Popular General Chemistry Topics

[drjene]

In ya'll opinion, what are the most popular general chemistry topics on the MCAT? Like a MUST know topic for the MCAT

Thank you!

---

Members don't see this ad.

 

[mejorization]

In ya'll opinion, what are the most popular general chemistry topics on the MCAT? Like a MUST know topic for the MCAT

Thank you!

deltaG=deltaH-TdeltaS

 

[neelyboy]

MUST KNOW: Henderson Hasselbalch
pH = pKa + log [base/acid] = pKa + log [A-/HA]

if pH < pKa, then the species is more prevalent in the protonated state as there will be a higher concentration of acid (HA) to fit the HH equation

if pH > pKa, then the species will be more prevalent in the deprotonated state as there will be a higher concentration of base (A-) to fit the HH equation

pKa = -log Ka
Ka = 10^-pKa

pH = -log [H+]
[H+] = 10^-pH


For acids/bases:
If it's a strong acid or base, pH = - log[HX]] or pOH = -log[MOH]

If it's weak, pH = 1/2pKa - 1/2log[HA] is the best shortcut to calculate the pH of weak species (Thanks TBR!!!)

For titrations:


pH = pKa at the halfway point for weak species titrated by strong species
and at the equivalence point (where moles acid = moles base) pH = (pKa + pH(of titrant))/ 2

for strong species titrated by strong species, the pH is ALWAYS 7 at the equivalence point.

 

[salim271]

Probably some random questions could show up on molecular geometry. You should at least know the basic ones: linear, trigonal planar, tetrahedral, trigonal bipyramidal, and octahedral. You should know the derivatives for them at least up to tetrahedral (bent, trigonal pyramid, etc). Also remember the bond angles 180, 120, 109.5, etc, and when there are nonbonding orbitals the bond angles are always less than those numbers.

Edit: I like this site http://intro.chem.okstate.edu/1314f00/lecture/chapter10/vsepr.html

 

[Temperature101]

Electrochemistry and sound seem to usually appear on the mcat.

 

[Donald Juan]

https://www.aamc.org/students/download/85562/data/ps_topics.pdf

Here's the official list of topics in the physical science section. Don't worry, they're not trying to trick you, those are the real topics covered.

 

[EnergyDrink]

All of them if you want to get above an 8...

 

[inquiry101]

leave no stone unturned

 

[centrigeugle]

One thing I'll suggest:

Grow comfortable using dimensional analysis as the ONLY way of solving a problem. Units really are that important.

 

[bambam02]

LEO the lion says GER

 

[salim271]

LEO the lion says GER

This is the MCAT not Chem 101

 

[CodeBlu]

One thing I'll suggest:

Grow comfortable using dimensional analysis as the ONLY way of solving a problem. Units really are that important.

this x 1000000000000000000 m/s^2

 

[Whatyousay]

No one mentioned Le Chatlier's?

Easy to learn, easy to apply, easy to test.