CHEMISTRY COMMUNITY

Lauren Sanchez 3D

To what extent will this possibly be on the final?

Lauren Sanchez 3D

To add on, pH + pOH = 14

Lauren Sanchez 3D

So a strong acid and weak base will produce an acidic solution while a weak acid and strong base will produce a basic solution?

Lauren Sanchez 3D

I remember hearing about the term amphiprotic. What is the difference between amphiprotic and polyprotic?

Lauren Sanchez 3D

So if an equation has the double arrows, then it is a weak acid, but if the arrow is only one way, then it is a strong acid?

Lauren Sanchez 3D

We will only have to calculate the pH for strong acids and bases.

Lauren Sanchez 3D

Being a proton donor and an electron acceptor are the same thing because once the acid donates or loses a proton, it can then accept an electron pair.

Lauren Sanchez 3D

ryanhon2H wrote:Strong bases fully dissociate in water, while weak bases only partially dissociate, as the strength of the base depends on its ability to fully dissociate.

Is this why the balanced equation for strong acids have a one-way arrow while weak acids have a two-way arrow?

Lauren Sanchez 3D

Sadhana_Dicussion_4A wrote:I think all we need to know is pH<7 is considered to be an acid, pH>7 is considered to be a base, and pH=7 is considered neutral. Also, I think we should know how to find the pH of a solution given the concentration, and vice versa.

How do we find the pH of a solution given the concentration?

Lauren Sanchez 3D

Organic acids have carbon while inorganic acids do not have carbon.

Lauren Sanchez 3D

Cisplatin stops the growth of cancer cells, but not exclusively, so it would also stop the growth of healthy cells.

Lauren Sanchez 3D

How do we know which is the acid or base?

Lauren Sanchez 3D

A chelate complex is when there are two or more separate coordinate bonds between a polydentate ligand and a single central atom.

Lauren Sanchez 3D

kpang_4H wrote:
Bilal Pandit 3F wrote:They are used when the ligand has a prefix itself, so the ligand would have a di, tri, etc, so instead of saying didi, you would just say dis.

How do you know which is the ligand?

I believe that the ligands are the atoms that surround the transition metal.

Lauren Sanchez 3D

The roman numeral comes from the oxidation state of the transition metal.

Lauren Sanchez 3D

chari_maya 3B wrote:Why are different strength bonds treated the same when applying VSEPR?

I think it has to do with the idea that the electrons account for one region of electron density, as in the bond strength does not matter as much as how many actual regions of electron density a molecule has.

Lauren Sanchez 3D

Do we need to know the angle degrees for all of the shapes as well?

Lauren Sanchez 3D

Regions of electron density include bonding pairs as well as lone pairs.

Lauren Sanchez 3D

So if there are only two areas of electron density, that is when they are opposite of each other due to the strong repulsion?

Lauren Sanchez 3D

NO3- would have the notation AX3 because the central atom has 3 atoms bonded to it. If there are any lone pair e-, then the E part of the notation would have to be used.

Lauren Sanchez 3D

In this compound, is it trigonal pyramidal because even though there are 4 regions of e- density, one of the regions is a lone pair?

Lauren Sanchez 3D

Are there atoms that commonly are radicals? Or can any atom be a radical?

Lauren Sanchez 3D

How do you draw a dipole moment?

Lauren Sanchez 3D

So if the difference in electronegativity is greater than 2, then the bond is ionic?

Lauren Sanchez 3D

Victoria Otuya 4F wrote:I learned an easier way to remember the formal charge equation: valence electron -(dots + line).

That is a really good way to remember it!

Lauren Sanchez 3D

So triple bonds pull the nuclei even closer then? Which then makes them even stronger than double bonds?

Lauren Sanchez 3D

What about the example where we just drew a pentagon with a circle in the middle? Could that work?

Lauren Sanchez 3D

Is this why some elements end up breaking the octet rule?

Lauren Sanchez 3D

Midori Hupfeld 3D wrote:And, we learned that radicals are also an exception to the octet because they have an odd number of electrons (unpaired electrons).

Does this mean that radicals are more reactive then?

Lauren Sanchez 3D

I remember seeing that the valence electron count for some elements repeat or skip a count, which ones would that be?

Lauren Sanchez 3D

What is the difference between ionic and covalent bonds?

Lauren Sanchez 3D

No, I do not think so

Lauren Sanchez 3D

So is the resonance structure the average of all the possible lewis structures for a certain bond?

Lauren Sanchez 3D

What are the odd configurations that we should know?

Lauren Sanchez 3D

Just to clarify, what are the periodic trends for ionization energy?

Lauren Sanchez 3D

I believe it is because a noble-gas configuration of electrons is the most stable for an atom to have.

Lauren Sanchez 3D

So as the uncertainty of one variable goes up, the other goes down?

Lauren Sanchez 3D

The H refers to Planck's Constant, which is equal to 6.626 x 10^-34 Js.

Lauren Sanchez 3D

So in order for the electron to be ejected, the frequency of the light has to be enough? The intensity does not matter if the frequency is not high enough right?

Lauren Sanchez 3D

How do we figure out if the electron spins up or spins down?

Lauren Sanchez 3D

Does the Nodal Plane represent the graph of the orbital functions?

Lauren Sanchez 3D

So, De Broglie's equation can only be applied to things that have a mass and velocity (p)?

Lauren Sanchez 3D

Having wavelike properties means that the particle behaves like a wave. I am not sure what particle-like properties refer to though.

Lauren Sanchez 3D

So, if a particle has wavelike properties, then the particle itself is somewhat moving in a wave pattern?

Lauren Sanchez 3D

i believe that Planck's Constant (h) is also used in De Broglie's Wave Equation

Lauren Sanchez 3D

When talking about photons, they are quantized right? And that means that they are counted as whole numbers rather than values like 2.5 or 3.67 etc.?

Lauren Sanchez 3D

Will questions regarding temperature be on the first test?

Lauren Sanchez 3D

I was also a little confused with this topic too, but I was informed that the question itself can present the elements in the correct order already (at least for this first test)

Lauren Sanchez 3D

Will we receive a periodic table to use during the tests?

Lauren Sanchez 3D

Thank you all for the information on what to study for the first test!

Lauren Sanchez 3D

Just to make sure, the homework problems are now due during our actual discussions right?

Lauren Sanchez 3D

My TA also said that an incorrect answer could still receive some partial credit with the correct work/steps, so I think it is a good idea to show work.

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