple bonds, it was had those 3 substituents connected to it. Would the substituents cause the name of the structure to change or am I right on this?

204643191
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Re: Quiz 3 Winter 2016

Postby 204643191 » Sat Mar 12, 2016 8:41 am

204643191 wrote:I got my quiz 3 back and for one of the questions, they asked us to:

Determine the systematic name for the following organic molecule:

and the structure was a cyclopentane with 2 methyls and a bromine attached. When naming it though, I got marked off when I called the structure a cyclopentane even though there were five carbons all connected in a circle and the structure had no double or triple bonds, it was had those 3 substituents connected to it. Would the substituents cause the name of the structure to change or am I right on this?


I meant tert-butyl, not propyl, so it looked like a t-shaped structure was connected to the cyclopentane, but I got marked wrong on the cyclopentane part. Can anyone explain why that would be wrong?


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