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Grace Diaz 3F

HCL has a greater bond length making it easier for H+ to disassociate making it a stronger acid.

Grace Diaz 3F

Polarizing power has to do with a cations ability to distort an anions electron cloud. Smaller cations usually have a larger polarizing power.

Grace Diaz 3F

F- is a Lewis base. Anions are usually bases.

Grace Diaz 3F

It only applies to kinetic energy. For example the energy of a photon is measured by plank's constant times it's frequency.

Grace Diaz 3F

an ion-ion interaction is greater than an ion-dipole

Grace Diaz 3F

For momentum, either velocity or mass will usually be given. A question might ask you to solve for a missing variable.

Grace Diaz 3F

The Ph of a strong acid is lower than that of a weak acid, however the concentration of H+ is greater.

Grace Diaz 3F

Electronegativity increases across a period and decreases down a group.

Grace Diaz 3F

Lewis acids and bases are associated with the formation of molecules through electron donation, Lewis acids accept electrons and Lewis bases donate electron pairs. Bronsted Acids have to do with protons. Bronsted acids donate H+ abd Bronsted bases accept them

Grace Diaz 3F

The bond angles of a seesaw would be less than 120 degrees between the equatorial bonds, and less than 90 degrees between the axial and equatorial bonds.

Grace Diaz 3F

The hybridization orbital of a trigonal planar is sp^2 since it has three regions of electron density. A trigonal pyramidal would have a hybridization of sp3 since it has four regions of electron densities.

Grace Diaz 3F

Sigma bonds are always single bonds, or the first bonds in a double or triple bond. The remaining bonds of a double or triple bonds are pi bonds. This is easy to visualize when looking at hybridized orbitals. The hybridized sp orbitals form sigma bonds while the unhybridized p orbitals form pi bonds

Grace Diaz 3F

It says on the website that Bonding from 3.12 to the end of chapter 3 and Molecular shape and structure 4.1-4.7 will be included in the test. As for the number of questions, I'm not sure but I'd say anywhere from 5-8 if it's like the previous tests.

Grace Diaz 3F

Pretty sure it'll be cumulative, but with more questions on recently learned topics.

Grace Diaz 3F

The central atom should be the same as for a Lewis structure, in which we choose the atom with the lowest ionization energy to be the center of the structure. The ionization energy is the minimum energy required to remove an electron from an atom. Electronegativity refers to the pulling power of an ...

Grace Diaz 3F

I think it would be helpful to memorize the bond angles respective to the molecular shape.

Grace Diaz 3F

A compound that is polar has a greater electronegativity difference (considered ionic) versus one that is nonpolar. These types of compounds form dipoles.

Grace Diaz 3F

The angles are still 90 degrees

Grace Diaz 3F

momentum does affect wavelength, since they have a reciprocal relationship. That is the concept behind de Broglie's equation (wavelength= plank's constant/momentum)

Grace Diaz 3F

The radius increases down a group since the additional shells are further from the nucleus. It decreases down a period because as electrons start filling the same shell the increasing difference in charge causes electrons to be pulled closer to the nucleus.

Grace Diaz 3F

The formal charge equation is as follows
Valence electrons of atom-(number of lone pair electrons+ bonded electrons/2)
it's pretty easy to count the difference by just looking at the structure.

Grace Diaz 3F

The formula shows the there is a limit on the accuracy of our knowledge of an electron's position and momentum at the same time.

Grace Diaz 3F

The atom with the lowest ionization level is at the center of the Lewis structure. These are usually the ones on the left of the periodic table.

Grace Diaz 3F

You can eliminate B since the wavelength of the radiation would increase if frequency decreased, for D the energy of the radiation would decrease not increase if the frequency decreased. Since speed is a constant A can be ruled out as well. That leaves us with C.

Grace Diaz 3F

To calculate the differences between two energy levels you take the difference in their frequencies and end up with v=R[1/nf^2-1/ni^2]. Frequency=change in E/ h, is given by the Bohr frequency condition. If we substitute v for E/h, we can multiply the other side of the equation by plank's constant t...

Grace Diaz 3F

The energy of the orbitals goes according to their distance from the nucleus. So f would have the highest energy level and d,p, and s would follow.

Grace Diaz 3F

Heisenberg's equation measures the uncertainty in the position and momentum. When conducting an experiment, trying to measure the position of an electron can disrupt the outcome of the velocity, thus affecting momentum.

Grace Diaz 3F

The moles are not equal but the number of atoms of each element in both the reactant and product side are. The moles indicate the amount of compounds that can be created from the given atoms.

Grace Diaz 3F

There can only be one limiting reagent in a reaction. Since the limiting reagent determines the amount of product that can be created, once it has been used it would not make sense that another reactant could limit an already determined product.

Grace Diaz 3F

rounding atomic weight/mass can lead to small discrepancies so it's best not to do so until you've reached your answer. Usually I try to include at least three numbers after the decimal for accuracy when rounding to find the number of moles.

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Search found 30 matches

Re: Why HF is a weaker acid than HCl

Re: polarizing power

Re: Identifying Acids and Bases

Re: Kinetic energy

Re: Strength

Re: Momentum

Re: pH of acids

Re: Trend of Electronegativity

Re: Lewis vs Bronsted

Re: Seesaw

Re: Hybridization

Re: Sigma bonds

Re: Test 3

Re: Final Exam

Re: The central atom

Re: Bond Angles

Re: Polarity

Re: Square Planar Angles

Re: Heisenberg and Wavelength

Re: Atomic Radius

Re: Formal Charge Equation

Re: Heisenberg Indeterminacy Equation

Re: Lewis Structures

Re: HW 1.3

Re: Deriving Rydberg's Equation

Re: Energy levels of orbitals?

Re: What is the equation used for?

Re: Mole Coefficients in Chemical Equations

Re: Limiting reagents

Re: Periodic Table