CHEMISTRY COMMUNITY

Gabriela Aguilar 4H

I thought it was based on the atomic radius and if so how?

Gabriela Aguilar 4H

An acid is considered to be electron deficient meaning it accepts electrons. Unlike water, it would not accept electrons rather it would be a hydrogen- donor, donating an H+ to a base. But it can also accept an H+ depending with what it is reacting.

Gabriela Aguilar 4H

HCL when disassociated it does so completely which makes it a strong acid because it won't go back with the H+ and therefore is able to donate the proton. On the other hand, HF will disassociate but not completely and therefore will go back with H+ making a weak acid because it is harder to take awa...

Gabriela Aguilar 4H

Transition metals can have many oxidation states because of their several electrons that have similar energies which meaning they can be removed or electron can be added.

Gabriela Aguilar 4H

To calculate pH you would take the negative log of Hydronium or H+
and to find the pOH you would take the negative log of [OH-].

pH= -log [H+]
pOH= -log [OH-]

Gabriela Aguilar 4H

I do not believe we are supposed to memorize the states or be able to determine them for 14 A.

Gabriela Aguilar 4H

That would be because of the electronegativity of Carbon being higher.

Gabriela Aguilar 4H

Lewis acids are electron acceptors and Lewis bases are electron donors.
Bronstad acids are proton donors and Bronsted bases are proton acceptors.

Gabriela Aguilar 4H

A polydentate is a ligand that can donate multiple pairs while a monodentate can only donate one pair.
For example, water is monodentate that can only give up an H
and EDTA is polydentate that can donate multiple pairs.

Gabriela Aguilar 4H

The pKw will always be 14 because there can't be a pH higher than 14.

Gabriela Aguilar 4H

It would be decreasing energy level making it a negative value and when that occurs energy is released.

Gabriela Aguilar 4H

That will always represent H2O (water) which has a bent shape so it shall always be assumed there are two lone pairs.

Gabriela Aguilar 4H

Ex: Methane CH4
has an electron configuration of carbon is 1s 2s2 2p2 --> 2s2 2px1 2py1
the excited electron configuration becomes 2s1 2px1 2py1 2pz1 this is true because it forms 4 equal hybridized orbitals

Which is why it is called 2sp3

Gabriela Aguilar 4H

For planar geometries, you can just divide 360 by the number of angles, for example, a trigonal planar 360/3 and for 3-d geometries, it is best to memorize which should not be that hard.

Gabriela Aguilar 4H

Although both characteristics can be seen in a compound one will be most dominant, which will most likely determine the name of the character in the compound. (At least that is how I see it)

Gabriela Aguilar 4H

It also helps in determining the shape of a molecule. Whether it is bent and therefore also the angles.

Gabriela Aguilar 4H

It mostly depends on the repulsion;

Lone-lone pair > lone - bonding pair > bonding-bonding pair replusion.

Gabriela Aguilar 4H

It mostly depends on how many electron density areas there are in a shape and in order to give the angle, I would memorize them.

Gabriela Aguilar 4H

If I am not mistaken I remember Dr. Lavelle saying that the correct way to draw the Lewis structure would be with the 120-degree spacing, but it is fine to draw it without the spacing.

Gabriela Aguilar 4H

If the d- orbital is is full and you have to take away electrons then the d -orbital would be written first followed by the s - orbital because it is more favorable to take away electrons from it. It also depends on what the coefficient is . Ex: Zn: [Ar] 4s^2 3d^10 ---> would be [Ar] 3d^10 4s^2

Gabriela Aguilar 4H

A weak bond would be a strong acid because an acid is an electron acceptor meaning that it has fewer electrons and therefore the bond is weaker.

Gabriela Aguilar 4H

The f- block are the elements that are outside the periodic table, but they go between La (57) and Ha (72). You can just look at the periodic table.

Gabriela Aguilar 4H

De Broglie is only used when the question explicitly says use the de Broglie equation to find whatever it is they are asking.

Gabriela Aguilar 4H

The electrons are removed first from the S orbital because they are the ones with less influence on the nucleus.

Gabriela Aguilar 4H

You would just rearrange the equation EK = h v - workfunction
to solve. The Ek should be given if you are looking for workfunction.

Gabriela Aguilar 4H

For all nf

l = 3 always

(i.e 5f ---> n=5, l= 3)

Gabriela Aguilar 4H

We have to memorize/ know that
s-orbital=1 orbitals = 2 e-
p-orbital=3 orbitals= 6 e-
d-orbital=5 orbitals= 10 e-
f-orbital= 7 orbitals = 14 e-

To find e-, simply multiply by 2

Gabriela Aguilar 4H

Quantum will be tested on Test 2. You can look in the syllabus for the exact description.

Gabriela Aguilar 4H

E=hv is the same as Energy(photon) = to hv, in other words, it is proportionate to the frequency.

Gabriela Aguilar 4H

Light hits a sodium metal surface and the velocity of the ejected electron is 6.61 x 105 m.s-1. The work function for sodium is 150.6 kJ.mol-1. Answer the following three questions. A. What is the kinetic energy of the ejected electron? How would one go about to solve this problem? What equation wou...

CHEMISTRY COMMUNITY

Search found 30 matches

Re: Double bond lengths

Re: Why is water always a lewis base?

Re: Cl- and F-

Re: TM and oxidation states

Re: Calculate pH or pOH [ENDORSED]

Re: Determining states

Re: partial charge

Re: Lewis Acids and Bases and Bronsted?

Re: Polydentate and Monodentate

Re: Kw

Re: electron transitions

Re: Identifying Hybridization

Re: Imagining Hybridization

Re: Bond Angles

Re: Ionic & covalent character

Re: Repulsion Strength

Re: Lone Pairs

Re: Formula for determining bond angle

Re: Drawing Lewis Structures with VSPER

Re: E- configuration

Re: Relation between strong acid and weak bond

Re: Electron Configuration

Re: De Broglie Formula vs. Speed of Light Formula

Re: Ground State to Ion with D subshell

Re: Work Function

Re: Orbital Shape for Larger Quantum Numbers

Re: quiz 2: 5-s orbital

Re: Test 2 [ENDORSED]

Re: Photons and E=hv

Re: Photoelectric Effect Module