Search found 30 matches

by Akhil Paladugu 3G
Sat Dec 08, 2018 10:19 pm
Forum: Lewis Acids & Bases
Topic: Lewis acids and pH
Replies: 2
Views: 133

Re: Lewis acids and pH

Many Lewis acids are water reactive and will hydrolyze in water. Lewis bases will usually act as Bronsted bases as well and protonate in water thus raising the pH
by Akhil Paladugu 3G
Sat Dec 08, 2018 10:18 pm
Forum: Amphoteric Compounds
Topic: What makes As2O3 amphoteric?
Replies: 1
Views: 106

Re: What makes As2O3 amphoteric?

Arsenic is a typical metalloid. In case of metalloids, usually, the oxide in the lower oxidation state is amphoteric and the one in the higher state is acidic.
by Akhil Paladugu 3G
Sat Dec 08, 2018 10:14 pm
Forum: Bronsted Acids & Bases
Topic: Base Strength
Replies: 4
Views: 140

Base Strength

Which is the stronger base, the hypobromite ion, BrO , or morphine, C17H19O3N?

How do we justify this answer without using Kb values
by Akhil Paladugu 3G
Sun Dec 02, 2018 11:06 pm
Forum: Hybridization
Topic: Sigma bonds
Replies: 9
Views: 126

Re: Sigma bonds

The first bond between is always a sigma bond, every additonal bondage (i.e. double, triple bond ) is a pi bond. Therefore a single bond is a sigma bond, but a double bond has one sigma bond and one pi bond, and a triple bond has one sigma bond and 2 pi bonds.
by Akhil Paladugu 3G
Sun Dec 02, 2018 11:03 pm
Forum: Hybridization
Topic: hybridization
Replies: 13
Views: 266

Re: hybridization

You have to first draw out the lewis structure, then count the electron densities and then the matching spd number. For 1 electron density it is s, 2=sp, 3=sp^2, etc.
by Akhil Paladugu 3G
Sun Dec 02, 2018 10:57 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Water
Replies: 4
Views: 86

Re: Water

Depending on the circumstances, H2O can act as either a Brønsted-Lowry acid or a Brønsted-Lowry base. Water is not the only substance that can react as an acid in some cases or a base in others, but it is certainly the most common example. A substance that can either donate or accept a proton, depen...
by Akhil Paladugu 3G
Sun Nov 25, 2018 9:39 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: test #3
Replies: 14
Views: 356

Re: test #3

If we havent covered it in lecture, it should not be on the test. Test 3 will cover the material we learned from after the midterm to the lecture last Monday (11/18).
by Akhil Paladugu 3G
Sun Nov 25, 2018 9:37 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Sigma and pi bonds
Replies: 4
Views: 78

Re: Sigma and pi bonds

Pi bonds are usually weaker than sigma bonds because the orbital paths are parallel so there is much less overlap between the p-orbitals.
by Akhil Paladugu 3G
Sun Nov 25, 2018 9:35 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polar vs Nonpolar
Replies: 5
Views: 87

Re: Polar vs Nonpolar

A molecule is nonpolar if the dipole moments cancel out. Usually if the molecule is symmetric it is nonpolar as well.
by Akhil Paladugu 3G
Sun Nov 18, 2018 8:49 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Angles Less Than a Certain Value
Replies: 4
Views: 88

Re: Angles Less Than a Certain Value

The lone pair repulsion pushes the other bond electron pairs to form a smaller angle. That is why denote it [censored] less than 109.5
by Akhil Paladugu 3G
Sun Nov 18, 2018 8:44 pm
Forum: Hybridization
Topic: Sigma/Pi bonds
Replies: 6
Views: 137

Re: Sigma/Pi bonds

A sigma bond (σ bond) is a bond formed by the overlap of orbitals in an end-to-end fashion, with the electron density concentrated between the nuclei of the bonding atoms. A pi bond (π bond) is a bond formed by the overlap of orbitals in a side-by-side fashion with the electron density concentrated ...
by Akhil Paladugu 3G
Sun Nov 18, 2018 8:42 pm
Forum: Hybridization
Topic: Hybridization
Replies: 2
Views: 62

Hybridization

Can someone explain the conceptual nature of hybridization?
by Akhil Paladugu 3G
Mon Nov 12, 2018 2:30 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: Hydrogen Bonds
Replies: 14
Views: 207

Re: Hydrogen Bonds

Yes, hydrogen bonds are dipole-dipole interactions between hydrogen and N,O, or F.
by Akhil Paladugu 3G
Mon Nov 12, 2018 2:28 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polarizability and polarizing power
Replies: 1
Views: 70

Re: Polarizability and polarizing power

I found a website that talks about this as such http://wwwchem.uwimona.edu.jm/courses/CHEM1902/IC10K_MG_Fajans.html The polarizing power and polarizability that enhances the formation of covalent bonds is favoured by the following factors: Small cation: the high polarizing power stems from the great...
by Akhil Paladugu 3G
Mon Nov 12, 2018 2:23 pm
Forum: Properties of Light
Topic: Test 3
Replies: 24
Views: 493

Re: Test 3

Test 3 Will most likely cover everything we've learned from after the midterm through week 8, as the test is during week 9.
by Akhil Paladugu 3G
Mon Nov 05, 2018 12:42 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: 3d and 4s
Replies: 4
Views: 125

Re: 3d and 4s

Electrons fill low energy orbitals (closer to the nucleus) before they fill higher energy ones. Where there is a choice between orbitals of equal energy, they fill the orbitals singly as far as possible.That is why the 4s orbital is filled before the 3d orbital, however when denoting these orbitals ...
by Akhil Paladugu 3G
Mon Nov 05, 2018 12:38 am
Forum: Ionic & Covalent Bonds
Topic: Lattice energies of solids
Replies: 1
Views: 46

Re: Lattice energies of solids

I do not think we are expected to know it. Just know that lattice energy is a measure of the energy released when ions are combined to make a compound and that it is a measure of the cohesive forces that bind ions.
by Akhil Paladugu 3G
Mon Nov 05, 2018 12:34 am
Forum: Octet Exceptions
Topic: electron affinity
Replies: 4
Views: 107

Re: electron affinity

Fluorine, though higher than chlorine in the periodic table, has a very small atomic size. This makes the fluoride anion so formed unstable (highly reactive) due to a very high charge/mass ratio. As a result, fluorine has an electron affinity less than that of chlorine.
by Akhil Paladugu 3G
Mon Oct 29, 2018 11:38 pm
Forum: Properties of Electrons
Topic: Orbitals
Replies: 5
Views: 261

Re: Orbitals

In general, without memorizing, the number of orbitals in a subshell can be found by using the value of the second quantum number, l, the number of orbitals is equal to 2l + 1. The second quantum number for the 4p subshell l is 1, thus 2(1)+1 = 3, there are 3 orbitals in the 4p subshell.
by Akhil Paladugu 3G
Mon Oct 29, 2018 11:32 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Calculating Velocity
Replies: 4
Views: 134

Re: Calculating Velocity

It is important to not have present values on what you think the answer in velocity is. Yes that answer may seem super small, but if you followed the process of the question carefully there is a chance that you end up with that answer. You should judge it based on the rest of the given data, that is...
by Akhil Paladugu 3G
Mon Oct 29, 2018 11:29 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg- In relation to wavelength
Replies: 7
Views: 145

Re: Heisenberg- In relation to wavelength

Because of the inverse relationship between momentum (p) and wavelength(lambda) is given in De Broglie's equation, lambda=h/p, therefore, when p is increased, the value of lambda decreases.
by Akhil Paladugu 3G
Sun Oct 21, 2018 4:23 pm
Forum: Significant Figures
Topic: Sig figs and percentages
Replies: 3
Views: 309

Re: Sig figs and percentages

Percentages that are given do not count as sig figs as there is no uncertainty in the measurement. Therefore you wouldnt consder it when determining the number of sig figs in your answer.
by Akhil Paladugu 3G
Sun Oct 21, 2018 4:20 pm
Forum: Quantum Numbers and The H-Atom
Topic: test 2 topics
Replies: 3
Views: 101

Re: test 2 topics

I dont think writing an electron configuration will be on the test, as we did not go over that in Fridays Lecture. Dr. Lavelle said to be comfortable with the following topics: photoelectric effect, De Broglie wavelengths, Heisenberg Uncertainty, Atomic Spectra, and quantum #s.
by Akhil Paladugu 3G
Sun Oct 21, 2018 4:15 pm
Forum: Trends in The Periodic Table
Topic: Test 2 Topics Covered Question
Replies: 2
Views: 80

Re: Test 2 Topics Covered Question

Im sure we would not be tested on something the Dr.Lavelle did not go over in class. So I would make sure I was super comfortable with everything up to the E set, but it doesnt hurt to read ahead for the F set just to familiarize yourself.
by Akhil Paladugu 3G
Fri Oct 12, 2018 11:23 am
Forum: Empirical & Molecular Formulas
Topic: F13
Replies: 3
Views: 167

Re: F13

Here is a link that really helped with nomenclature when I was first learning it:

http://chemed.chem.purdue.edu/genchem/t ... names.html

Hope this helps!!
by Akhil Paladugu 3G
Fri Oct 12, 2018 11:18 am
Forum: Significant Figures
Topic: significant figures
Replies: 5
Views: 299

Re: significant figures

Ive always been told to match the significant figures of my answer with the lowest sig figs given in the problem that is not a constant/converstion factor
by Akhil Paladugu 3G
Fri Oct 12, 2018 11:16 am
Forum: Properties of Light
Topic: De Broglie Equation
Replies: 3
Views: 34

Re: De Broglie Equation

De Broglie first used Einstein's famous equation relating matter and energy: E=mc^2 Using Planck's theory which states every quantum of a wave has a discrete amount of energy given by Planck's equation: E=hν he then set them equal to each other mc^2=hν Because real particles do not travel at the spe...
by Akhil Paladugu 3G
Fri Oct 05, 2018 1:09 am
Forum: Significant Figures
Topic: Sig Figs
Replies: 5
Views: 95

Re: Sig Figs

I would usually go with the data provided because it is hard to determine whether conversion factors are "perfect conversions" where you would ignore significant digits, whereas the given data is often more clear.
by Akhil Paladugu 3G
Fri Oct 05, 2018 1:06 am
Forum: Balancing Chemical Reactions
Topic: Balancing reactions tips
Replies: 29
Views: 766

Re: Balancing reactions tips

Also when you are balancing an equation that involves diatomic molecules, such as O2 and you need an odd number of Oxygens on one side, something that has worked for me is to keep fractional coefficients until the equation has the same number of moles of each element on each side, and then multiply ...
by Akhil Paladugu 3G
Fri Oct 05, 2018 12:56 am
Forum: Limiting Reactant Calculations
Topic: Limiting Reactant
Replies: 8
Views: 185

Limiting Reactant

When doing limiting reactant problems I have been told to convert the given samples of reactants (in grams ) to moles separately and calculate two separate theoretical yields using stoichiometry and see which one produces less product in order to determine the limiting reactant. Is there a more effi...

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