Search found 52 matches

by philipraj_1F
Sun Dec 08, 2019 6:22 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: pKa and Ka
Replies: 9
Views: 195

Re: pKa and Ka

When pKa increases, Ka decreases. They are used for weak acids mostly
by philipraj_1F
Sun Dec 08, 2019 6:22 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Formal Charge
Replies: 11
Views: 305

Re: Formal Charge

It does not matter that it is a electron, it will be 1-
by philipraj_1F
Sun Dec 08, 2019 6:21 pm
Forum: Lewis Acids & Bases
Topic: Strong Acid
Replies: 2
Views: 131

Re: Strong Acid

It has to do with the formal charges.
by philipraj_1F
Sun Dec 08, 2019 6:20 pm
Forum: Amphoteric Compounds
Topic: Amphoteric vs Amphiprotic
Replies: 11
Views: 409

Re: Amphoteric vs Amphiprotic

Amphiprotic is a special type of amphoteric
by philipraj_1F
Sun Dec 08, 2019 6:20 pm
Forum: Coordinate Covalent Bonds
Topic: Myoglobin
Replies: 6
Views: 559

Re: Myoglobin

Myoglobin can bond to one O2 molecule.
by philipraj_1F
Sat Nov 30, 2019 1:29 pm
Forum: Hybridization
Topic: Drawing Hybridization Orbitals
Replies: 3
Views: 37

Re: Drawing Hybridization Orbitals

I do not think we would need to draw hybridization orbitals because we were never thought how to do that, but I think we should know conceptually how they would look and function.
by philipraj_1F
Sat Nov 30, 2019 1:27 pm
Forum: Bronsted Acids & Bases
Topic: Net Ionic Equations
Replies: 5
Views: 70

Re: Net Ionic Equations

If it can dissolve into ions, you must represent it as ions (so covalent molecules stay how they are) and it is net it must be simplified to show only the ions that change in a reaction.
by philipraj_1F
Sat Nov 30, 2019 1:24 pm
Forum: Bronsted Acids & Bases
Topic: Bronsted vs. Lewis
Replies: 5
Views: 67

Re: Bronsted vs. Lewis

Also bronsted acid and bases are a type of Lewis acid and bases.
by philipraj_1F
Sat Nov 30, 2019 1:22 pm
Forum: Bronsted Acids & Bases
Topic: Water as Acid or Base
Replies: 2
Views: 34

Re: Water as Acid or Base

It can be either so it would depend on what the product and other reactant are meaning how it changes.
by philipraj_1F
Sat Nov 30, 2019 1:15 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Relative Acidity
Replies: 4
Views: 76

Re: Relative Acidity

It is more stable when it is less likely to attract a proton and stop being a conjugate base.
by philipraj_1F
Wed Nov 20, 2019 9:12 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Polarity Diatomic Molecules
Replies: 1
Views: 48

Polarity Diatomic Molecules

What are common diatomic molecules with different elements that are not considered polar?
by philipraj_1F
Tue Nov 19, 2019 8:28 pm
Forum: Dipole Moments
Topic: Dipole Moment
Replies: 10
Views: 266

Dipole Moment

What difference in electronegativity values is needed for a dipole moment and how do you calculate this difference if we are not given an electronegativity chart?
by philipraj_1F
Tue Nov 19, 2019 8:14 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: Dipole-Dipole
Replies: 5
Views: 109

Dipole-Dipole

If two dipole moments cancel out in a molecule due to structure does it still have dipole-dipole bonding? Also, if they cancel would the molecule still be considered polar?
by philipraj_1F
Tue Nov 19, 2019 4:07 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: London Dispersion Forces
Replies: 1
Views: 20

London Dispersion Forces

Do London Dispersion forces increase from right to left across a periodic table because of less effective nuclear charge causing the atoms to be bigger?
by philipraj_1F
Tue Nov 19, 2019 2:58 pm
Forum: Dipole Moments
Topic: Dipole moment
Replies: 1
Views: 40

Dipole moment

How are you supposed to know the difference in electronegativity values in a molecule to tell that there is a dipole moment? And also, if a two atoms typically do not have a dipole moment but the arrangement is asymmetrical, does that cause a dipole moment and for them to be polar?
by philipraj_1F
Mon Nov 18, 2019 8:07 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 2
Replies: 7
Views: 96

Re: Test 2

I doubt it would matter but I would go with bent
by philipraj_1F
Mon Nov 18, 2019 8:03 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Class Curve?
Replies: 4
Views: 100

Re: Class Curve?

It varies quarter to quarter based overall on how the classes perform.
by philipraj_1F
Mon Nov 18, 2019 8:01 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: dipole dipole
Replies: 5
Views: 57

Re: dipole dipole

A smaller molecule has stronger dipole dipole forces
by philipraj_1F
Mon Nov 18, 2019 7:59 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Question About Linear Molecules
Replies: 2
Views: 39

Re: Question About Linear Molecules

It is because the equatorial lone pairs cancel each other out.
by philipraj_1F
Mon Nov 18, 2019 7:58 pm
Forum: Lewis Structures
Topic: radicals
Replies: 3
Views: 66

Re: radicals

Radicals have an odd number of electrons, and the more electronegative atom will not have the unpaired electron
by philipraj_1F
Sun Nov 10, 2019 5:10 pm
Forum: Octet Exceptions
Topic: Antioxidants
Replies: 9
Views: 296

Re: Antioxidants

Antioxidants give an electron to radicals which keeps them from being harmful in the body
by philipraj_1F
Sun Nov 10, 2019 5:07 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Energy Levels
Replies: 4
Views: 155

Re: Energy Levels

You would have to use the Rydberg equation to solve that
by philipraj_1F
Sun Nov 10, 2019 5:03 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Remembering bond angles
Replies: 1
Views: 57

Re: Remembering bond angles

You kind of do need to just memorize bond angles, but it does make sense conceptually because the angles do obviously relate to the shape
by philipraj_1F
Sun Nov 10, 2019 5:01 pm
Forum: Octet Exceptions
Topic: Incomplete octets
Replies: 3
Views: 133

Re: Incomplete octets

There are specific atoms that can have in incomplete octet, and you would know if the formal charge is lowest when it has an incomplete octet
by philipraj_1F
Sun Nov 10, 2019 5:00 pm
Forum: Empirical & Molecular Formulas
Topic: Empirical formula
Replies: 2
Views: 140

Re: Empirical formula

Like what was said above, the specific mass you are given does not matter as long as the ratio is correct and you convert it to moles.
by philipraj_1F
Tue Nov 05, 2019 5:33 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Schrodingers eq [ENDORSED]
Replies: 1
Views: 142

Schrodingers eq [ENDORSED]

What do we need to know about schrodingers equation and its relation to wave functions and orbitals?
by philipraj_1F
Sun Nov 03, 2019 11:42 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Order of removing electrons
Replies: 4
Views: 64

Re: Order of removing electrons

The s orbitals are considered to be less stable for an electron than d orbitals once one electron is added to a d orbital. That is why you remove electrons from a s orbital before d orbitals.
by philipraj_1F
Sun Nov 03, 2019 11:39 am
Forum: Coordinate Covalent Bonds
Topic: Single, double, and triple bonds
Replies: 6
Views: 82

Re: Single, double, and triple bonds

No, it does also depend on the size of the elements themselves.
by philipraj_1F
Sun Nov 03, 2019 11:37 am
Forum: Properties of Light
Topic: n in Rydberg Equation
Replies: 1
Views: 45

Re: n in Rydberg Equation

n1 is the initial energy level and n2 is the final energy level that the electron moves to. It is used to find the wavelength of light that results from an electron moving between energy levels.
by philipraj_1F
Sun Nov 03, 2019 11:35 am
Forum: Bond Lengths & Energies
Topic: Strength of Bonds
Replies: 16
Views: 221

Re: Strength of Bonds

Longer bonds are less stronger than shorter bonds.
by philipraj_1F
Sun Nov 03, 2019 11:34 am
Forum: Dipole Moments
Topic: Dipole Moment Clarification
Replies: 2
Views: 27

Re: Dipole Moment Clarification

A dipole moment is when there is a separation of positive and negative charges between atoms in a molecule, and is a measure of net molecular polarity. It can be seen with Oxygen, where the oxygen atom is more electronegative than the hydrogens and slightly negatively charged, while the hydrogen ato...
by philipraj_1F
Sun Oct 27, 2019 12:46 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Stability
Replies: 9
Views: 198

Re: Stability

Higher uneven distribution of charges in a molecule will cause it to be less stable. When the formal charge is closest to zero, that is when it is most stable.
by philipraj_1F
Sun Oct 27, 2019 12:42 pm
Forum: Trends in The Periodic Table
Topic: Ionization Energy
Replies: 9
Views: 91

Re: Ionization Energy

It is because you always need energy to remove an electron
by philipraj_1F
Sun Oct 27, 2019 12:41 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Assigning Orbitals to Elements
Replies: 4
Views: 69

Re: Assigning Orbitals to Elements

I think it is not important to know which specific orbital it is, but that the electron distribution among orbitals is correct.
by philipraj_1F
Sun Oct 27, 2019 12:39 pm
Forum: Trends in The Periodic Table
Topic: Electron Affinity
Replies: 6
Views: 101

Re: Electron Affinity

When its negative energy is released when an electron is added and when its positive energy is gained when an electron is added
by philipraj_1F
Sun Oct 27, 2019 12:33 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: HW 1E.7
Replies: 1
Views: 34

Re: HW 1E.7

For a, the orbitals should fill with parallel electrons in separate orbitals first rather than a pair because that is in a lower energy state. For b, the spin of the electrons in each orbital should all face the same way as that is also a lower energy state.
by philipraj_1F
Sun Oct 20, 2019 2:24 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Aufbau Principle
Replies: 3
Views: 38

Re: Aufbau Principle

You also need to know that there are exceptions to it with the 4s and 3d orbitals when the s orbitals lose an electron to the d orbitals.
by philipraj_1F
Sun Oct 20, 2019 2:12 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Pauli Exclusion Principle
Replies: 9
Views: 533

Re: Pauli Exclusion Principle

All it is that you can only have a maximum of two electrons per orbital.
by philipraj_1F
Sun Oct 20, 2019 2:06 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Nodal Planes
Replies: 6
Views: 46

Re: Nodal Planes

Because of the shape of s orbitals, it is impossible for them to have nodal planes. This is unlike p, d, and f orbitals.
by philipraj_1F
Sun Oct 20, 2019 1:49 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Ordering of s and d orbitals
Replies: 4
Views: 60

Re: Ordering of s and d orbitals

It technically doesn't change what is being said, but they want 3d before 4s to arrange it in increasing energy.
by philipraj_1F
Sun Oct 20, 2019 12:16 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Allowed Values of Quantum Numbers
Replies: 1
Views: 58

Re: Allowed Values of Quantum Numbers

It depends on what orbital the last electron is in. For example, if the last electron were in the orbital with a magnetic quantum number of +1, then that would be the corresponding magnetic quantum number.
by philipraj_1F
Sun Oct 13, 2019 2:54 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Best Way To Study?
Replies: 56
Views: 1219

Re: Best Way To Study?

I feel that looking over the modules posted on the website after having a lecture on the topic also helps to strengthen my knowledge of the material.
by philipraj_1F
Sun Oct 13, 2019 2:49 pm
Forum: Properties of Light
Topic: 1B.19
Replies: 2
Views: 77

1B.19

What does it mean when it says report the difference as a percentage of the wavelength of the neutron? Question: Protons and neutrons have nearly the same mass. How different are their wavelengths? Calculate the wavelength of each particle when traveling at 2.75 * 10^5 m*s^-1 in a particle accelerat...
by philipraj_1F
Sun Oct 13, 2019 2:15 pm
Forum: Properties of Light
Topic: frequency of light
Replies: 2
Views: 52

Re: frequency of light

Frequency is equal to the ratio between the speed of light and wavelength, which stays the same.
by philipraj_1F
Sun Oct 13, 2019 2:12 pm
Forum: Properties of Light
Topic: speed of light
Replies: 10
Views: 101

Re: speed of light

I think that the speed of light changes depending on the material it travels through. Light moves slower through denser materials as particles can get in its way.
by philipraj_1F
Sun Oct 13, 2019 2:05 pm
Forum: Photoelectric Effect
Topic: Video Modules
Replies: 7
Views: 71

Re: Video Modules

It is very helpful as much of what it on the modules is the same as what is on the lectures. So if you ever were confused with a lecture it could be helpful to go back and watch the module associated with it.
by philipraj_1F
Thu Oct 03, 2019 3:04 pm
Forum: Significant Figures
Topic: Sig Fig Rules
Replies: 7
Views: 101

Re: Sig Fig Rules

For sig figs in general, you round to the lowest amount of sig figs when multiplying or dividing, and the least number of decimal places when adding or subtracting. This link on his website explains it: https://lavelle.chem.ucla.edu/wp-content/supporting-files/Chem14A/EVERYTHING_YOU_WANTED_TO_KNOW_A...
by philipraj_1F
Thu Oct 03, 2019 2:59 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Fundamentals E25
Replies: 5
Views: 88

Re: Fundamentals E25

I think formula units is a name for units in an ionic compound, while atoms refers to that of an element by itself, and molecules refers to that of a covalent compound. You would multiply it by avogadro's number the same way with anything else. So it would be .750 mol KNO3 x (6.022x10^23 formula uni...
by philipraj_1F
Thu Oct 03, 2019 2:53 pm
Forum: Administrative Questions and Class Announcements
Topic: Test 1 Breakdown
Replies: 1
Views: 56

Re: Test 1 Breakdown

I don't know about the types of questions, but I found that reviewing problems in the textbook and checking them with the solution manual personally helped me, as well as listing the variations of problems in each section
by philipraj_1F
Thu Oct 03, 2019 2:49 pm
Forum: Significant Figures
Topic: Sig Figs for Adding
Replies: 2
Views: 77

Re: Sig Figs for Adding

I believe that first you would add the two numbers together, and then you would round the final answer to the least number of significant figures present in any part of the problem (so in this case, round to the tenths place). Today in discussion, my TA mentioned that it is most important that our ...
by philipraj_1F
Thu Oct 03, 2019 2:44 pm
Forum: SI Units, Unit Conversions
Topic: Scientific Notation (general requirement for the course)
Replies: 5
Views: 79

Re: Scientific Notation (general requirement for the course)

I think we use scientific notation to write the answer with the correct number of significant figures. So if the answer was 12300 but the question only asks for 2 sig figs, we would write it as 1.2 x 10^4. If they do not specify which format we should use does it matter? Is there one that's better ...

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