Search found 51 matches

by Anvi Brahmbhatt 4A
Wed Dec 04, 2019 12:47 pm
Forum: Administrative Questions and Class Announcements
Topic: Final tips
Replies: 19
Views: 174

Re: Final tips

Reading the textbook does help clear up/solidify concepts that we have learned!
by Anvi Brahmbhatt 4A
Wed Dec 04, 2019 12:46 pm
Forum: Administrative Questions and Class Announcements
Topic: Grades
Replies: 15
Views: 165

Re: Grades

Having 250 points allows you to pass with a C-.
by Anvi Brahmbhatt 4A
Wed Dec 04, 2019 12:41 pm
Forum: Administrative Questions and Class Announcements
Topic: Chemistry Community Posts
Replies: 10
Views: 119

Re: Chemistry Community Posts

I think Dr. Lavelle calculates the points for chemistry community. As long as you have done at least 5 posts per week, you should be fine.
by Anvi Brahmbhatt 4A
Wed Dec 04, 2019 12:30 pm
Forum: Student Social/Study Group
Topic: readings
Replies: 13
Views: 199

Re: readings

Reading the textbook is helpful in clearing up some concepts you may not understand.
by Anvi Brahmbhatt 4A
Wed Dec 04, 2019 12:23 pm
Forum: Student Social/Study Group
Topic: Preparing for the final
Replies: 25
Views: 219

Re: Preparing for the final

Definitely go to the review sessions! They really break down and explain concepts, and go over practice problems. Reading the textbook is also super helpful.
by Anvi Brahmbhatt 4A
Wed Nov 27, 2019 10:45 pm
Forum: Conjugate Acids & Bases
Topic: strength of an acid and its conjugate base
Replies: 3
Views: 28

Re: strength of an acid and its conjugate base

Yes. As mentioned above, a strong acid's conjugate base is a weak base, and a weak acid's conjugate base is a strong base.
by Anvi Brahmbhatt 4A
Wed Nov 27, 2019 9:49 pm
Forum: Bronsted Acids & Bases
Topic: Bronsted acid
Replies: 9
Views: 373

Re: Bronsted acid

HBr is a Bronsted acid because it donates an H+ proton.
by Anvi Brahmbhatt 4A
Wed Nov 27, 2019 8:54 pm
Forum: Lewis Acids & Bases
Topic: What is the correct definition of a base?
Replies: 5
Views: 51

Re: What is the correct definition of a base?

Specifically, a Lewis base is defined as a an electron donor.
by Anvi Brahmbhatt 4A
Wed Nov 27, 2019 8:28 pm
Forum: Lewis Acids & Bases
Topic: Difference between Bronsted and Lewis Acid?
Replies: 6
Views: 38

Re: Difference between Bronsted and Lewis Acid?

A Lewis acid is defined as an electron acceptor, while a Bronsted acid is defined as a proton donor.
by Anvi Brahmbhatt 4A
Wed Nov 27, 2019 1:03 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Acids
Replies: 13
Views: 140

Re: Acids

Know the 7 most common acids mentioned above!
by Anvi Brahmbhatt 4A
Thu Nov 21, 2019 5:31 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 6
Views: 47

Re: Bond Angles

The lone pairs on the central atom would cause the expected bond angles to be slightly less because they repel against electrons in the bonding pairs.
by Anvi Brahmbhatt 4A
Thu Nov 21, 2019 4:38 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: XA2E2
Replies: 9
Views: 68

Re: XA2E2

AX2E2 is bent because the lone pairs do affect the positions of the atoms and thus the molecular shape.
by Anvi Brahmbhatt 4A
Thu Nov 21, 2019 3:55 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 2
Replies: 7
Views: 104

Re: Test 2

You can just say "bent" for either!
by Anvi Brahmbhatt 4A
Sat Nov 16, 2019 7:40 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Symmetry and Polarity
Replies: 13
Views: 98

Re: Symmetry and Polarity

Drawing the VSEPR models and determining polarity based off of them will give a more accurate answer than determining off of Lewis structures.
by Anvi Brahmbhatt 4A
Sat Nov 16, 2019 4:44 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bent or Angular
Replies: 13
Views: 130

Re: Bent or Angular

"Bent" and "angular" refer to the same shape, but I would use "angular" as that is what the book refers to it as.
by Anvi Brahmbhatt 4A
Sat Nov 16, 2019 3:45 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: T Shape
Replies: 7
Views: 56

Re: T Shape

It is best to be safe and familiarize yourself with all of the shapes.
by Anvi Brahmbhatt 4A
Sat Nov 16, 2019 3:10 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond Angles
Replies: 9
Views: 67

Re: Bond Angles

The easiest way is to memorize which bond angles go with which shapes. However, do understand the concepts behind why certain bond angles are formed.
by Anvi Brahmbhatt 4A
Sat Nov 16, 2019 2:56 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: All VSEPR structures or just ones from class?
Replies: 11
Views: 83

Re: All VSEPR structures or just ones from class?

Memorize all of the shapes just to be safe! Pay attention to how he determined the shapes of the examples covered in class so you know how to do so.
by Anvi Brahmbhatt 4A
Wed Nov 13, 2019 8:38 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 2
Replies: 15
Views: 177

Re: Test 2

Test 2 will probably cover material after the midterm, including VSEPR, bond dipole moments, and intermolecular interactions.
by Anvi Brahmbhatt 4A
Sat Nov 09, 2019 2:17 am
Forum: Dipole Moments
Topic: Hydrogen Bonds
Replies: 6
Views: 52

Re: Hydrogen Bonds

Hydrogen is bonded to oxygen, nitrogen, or fluorine in hydrogen bonding. These bonds are strong because they are the most electronegative elements in the periodic table.
by Anvi Brahmbhatt 4A
Sat Nov 09, 2019 2:06 am
Forum: Dipole Moments
Topic: Dipole Moments
Replies: 5
Views: 65

Re: Dipole Moments

A difference in electronegativity results in an unequal sharing of electrons between atoms, resulting in a dipole moment.
by Anvi Brahmbhatt 4A
Sat Nov 09, 2019 1:48 am
Forum: Electronegativity
Topic: Trend of Electronegativity
Replies: 22
Views: 140

Re: Trend of Electronegativity

Electronegativity increases to the right and up the periodic table because the effective nuclear charges increase.
by Anvi Brahmbhatt 4A
Sat Nov 09, 2019 1:26 am
Forum: Bond Lengths & Energies
Topic: dissociation energy
Replies: 5
Views: 32

Re: dissociation energy

An increase in bond length (a weaker bond) results in a decrease in dissociation energy.
by Anvi Brahmbhatt 4A
Sat Nov 09, 2019 1:18 am
Forum: Dipole Moments
Topic: Polar
Replies: 9
Views: 91

Re: Polar

A difference in electronegativity between the atoms results in a polar molecule.
by Anvi Brahmbhatt 4A
Thu Oct 31, 2019 3:35 pm
Forum: Octet Exceptions
Topic: Radicals
Replies: 9
Views: 111

Re: Radicals

A radical is a species with an unpaired electron. You can identify radicals by counting the number of valence electrons and getting an odd number, or by drawing the Lewis structure and seeing the unpaired electron.
by Anvi Brahmbhatt 4A
Thu Oct 31, 2019 3:22 pm
Forum: Electronegativity
Topic: Radius
Replies: 13
Views: 557

Re: Radius

The greater the electronegativity, the greater the atom's pull on its electrons is. The radius is thus smaller.
by Anvi Brahmbhatt 4A
Thu Oct 31, 2019 3:17 pm
Forum: Lewis Structures
Topic: Charges on Lewis Structures
Replies: 7
Views: 64

Re: Charges on Lewis Structures

Add the electron when counting how many valence electrons are present in the compound. Add the brackets and the negative sign around the structure after you have drawn it.
by Anvi Brahmbhatt 4A
Thu Oct 31, 2019 3:10 pm
Forum: Ionic & Covalent Bonds
Topic: Valence Electrons?
Replies: 15
Views: 121

Re: Valence Electrons?

bellaha3L wrote:regarding the picture posted, I thought Cl has 7 valence electrons, and the chart says it has 5? I'm pretty sure that chlorine has 7 valence electrons? I could be wrong, unless I'm reading the picture wrong.

I also agree with that; chlorine has 7 valence electrons, but the chart says it has 5.
by Anvi Brahmbhatt 4A
Thu Oct 31, 2019 3:08 pm
Forum: Bond Lengths & Energies
Topic: Single bond vs double bond
Replies: 14
Views: 144

Re: Single bond vs double bond

The numbers describe the length of each bond. Double bonds are shorter than single bonds, and triple bonds are shorter than double bonds.
by Anvi Brahmbhatt 4A
Thu Oct 24, 2019 8:33 pm
Forum: Ionic & Covalent Bonds
Topic: Ionic v.covalent bonds
Replies: 7
Views: 51

Re: Ionic v.covalent bonds

You are correct! Also, in covalent bonds the electrons are shared, while they are not shared in ionic bonds.
by Anvi Brahmbhatt 4A
Thu Oct 24, 2019 3:13 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Atomic Radius
Replies: 18
Views: 137

Re: Atomic Radius

We probably do not need to calculate the atomic radius, but understand the periodic trend explained in the posts above!
by Anvi Brahmbhatt 4A
Thu Oct 24, 2019 3:11 pm
Forum: Trends in The Periodic Table
Topic: Location of elements
Replies: 12
Views: 148

Re: Location of elements

It will definitely be helpful to know as you will be able to recognize elements' properties and how they interact with other elements; memorize them!
by Anvi Brahmbhatt 4A
Thu Oct 24, 2019 2:00 pm
Forum: Trends in The Periodic Table
Topic: bond length
Replies: 9
Views: 85

Re: bond length

He also mentioned in class that the bond lengths of double bonds are shorter than those of single bonds, and that the bond lengths of triple bonds are shorter than those of double bonds.
by Anvi Brahmbhatt 4A
Thu Oct 24, 2019 1:53 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Energy of spdf orbitals
Replies: 11
Views: 114

Re: Energy of spdf orbitals

705198479 wrote:how do I know how many bonds or "dots" go on the ion in the lewis structures

Count the number of valence electrons!
by Anvi Brahmbhatt 4A
Sat Oct 19, 2019 2:12 pm
Forum: Photoelectric Effect
Topic: Speed of Light
Replies: 29
Views: 231

Re: Speed of Light

The speed of light is a constant. I would use the value given on the equation sheet just to be safe.
by Anvi Brahmbhatt 4A
Sat Oct 19, 2019 2:07 pm
Forum: Properties of Electrons
Topic: "Exception" in Writing Electron Configurations
Replies: 4
Views: 42

Re: "Exception" in Writing Electron Configurations

In class today, Dr. Lavelle discussed an "exception" in writing electron configurations... He said "Half full d5 and full d10 subshells have lower energy". So in the example of Cr, the configuration is written as [Ar]3d5 4s1. Can anyone explain this to me? Why does the 4s shell ...
by Anvi Brahmbhatt 4A
Sat Oct 19, 2019 2:02 pm
Forum: Properties of Electrons
Topic: electron mass
Replies: 8
Views: 71

Re: electron mass

It is provided on the formula sheet, but memorize it just in case!
by Anvi Brahmbhatt 4A
Sat Oct 19, 2019 12:28 am
Forum: Properties of Electrons
Topic: Using masses of protons, neutrons, and electrons
Replies: 7
Views: 98

Re: Using masses of protons, neutrons, and electrons

I don't think we need to memorize the values. Many values are already provided on the formula sheet. However, try to know their masses relative to each other.
by Anvi Brahmbhatt 4A
Fri Oct 18, 2019 11:16 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Uncertainty in Speed [ENDORSED]
Replies: 18
Views: 1678

Re: Uncertainty in Speed [ENDORSED]

andrewcj 4I wrote:I think it goes like this:
(p)(x) = (1/2)(h/2)
(p) = m(v)
From here you can plug in (0.01)*(0.05 nm) for x and solve.

Thank you for the explanation!
by Anvi Brahmbhatt 4A
Sat Oct 12, 2019 2:57 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg equation [ENDORSED]
Replies: 73
Views: 2060

Re: Rydberg equation [ENDORSED]

The Rydberg formula is a mathematical formula used to predict the wavelength of light resulting from an electron moving between energy levels of an atom. Rydberg's findings were combined with Bohr's model in which he found 1/λ = RZ2(1/n12 - 1/n22) where: λ is the wavelength of the photon (wavenumbe...
by Anvi Brahmbhatt 4A
Sat Oct 12, 2019 2:55 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test 1 [ENDORSED]
Replies: 107
Views: 3281

Re: Test 1 [ENDORSED]

pauline 1L wrote:Does anyone know where and when our grades for this class will be updated?


Not sure, but I know you can ask your TA and they will let you know your progress in this class!
by Anvi Brahmbhatt 4A
Sat Oct 12, 2019 2:54 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Test 1 [ENDORSED]
Replies: 107
Views: 3281

Re: Test 1 [ENDORSED]

Sean Cheah 3B wrote:
curry 1E wrote:Can someone explain what Angstroms are? I was confused on the test on this question.

Angstroms are a unit of length equivalent to 10^(-10) m.


Yup! Bond lengths are typically measured in Angstroms.
by Anvi Brahmbhatt 4A
Fri Oct 11, 2019 1:15 pm
Forum: Administrative Questions and Class Announcements
Topic: KAREN SUN 5-7PM WORKSHOP - DOWNLAOD WORKSHEETS HERE
Replies: 53
Views: 2678

Re: KAREN SUN 5-7PM WORKSHOP - DOWNLAOD WORKSHEETS HERE

Bita Ghanei 1F wrote:Will you be posting the worksheets and their answer keys weekly?

Thank you so much for making these!

She mentioned that she will be posting the worksheets and their answers on this post weekly.
by Anvi Brahmbhatt 4A
Fri Oct 11, 2019 1:10 pm
Forum: Limiting Reactant Calculations
Topic: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
Replies: 68
Views: 2003

Re: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]

Show as much work as you can when solving the problems on the test in order to receive as much partial credit as you can!
by Anvi Brahmbhatt 4A
Fri Oct 04, 2019 10:39 pm
Forum: Ideal Gases
Topic: Reading the textbook [ENDORSED]
Replies: 134
Views: 79195

Re: Reading the textbook [ENDORSED]

Thank you for giving those links! I'll definitely view them to refresh myself on certain topics. I also do recommend reading the textbook because it does go in depth on the topics it covers, and helps solidify concepts you learn.
by Anvi Brahmbhatt 4A
Fri Oct 04, 2019 10:27 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student [ENDORSED]
Replies: 158
Views: 87997

Re: Advice from a Medical Student [ENDORSED]

Thank you so much for sharing your advice on how to excel in this class! I will definitely keep your tips in mind as I navigate through this course!
by Anvi Brahmbhatt 4A
Fri Oct 04, 2019 1:26 pm
Forum: Student Social/Study Group
Topic: Final Jitters
Replies: 118
Views: 21393

Re: Final Jitters

Definitely start studying a while before the exams, and do as many practice problems as you can! Working out problems really helps solidify concepts and makes you prepared. Do not try cramming the night before; it never helps.
by Anvi Brahmbhatt 4A
Tue Oct 01, 2019 11:02 pm
Forum: Significant Figures
Topic: General Rules to Help with Sig Figs
Replies: 18
Views: 280

Re: General Rules to Help with Sig Figs

Thank you so much for listing out the rules! It is very helpful to refer to, especially when working out problems. I also think for #1: 5293 has 4 significant figures.
by Anvi Brahmbhatt 4A
Mon Sep 30, 2019 9:50 pm
Forum: Administrative Questions and Class Announcements
Topic: Advice from a Medical Student - Part II [ENDORSED]
Replies: 150
Views: 4903

Re: Advice from a Medical Student - Part II [ENDORSED]

Thank you so much for sharing your journey from undergraduate to medical school! Your passion for medicine is very inspiring, and exactly what I need to give me motivation to pursue my own career goals!

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