Test 3

[Jaedyn_Birchmier3F]

I was just wondering if the only topics on test 3 are going to be VSEPR and hybridization. These seem to be the only two concepts covered in the Lavelle's lectures.

[Hedi Zappacosta 1E]

I think so. Everything we've learned after the material that was on the midterm.

[Katie Sy 1L]

i believe so and possibly some past topics may be included but i'm not sure about that

[DavidEcheverri3J]

Will we also need to know the degrees of the shapes?

[alanaarchbold]

I think we need to be able to identify shapes so we might have to know the bond angles

[Emily Li 4A]

Will we also need to know the degrees of the shapes?

I think it's very likely that we have to know them, but at least we can use simple math to find angles in most of the shapes.

[becca_vandyke_4b]

I thought he said that we will not need to know bond angle. That we will be asked to draw the Lewis Structure and then name the shape.

[Sarah Bui 2L]

I thought he said that we will not need to know bond angle. That we will be asked to draw the Lewis Structure and then name the shape.

I think he doesn't expect us to know the exact bond angle (like 107)' but we should know and write it as less than 109.5' for something like the trigonal pyramid shape.

[Hanlin Zhu 4G]

I think different intermolecular interactions is also included in the test.

[Sona Hakobyan 3J]

I think different intermolecular interactions is also included in the test.

Can you elaborate on this?

[405021651]

Will it be only topics on outline 3?

[805169754]

Will it be only topics on outline 3?

I think the test would also include topics from outline 4 which is about VSEPR and hybridization

[Ethan Yi 1K]

so is the test only on the things we learned after the last midterm?

[kateminden]

so is the test only on the things we learned after the last midterm?

Hi! Dr. Lavelle posted this announcement on his website: "Test 3 covers: End of Bonding from 3.12 (6 Ed.) and from 2D (7 Ed.); and all of Molecular Shape and Structure (see Syllabus and Outlines for details)."

[Hanlin Zhu 4G]

I think the comparative strength of ion-ion, ion-dipole, dipole-dipole, dipole-induced dipole, and dispersion interactions may also on the test. Also I remember there are specific factors affecting induced dipole-induced dipole forces.

[Julia Lee]

I believe intermolecular interactions, bond strengths & lengths, VSEPR, molecular shape & structure, sigma & pi bonds, and hybridization are all the topics that are going to be covered on test 3.

[Pritish Patil 1K]

It says on the website to know the End of Bonding 6th(3.12), 7th(2D) and all of Molecular Shape and Structure.

[Liset Rivera 3A]

I believe it will be because it was the only thing we have learned after the midterm.

[Ariana Morales]

How do we know if test 3 will be on everything we covered of far or just what's on the outline?

[LG2019]

Will test 3 cover material covered in lecture on Monday (11/26)?

[Nicole Elhosni 2I]

On the chem portal, it says "Test 3 covers: End of Bonding from 3.12 (6 Ed.) and from 2D (7 Ed.); and all of Molecular Shape and Structure (see Syllabus and Outlines for details)."

[Josceline 3J]

for test 3 should we go about to study (the book) chapter 4 on molecular structures and shapes or should we focus on studying what the lectures are about? Since the test is supposed to be similar to the homework problems.

[Nicole Elhosni 2I]

I usually focus on the lectures and homework and I read if I am still confused.

[505194972 3k]

for test 3 should we go about to study (the book) chapter 4 on molecular structures and shapes or should we focus on studying what the lectures are about? Since the test is supposed to be similar to the homework problems.

Professor Lavelle often stresses that it is most helpful to do the homework problems to prepare for a test so I would do as many of them as you can and review lecture notes to be sure you understand key concepts.

[Sydney Tay 2B]

I believe we will need to know the basic angles of the more common shapes, like a tetrahedral has angles of 109.5. I don't think he will make use memorize all bond angles when there are lone pairs involved. I just think that we need to know that a lone pair causes greater repulsion and the bond angle of the subsequent atoms will decrease.

Will we also need to know the degrees of the shapes?

[Anjali 4A]

We should revise everything covered on the outline Dr. Lavelle gave, and I find that revising lecture notes and doing as many problems as I can helps the most!

[Meachelle_Lum_1I]

My TA said these would be the topics:
-VSEPR, Molecular Geometry, Lewis Structures
-Intermolecular Forces
-Hybridization
-Polarizability

[ChemSection3I]

are there any specific homework problems we should know for the test?

[Sarah_Kang_2K]

Hi guys.
What do we need to know about Acids and Bases for Test 3?

[Dana Wilks 3I]

Does this mean that the material covered in this past Monday's lecture won't be included?

[Mukil_Pari_2I]

Does this mean that the material covered in this past Monday's lecture won't be included?

No it as stated on Dr. Lavelle's website, the test will only cover 3.12-3.16, 6.4-6.5, and 4.1-4.7 which do not include Monday's lecture.

Hi guys.
What do we need to know about Acids and Bases for Test 3?

Need to know what lewis acids and lewis bases are--lewis acids accept electrons and lewis bases donate electrons.

[Veronica Soliman 4H]

Will we also need to know the degrees of the shapes?

I think it's very likely that we have to know them, but at least we can use simple math to find angles in most of the shapes.

I think it's helpful to know the molecular structure, electron structure, angles, and the way it looks.

[Ashley P 4I]

Does anyone have a trick to memorizing all these things?

[George Ghaly 2L]

the best way of identifying molecular shapes is by memorizing the designated shape according to how many species and lone pairs there are

[Nicolle Fernandez 1E]

Another thing you need to know intramolecular forces like dipole-dipole and ion-ion as well as London dispersion forces

[Angela Grant 1D]

Does anyone have a trick to memorizing all these things?

I made a big chart to study off of, you can find one online if you just search up VSEPR geometries

[Ashley P 4I]

Does anyone have a trick to memorizing all these things?

I made a big chart to study off of, you can find one online if you just search up VSEPR geometries

Thank you so much! I ended up making flash cards as well.

[Ricardo Martin 1J]

A trick I found helpful is memorizing the VSEPR equations such as AX3E2 and knowing what shape corresponds to those equations because as soon as you drew the Lewis Structure you could conclude the VSEPR equation and therefore concluding the shape. This also helps with knowing the hybridization.

[Josceline 3J]

The AXE is the formula for VSEPR, no?? OMG was I reading this all wrong all along???