Search found 95 matches

by Shivani Kapur 2J
Sat Feb 27, 2021 10:50 am
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Gibbs Free Energy Equation and n
Replies: 13
Views: 24

Re: Gibbs Free Energy Equation and n

n is representative of the moles of e-s transferred.
by Shivani Kapur 2J
Sat Feb 27, 2021 10:49 am
Forum: Balancing Redox Reactions
Topic: Determining which molecule is the oxidizing agent
Replies: 49
Views: 97

Re: Determining which molecule is the oxidizing agent

Yes, the oxidizing agent is the substance that is being reduced, and vice versa is true. The reducing agent is the substance being oxidized.
by Shivani Kapur 2J
Sat Feb 27, 2021 10:47 am
Forum: Balancing Redox Reactions
Topic: Adding OH-
Replies: 5
Views: 15

Re: Adding OH-

You should add H20 and OH- to balance reactions in basic solutions. It will usually tell you in the problem if it's acidic or basic.
by Shivani Kapur 2J
Sat Feb 27, 2021 10:44 am
Forum: Balancing Redox Reactions
Topic: Acidic vs. Basic
Replies: 20
Views: 34

Re: Acidic vs. Basic

In acidic solutions, you're supposed to use H+ and H2O to balance the equation while in basic solutions, you have to use OH-and H2O.
by Shivani Kapur 2J
Sun Feb 21, 2021 10:05 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Adiabatic
Replies: 25
Views: 60

Re: Adiabatic

Adiabatic means the q=0 for the system. No heat energy can enter or leave the system.
by Shivani Kapur 2J
Sun Feb 21, 2021 10:04 pm
Forum: Student Social/Study Group
Topic: Classes for next quarter?
Replies: 136
Views: 447

Re: Classes for next quarter?

I'm planning on taking chem 14c and LS 7A!
by Shivani Kapur 2J
Sun Feb 21, 2021 10:01 pm
Forum: Student Social/Study Group
Topic: Points needed to pass?
Replies: 64
Views: 229

Re: Points needed to pass?

According to the syllabus, a 50% or higher is needed to pass the class.
by Shivani Kapur 2J
Sun Feb 21, 2021 10:00 pm
Forum: Student Social/Study Group
Topic: Fave food
Replies: 132
Views: 282

Re: Fave food

Honestly white chocolate covered strawberries are a favorite right now.
by Shivani Kapur 2J
Sun Feb 21, 2021 9:58 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Isolated System
Replies: 8
Views: 22

Re: Isolated System

I'm not sure it is completely possible but I think the best bet would be in a vacuum.
by Shivani Kapur 2J
Sun Feb 21, 2021 9:57 pm
Forum: Student Social/Study Group
Topic: We made it through Midterm 2!
Replies: 64
Views: 197

Re: We made it through Midterm 2!

It feels so good. Honestly thankful fo rthe exam because it will make the review for the final a lot easier.
by Shivani Kapur 2J
Sun Feb 21, 2021 9:55 pm
Forum: General Science Questions
Topic: Chem Jokes
Replies: 22
Views: 100

Re: Chem Jokes

I don't trust atoms, I heard they make everything up.
by Shivani Kapur 2J
Sun Feb 21, 2021 9:53 pm
Forum: Administrative Questions and Class Announcements
Topic: Can We Review our Exams?
Replies: 69
Views: 247

I believe you can if you ask your TA!
by Shivani Kapur 2J
Sun Feb 21, 2021 9:52 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8791
Views: 1493025

Re: Post All Chemistry Jokes Here

I would but all the good ones Argon.
by Shivani Kapur 2J
Sat Feb 13, 2021 1:35 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Kelvin conversion
Replies: 40
Views: 91

Re: Kelvin conversion

Add either 273.15 or 273 to your degrees celsius to convert to Kelvin.
by Shivani Kapur 2J
Sat Feb 13, 2021 1:34 pm
Forum: Student Social/Study Group
Topic: Thoughts on Upcoming Midterm 2
Replies: 41
Views: 225

Re: Thoughts on Upcoming Midterm 2

Honestly, I'm feeling a little uneasy about this midterm because the content is more difficult compared to what we have done in the past. However, I'm sure that if you're putting in the time and effort to review the notes and do the textbook problems that you will do just fine!
by Shivani Kapur 2J
Sat Feb 13, 2021 1:32 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Difference between ΔS° and ΔS
Replies: 9
Views: 42

Re: Difference between ΔS° and ΔS

The one with the degree symbol indicates that it is the entropy value at equilibrium. Hope this helps!
by Shivani Kapur 2J
Sat Feb 13, 2021 1:31 pm
Forum: Ideal Gases
Topic: Units for K
Replies: 29
Views: 105

Re: Units for K

Since K is a ratio where all units cancel out, there are none.
by Shivani Kapur 2J
Sat Feb 13, 2021 1:31 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Is it necessary to memorize Cp,m or Cv,m values? [ENDORSED]
Replies: 26
Views: 110

Re: Is it necessary to memorize Cp,m or Cv,m values? [ENDORSED]

These values are given to us on the equation sheet we can use on the test so I don't think you need to memorize them although it never hurts to!
by Shivani Kapur 2J
Sun Feb 07, 2021 7:27 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Combustion = Exothermic
Replies: 23
Views: 83

Re: Combustion = Exothermic

The energy that is released from forming the bonds in the products is greater than the energy used to break the bonds in the reactants.
by Shivani Kapur 2J
Sun Feb 07, 2021 7:26 pm
Forum: Student Social/Study Group
Topic: Superbowl
Replies: 10
Views: 66

Re: Superbowl

Definitely thought that Buccs were gonna win anyway. Wish the game could have been closer tho.
by Shivani Kapur 2J
Sun Feb 07, 2021 7:25 pm
Forum: Administrative Questions and Class Announcements
Topic: Can We Review our Exams?
Replies: 69
Views: 247

Re: Can We Review our Exams?

I think you can ask your TA and they can help you go over it one on one.
by Shivani Kapur 2J
Sun Feb 07, 2021 7:20 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2
Replies: 31
Views: 144

Re: Midterm 2

I don't believe we know how far we are going to get to by midterm 2 so far.
by Shivani Kapur 2J
Sun Feb 07, 2021 7:18 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Heat in isothermal expansion
Replies: 5
Views: 19

Re: Heat in isothermal expansion

An example of where when heat is being added, it is actually being used to break the bonds and used as energy instead of an addition to the temperature.
by Shivani Kapur 2J
Sun Jan 31, 2021 2:41 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: is HClO3 weak or strong? [ENDORSED]
Replies: 49
Views: 251

Re: is HClO3 weak or strong? [ENDORSED]

I believe that HClO3 is a strong acid. Hope this helps!
by Shivani Kapur 2J
Sun Jan 31, 2021 2:40 pm
Forum: Phase Changes & Related Calculations
Topic: when to assume x is insignificant
Replies: 83
Views: 193

Re: when to assume x is insignificant

Dr. Lavelle said to check and see if the ionization percentages are less than 5% but also if the K is less than 10^-3, then you can approximate.
by Shivani Kapur 2J
Sun Jan 31, 2021 2:35 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Neutralization
Replies: 25
Views: 105

Re: Neutralization

A base and acid form a salt and water as the products, which results in a neutral pH of usually 7.
by Shivani Kapur 2J
Sun Jan 31, 2021 2:32 pm
Forum: Student Social/Study Group
Topic: Worried About MT 1 Grades
Replies: 39
Views: 254

Re: Worried About MT 1 Grades

I definitely agree with where you're coming from. Midterm 1 last quarter was definitely easier than midterm 1 this quarter. Doing the textbook problems really helps so I recommend heavily studying those for the upcoming midterms :)
by Shivani Kapur 2J
Sun Jan 31, 2021 2:27 pm
Forum: Administrative Questions and Class Announcements
Topic: midterm
Replies: 16
Views: 90

Re: midterm

From my experience in 14A, Dr. Lavelle typically releases the scores about one week after the exam. However, we all took it on the same day this quarter so it may be a little different.
by Shivani Kapur 2J
Sat Jan 23, 2021 11:21 pm
Forum: Administrative Questions and Class Announcements
Topic: Calculator for exams
Replies: 28
Views: 93

Re: Calculator for exams

I've been using the TI-84 Plus CE claculator and it's been okay to use so far. I honestly think any calculator along those lines should work.
by Shivani Kapur 2J
Sat Jan 23, 2021 11:18 pm
Forum: General Science Questions
Topic: Chem Jokes
Replies: 22
Views: 100

Re: Chem Jokes

I would add the go-to classic chemistry joke in here, but all the good ones Argon.
by Shivani Kapur 2J
Sat Jan 23, 2021 11:17 pm
Forum: Phase Changes & Related Calculations
Topic: Bond Enthalpies
Replies: 4
Views: 16

Re: Bond Enthalpies

The most accurate method for bond enthalpies is probably Hess's Method and using the summation equation of the standard enthalpies of formation.
by Shivani Kapur 2J
Sat Jan 23, 2021 11:14 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Acids and Bases
Replies: 8
Views: 59

Re: Acids and Bases

Acids and bases act in a certain strict way. It's just a matter of how you look at them. Whether it's through receiving a proton of donating an electron, it is essentially one and the same.
by Shivani Kapur 2J
Sat Jan 23, 2021 11:12 pm
Forum: Administrative Questions and Class Announcements
Topic: Sapling vs. Textbook Problems
Replies: 8
Views: 44

Re: Sapling vs. Textbook Problems

While I think that sapling is also a great learning method, the tests lay more along the lines of the textbook problems based on my experience last quarter.
by Shivani Kapur 2J
Sun Jan 17, 2021 2:53 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: q vs k
Replies: 62
Views: 222

Re: q vs k

When Q = K, the reaction is at equilibrium. K will only change with a temperature change, but Q will change depending on factors such as changes in concentration and pressure.
by Shivani Kapur 2J
Sun Jan 17, 2021 2:49 pm
Forum: Student Social/Study Group
Topic: Motivation
Replies: 34
Views: 182

Re: Motivation

Keeping a planner and reminding myself that I do not always need to be doing something for school helped me become more motivated and use the time that I do dedicate towards school be more efficient.
by Shivani Kapur 2J
Sun Jan 17, 2021 2:46 pm
Forum: Ideal Gases
Topic: Does temperature matter?
Replies: 19
Views: 69

Re: Does temperature matter?

Temperature matters as it plays a key role in the ideal gas equation, PV=nRT.
by Shivani Kapur 2J
Sun Jan 17, 2021 2:44 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kc and Kp
Replies: 11
Views: 54

Re: Kc and Kp

You can manipulate the ideal gas equation to convert the equation into terms of either molarity or concentration. It just depends which one you use.
by Shivani Kapur 2J
Sun Jan 17, 2021 2:42 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Heating an Exothermic Reaction
Replies: 7
Views: 40

Re: Heating an Exothermic Reaction

By adding heat to the products, the reaction shifts towards the left to restore equilibrium.
by Shivani Kapur 2J
Sun Jan 10, 2021 8:22 pm
Forum: Ideal Gases
Topic: Kc vs Kp
Replies: 109
Views: 999

Re: Kc vs Kp

Kp should be used when dealing with gases. Hope this helps!
by Shivani Kapur 2J
Sun Jan 10, 2021 8:21 pm
Forum: Student Social/Study Group
Topic: Group Me
Replies: 6
Views: 44

Re: Group Me

Hi Lucy! This is the link for the class GroupMe. https://groupme.com/join_group/62288203/dSSkobMS
by Shivani Kapur 2J
Sun Jan 10, 2021 8:20 pm
Forum: Ideal Gases
Topic: Units for Pressure
Replies: 41
Views: 848

Re: Units for Pressure

I believe we will mostly be using atm for the extent of this class.
by Shivani Kapur 2J
Sun Jan 10, 2021 8:18 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: aqueous solutions
Replies: 9
Views: 49

Re: aqueous solutions

The aqueous solutions must be included.
by Shivani Kapur 2J
Sun Jan 10, 2021 8:17 pm
Forum: Administrative Questions and Class Announcements
Topic: Chemistry Posts in 14B
Replies: 156
Views: 2357

Re: Chemistry Posts in 14B

Yes, we just add on to our 50 posts from last quarter for a grand total of 100 posts by the end of this quarter.
by Shivani Kapur 2J
Fri Dec 11, 2020 12:35 pm
Forum: Amphoteric Compounds
Topic: Sapling Week 10 HW Question 2
Replies: 8
Views: 68

Re: Sapling Week 10 HW Question 2

An amphoteric substance has the liberty to either gain a proton or lose a proton. Usually, compounds with multiple Hydrogens can act as amphoteric substances.
by Shivani Kapur 2J
Fri Dec 11, 2020 12:32 pm
Forum: Quantum Numbers and The H-Atom
Topic: Why does nickel have an expanded octet?
Replies: 3
Views: 32

Re: Why does nickel have an expanded octet?

Since Nickel is in the d-orbital, it is able to access its expanded octet!
by Shivani Kapur 2J
Fri Dec 11, 2020 12:31 pm
Forum: Student Social/Study Group
Topic: Post All Chemistry Jokes Here
Replies: 8791
Views: 1493025

Re: Post All Chemistry Jokes Here

I would post all my good chemistry jokes but all of them Argon.
by Shivani Kapur 2J
Fri Dec 11, 2020 12:30 pm
Forum: Amphoteric Compounds
Topic: Amphoteric
Replies: 8
Views: 93

Re: Amphoteric

I'm pretty sure this isn't going to be on the final but it exhibits either acid characteristics or base characteristics depending on what it is being added to.
by Shivani Kapur 2J
Fri Dec 11, 2020 12:28 pm
Forum: Properties of Electrons
Topic: How can an electron be excited?
Replies: 4
Views: 38

Re: How can an electron be excited?

As long as the energy from the photon is greater than the energy of the work function, electrons will eject using kinetic energy. These electrons move to higher energy states, gaining energy which makes them excited.
by Shivani Kapur 2J
Sun Dec 06, 2020 1:20 pm
Forum: Naming
Topic: Sapling Week 9 #5
Replies: 3
Views: 38

Re: Sapling Week 9 #5

I think we are expected to know them. I would just memorize them just to be safe. Knowing them can never hurt anyway.
by Shivani Kapur 2J
Sun Dec 06, 2020 1:19 pm
Forum: Student Social/Study Group
Topic: Tips for Staying Focused
Replies: 52
Views: 600

Re: Tips for Staying Focused

To be most efficient in my studying, I usually put on some music (not super intense) and let it play while I study. Sometimes an hour of studying will go by and I won't even notice. Also, I'd recommend to not study on your bed.
by Shivani Kapur 2J
Sun Dec 06, 2020 1:17 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Flashcards
Replies: 8
Views: 67

Re: Flashcards

To be honest, I think it just depends on what kind of a learner you are. For me personally, doing applicational problems with the content I'm trying to memorize helps things stick more but if flash cards have worked for you in the past, then that's a really good way to memorize.
by Shivani Kapur 2J
Sat Nov 28, 2020 2:00 pm
Forum: Administrative Questions and Class Announcements
Topic: Class Grading Scale
Replies: 7
Views: 129

Re: Class Grading Scale

I have this question too. Does anyone know how the class has been curved in previous years.
by Shivani Kapur 2J
Sat Nov 28, 2020 1:59 pm
Forum: Administrative Questions and Class Announcements
Topic: fall 2020 final
Replies: 17
Views: 210

Re: fall 2020 final

The final is held on the weekend. It isn't during class time or discussion section.
by Shivani Kapur 2J
Sat Nov 28, 2020 1:59 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Sapling Wk8 Q. 18, Determining Molecular Shape
Replies: 10
Views: 91

Re: Sapling Wk8 Q. 18, Determining Molecular Shape

Yes, molecules are read from left to right.
by Shivani Kapur 2J
Sat Nov 28, 2020 1:58 pm
Forum: Administrative Questions and Class Announcements
Topic: 14B
Replies: 11
Views: 161

Re: 14B

We will have tests during class time for Chem 14B so I don't recommend scheduling another class at the same time.
by Shivani Kapur 2J
Sat Nov 28, 2020 1:56 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polar vs. nonpolar bonds/molecules
Replies: 8
Views: 81

Re: Polar vs. nonpolar bonds/molecules

Drawing the molecule out really helps visualize if it's nonpolar or polar. Since the arrows both point outward from the Carbon to the Oxygens, the dipole moments cancel out and therefore the molecule in nonpolar.
by Shivani Kapur 2J
Sat Nov 28, 2020 1:54 pm
Forum: Hybridization
Topic: Sapling #12
Replies: 27
Views: 222

Re: Sapling #12

The hybridization is the electron density around the atom. Double and triple bonds also just count as a single region of electron density.
by Shivani Kapur 2J
Sat Nov 28, 2020 1:53 pm
Forum: Student Social/Study Group
Topic: Exercising Our Minds and Bodies
Replies: 120
Views: 620

Re: Exercising Our Minds and Bodies

I try to run for a little everyday but sometimes it's just hard to find motivation. It definitely helps me mentally to exercise though.
by Shivani Kapur 2J
Sat Nov 28, 2020 1:51 pm
Forum: Student Social/Study Group
Topic: Midterm Exam Questions
Replies: 16
Views: 169

Re: Midterm Exam Questions

Just to be safe, I wouldn't speak upon it on here but you can go over them with your TA!
by Shivani Kapur 2J
Sat Nov 28, 2020 1:50 pm
Forum: Lewis Structures
Topic: lewis structure resonance
Replies: 5
Views: 37

Re: lewis structure resonance

They aren't incorrect; however better formal charges are always preferred and more ideal.
by Shivani Kapur 2J
Sat Nov 28, 2020 1:48 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Double/Triple Bonds and Polarity
Replies: 8
Views: 61

Re: Double/Triple Bonds and Polarity

The molecule is an overall nonpolar molecule since the dipoles do cancel our regardless of bond length.
by Shivani Kapur 2J
Sat Nov 28, 2020 1:46 pm
Forum: Administrative Questions and Class Announcements
Topic: Final
Replies: 15
Views: 154

Re: Final

I would think that we are going to use respondus and while the final won't be in our discussion sections, we're probably still going to be monitored somehow.
by Shivani Kapur 2J
Sat Nov 28, 2020 1:45 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polarity and Shape
Replies: 13
Views: 96

Re: Polarity and Shape

You can draw out the molecule and if it has dipoles that do not cancel, it is polar. You can also have a nonpolar molecule with polar bonds.
by Shivani Kapur 2J
Sun Nov 15, 2020 9:39 pm
Forum: Administrative Questions and Class Announcements
Topic: Missed chem community posts
Replies: 12
Views: 118

Re: Missed chem community posts

I had this exact same question. I tried emailing my TA about it a few times but I didn't hear back so thank you so much for clarifying. It was stressing me out.
by Shivani Kapur 2J
Sun Nov 15, 2020 9:38 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Oxidation Sapling 9
Replies: 6
Views: 108

Re: Oxidation Sapling 9

Since there are 4 Oxygens, each with a charge of -2, the total charge from Oxygens is -8. Since the overall charge on ClO4- is -1. The charge on Cl must be +7, and that is the oxidation number on Cl.
by Shivani Kapur 2J
Sun Nov 15, 2020 9:35 pm
Forum: General Science Questions
Topic: Midterm 2
Replies: 12
Views: 97

Re: Midterm 2

I believe it will contain material from the last 8 points on Outline 2 and all of Outline 3.
by Shivani Kapur 2J
Sun Nov 15, 2020 9:33 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Sapling # 20
Replies: 6
Views: 76

Re: Sapling # 20

All molecules and compounds see London Dispersion forces. Dipole-dipole forces are shown as CH3CHO is a polar compound. Therefore, the differences in electronegativity lead to an unequal sharing of electrons and the presence of dipole - dipole forces.
by Shivani Kapur 2J
Sun Nov 15, 2020 9:29 pm
Forum: Electronegativity
Topic: Electronegativity
Replies: 9
Views: 85

Re: Electronegativity

Electronegativity decreases down a group as more shells get added. The addition of these valence shells results in the electrons being further away from the nucleus and therefore they see a smaller attraction to it.
by Shivani Kapur 2J
Sun Nov 15, 2020 9:19 pm
Forum: Ionic & Covalent Bonds
Topic: midterm 2: knowing compounds
Replies: 14
Views: 82

Re: midterm 2: knowing compounds

I think they will be provided. I don't think we are expected to know compounds that extensively right now.
by Shivani Kapur 2J
Sun Nov 15, 2020 9:18 pm
Forum: Ionic & Covalent Bonds
Topic: Sapling week 5 & 6 #16
Replies: 7
Views: 44

Re: Sapling week 5 & 6 #16

The Hydrogen must be able to create a strong dipole moment to bond to an electronegative element therefore bonding to another electronegative element will allow for the electrons to be shared unequally and allow for Hydrogen bonding to occur.
by Shivani Kapur 2J
Sun Nov 15, 2020 9:15 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Oxidation numbers
Replies: 3
Views: 17

Re: Oxidation numbers

I don't think we need to know them in a lot of depth. However, there was a sapling problem on it so I would recommend reviewing how to do them but I don't think we will need to know how to do them extensively.
by Shivani Kapur 2J
Sun Nov 15, 2020 9:14 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: S and P electrons
Replies: 14
Views: 116

Re: S and P electrons

Because the p-orbitals are further away from the nucleus, it takes more energy to keep the electron while the s-orbitals are closer to the nucleus and see a stronger attraction to it therefore less energy is needed.
by Shivani Kapur 2J
Sun Nov 15, 2020 9:13 pm
Forum: Lewis Structures
Topic: Expanded Octets
Replies: 7
Views: 25

Re: Expanded Octets

Atoms in n=3 or higher have d-orbitals in valence shells that can accommodate additional e-s. For example, phosphorus can accommodate 10 e-s using 1 d-orbital.
by Shivani Kapur 2J
Sun Nov 15, 2020 9:10 pm
Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
Topic: Van der Waals vs London Dispersion
Replies: 10
Views: 40

Re: Van der Waals vs London Dispersion

London dispersion is just another name for Van Der Waals. They are interchangeable. I don't think their distinction is important to know for the upcoming midterm.
by Shivani Kapur 2J
Sun Nov 15, 2020 9:09 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Sapling #20
Replies: 12
Views: 97

Re: Sapling #20

The hydrogen must be bonded to an electronegative atom so it can create a dipole moment strong enough to create a Hydrogen bond. Electronegative elements that can Hydrogen bond include F, O, and N.
by Shivani Kapur 2J
Sun Nov 15, 2020 9:06 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Sapling #9 week 5/6
Replies: 13
Views: 102

Re: Sapling #9 week 5/6

The formal charge that is closest to zero is most stable therefore the structure with low formal charges closest to zero are preferred.
by Shivani Kapur 2J
Sun Nov 15, 2020 9:05 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Sapling W6 #9
Replies: 2
Views: 21

Re: Sapling W6 #9

The overall charge is -1. Since there are 4 Oxygens, each with a charge of -2. The charge on Cl must be +7 since (oxidation number on Cl) + (-2)4 = -1.
by Shivani Kapur 2J
Sun Nov 15, 2020 5:26 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Sapling week 5 & 6 #5
Replies: 20
Views: 128

Re: Sapling week 5 & 6 #5

The formal charge on Carbon should be -2. Since Crabon has 4 valence electrons, 2 pairs of shared electrons, and 2 lone pairs of electrons. 4-(2+4) = -2. Hope this helps!
by Shivani Kapur 2J
Sun Nov 15, 2020 5:24 pm
Forum: Dipole Moments
Topic: Sapling #19
Replies: 12
Views: 92

Re: Sapling #19

It should say SO2 instead. Dr. Lavelle addressed this issue.
by Shivani Kapur 2J
Sun Nov 15, 2020 5:21 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Drawing the lone pairs on the central atom
Replies: 5
Views: 46

Re: Drawing the lone pairs on the central atom

The presence of the lone pairs most definitely contributes to the shape of the molecule but I believe we aren't getting into bond angles and shapes for the purposes of Midterm 2. I believe we are after though!
by Shivani Kapur 2J
Sun Nov 15, 2020 5:18 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Which has more ionic character?
Replies: 11
Views: 102

Re: Which has more ionic character?

As ionic radius increases, the electrons show less attraction for the nucleus and thus the atom is more readily polarizable leading to a decrease in ionic character.
by Shivani Kapur 2J
Sun Nov 15, 2020 5:16 pm
Forum: General Science Questions
Topic: Midterm #2
Replies: 11
Views: 84

Re: Midterm #2

I believe everything from where we ended off for on outline 2 up to Wednesday's lecture will be included on the midterm.
by Shivani Kapur 2J
Sun Nov 15, 2020 5:15 pm
Forum: Resonance Structures
Topic: bond length
Replies: 37
Views: 194

Re: bond length

We don't need to know how to calculate them but we do need to know which bond lengths are stronger and shorter compared to which bond lengths are longer and weaker.
by Shivani Kapur 2J
Sun Nov 15, 2020 5:13 pm
Forum: Lewis Structures
Topic: Central Atom
Replies: 20
Views: 93

Re: Central Atom

The least electronegative atom goes in the center so for example Carbon would go in the center instead of Oxygen.
by Shivani Kapur 2J
Sun Nov 15, 2020 5:12 pm
Forum: Properties of Light
Topic: Videos
Replies: 12
Views: 138

Re: Videos

The Organic Chemistry Tutor is really good! I would also recommend taking the module assessments and watching Professor Lavelle's modules on topics you need clarification on.
by Shivani Kapur 2J
Sun Nov 15, 2020 5:10 pm
Forum: Lewis Acids & Bases
Topic: Sapling HW #6
Replies: 4
Views: 44

Re: Sapling HW #6

As a visual learner, I found it easier to draw out the molecules or ions and see whether they needed electrons to form an octet or were at liberty to donate them, and then just classified them from there.
by Shivani Kapur 2J
Sun Nov 15, 2020 5:09 pm
Forum: Electronegativity
Topic: Sapling Question 13
Replies: 7
Views: 36

Re: Sapling Question 13

I was initially confused on this question as well. You have to find every possible element that has the potential to hydrogen bond so that would be H, F, N and O. Since Oxygen has 2 lone pairs, it has the potential to form two Hydrogen bonds and in total there are 8 opportunities.
by Shivani Kapur 2J
Sun Nov 15, 2020 5:06 pm
Forum: Ionic & Covalent Bonds
Topic: Homework due date
Replies: 49
Views: 388

Re: Homework due date

The homework is due on Sunday by midnight. I submitted it on the day of (Sunday) so it definitely wasn't due on Saturday!
by Shivani Kapur 2J
Sun Nov 15, 2020 5:04 pm
Forum: Lewis Structures
Topic: Sapling hw 3
Replies: 11
Views: 109

Re: Sapling hw 3

Nitrogen isn't allowed to have an expanded octet because it is in period 2 and doesn't have access to a d-orbital. Hope this helps!
by Shivani Kapur 2J
Sun Nov 15, 2020 5:02 pm
Forum: Lewis Structures
Topic: Lewis acids and Bases
Replies: 20
Views: 123

Re: Lewis acids and Bases

After drawing out the lewis pair structure, see if the molecule or compound has a lone pair that it can give or if it needs a lone pair to become an octet. For example, the electrons in NH3 can give its electron pair to BF3, which is electron deficient therefore NH3 is the lewis base and BF3 is the ...
by Shivani Kapur 2J
Sun Nov 15, 2020 1:50 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Sapling Homework #5
Replies: 2
Views: 33

Sapling Homework #5

I accidentally erased the molecular structure A that came with the problem in which we had to identify the formal charge of the elements. If anyone could please send a picture of what the initial structure looked like, I can redraw the structure that I accidentally erased and complete the problem. T...
by Shivani Kapur 2J
Sun Nov 15, 2020 1:45 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: sapling number 4
Replies: 3
Views: 23

Re: sapling number 4

Structures with the closest formal charges to zero are favored. Elements with a formal charge of 0 are more stable therefore they are more favored.
by Shivani Kapur 2J
Sun Nov 15, 2020 1:45 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: sapling number 4
Replies: 3
Views: 23

Re: sapling number 4

Structures with the closest formal charges to zero are favored. Elements with a formal charge of 0 are more stable therefore they are more favored.
by Shivani Kapur 2J
Sun Nov 15, 2020 1:22 pm
Forum: Lewis Structures
Topic: Sapling HW Q4
Replies: 9
Views: 104

Re: Sapling HW Q4

Do ample and overwhelming mean the same thing? Someone said to not worry about the wording but the question is giving us the option to choose multiple answers so I am a little confused.
by Shivani Kapur 2J
Sun Nov 15, 2020 1:13 pm
Forum: Lewis Structures
Topic: Sapling HW Q4
Replies: 9
Views: 104

Re: Sapling HW Q4

Do ample and overwhelming mean the same thing? Someone said to not worry about the wording but the question is giving us the option to choose multiple answers so I am a little confused.

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