CHEMISTRY COMMUNITY

Ryan Cerny 3I

I'm aldehyde, I am going to try and hide myself within the middle of the carbon chain......."-al"

This joke is an onomatopoeia, a pun, AND a helpful pneumonic for remembering ether functional group. Chose ether one to focus on.

Ryan Cerny 3I

Are we expected to be able to name compounds with multiple functional groups?

Ryan Cerny 3I

Why did the bacterium die?
It was invaded by a retro- isopropyl-hexane!!!!!!!!!

Ryan Cerny 3I

Do lewis acids ALWAYS correspond to electrophiles, and lewis bases with nucleophiles? Is it that clear cut and determinable?

Ryan Cerny 3I

K(units) = (L/mol)^(overall n -1) x s^-1

Ryan Cerny 3I

Thermodynamically-speaking does K, in addition to being the equilibrium constant, indicate standard conditions?

Ryan Cerny 3I

If CF4 is symmetric then why would it be ranked the highest for molar entropy? Shouldn't it be ranked the lowest?

Ryan Cerny 3I

We are supposed to rank CHF3, CF4, CH3F, and CH2F2 in order of increasing standard molar entropy.
The answer is CH3F<CH2F2<CHF3<CF4.

Why wouldn't it be CF4<CH3F<CHF3<CH2F2?

Thank you.

Ryan Cerny 3I

Here is a useful pneumonic device to help you associate reduction with gaining electrons and oxidation with losing electrons:

Reduction--> reducing (positive) charge (therefore e-s must be gained in the process)

Therefore, Oxidation--> loses e-s (by process of elimination)

Ryan Cerny 3I

For dStotal = dSsys + dSsurr what conditions make dStotal = to 0?

Ryan Cerny 3I

For a reaction A + B -> C + 2D with all gases, and the dH of the reaction is, say, 100kj, would the following parameters be scaled with x amount of A?:
(1) the dH (would it be xdH for that amount reacted)?
(2) the dn (would the net change in moles of gas be scaled)?

Ryan Cerny 3I

On the heating curve, when the enthalpy increase (q at constant pressure) increases the temperature (and we have a diagonal line with a positive slope) there is something very useful for which to take note: The lower the C (heat capacity) of the substance in a given phase, the steeper (more positive...

Ryan Cerny 3I

Will we be provided with all of the names of the compounds or do we have to memorize them? And if so which ones?

Ryan Cerny 3I

Before this class I always presumed that determining the relative strength of acids and bases would be challenging. Turns out learning about NaOH, for example, is pretty basic.

Ryan Cerny 3I

Also how would polydentates like C2O4^2- (often written as ox) affect this?

Ryan Cerny 3I

For actually writing the formula with brackets (not giving the long name) what would be the order? WHAT IS THE RULE FOR ORDERING THE LIGANDS? - Are the ligands placed in alphabetical order ACCORDING TO THEIR NAME (even though we're writing the symbols)? For example, for Diamminetetrahydroxochromate(...

Ryan Cerny 3I

Is it vital that we know how to determine how many ligands a TM cation can form? Is there even a way to deduce this?

Ryan Cerny 3I

I have found a total of 10 atoms located in the d-block (two of them being chromium and copper), do we have to know all 10 exceptions for the midterm? (what about the final?) Also, are we going to be asked to draw the electron configurations for f-block elements?

Ryan Cerny 3I

When we are told to balance a chemical equation (and are asked to include the phases of the atoms and molecules) how can we determine which phases to use?

Ryan Cerny 3I

I noticed that bond order was one of the topics covered on past midterms; where is that in the book? One would expect that to be located in near the end of CH3 which covers the specifics on bond lengths and energies. Am I just crazy?

Ryan Cerny 3I

Its true that the number of orbitals which belong to a specific sub shell is specific to which "l" you are referring. For instance, the s-subshell has 1 orbital, the p has 3, the d has 5, and the f has 7. Using rate of increase (2 orbitals/change in l) and the initial value (1 orbital) you...

Ryan Cerny 3I

I can't wait until we are finished with our chemistry final- then we Argon.

Which element is the most medicinal?
-Curium

Ryan Cerny 3I

Dr. Lavelle mentioned that copper and chromium are exceptions to the rule for writing electron configurations of atoms; wouldn't that mean that all of the atoms within both of the groups in which copper and chromium belong?

Ryan Cerny 3I

If (Psi)^2 that represents the probability of finding an electron, how does the Heisenburg equation relate to that?

Ryan Cerny 3I

Here is a long and complicated trick I can up with balance a complex chemical equation: 1) Find an atom this is only contained in one reactant and in one product. For which ever molecule contains more of that atom, assign a coefficient of "X" and scale the the molecules' coefficient (with ...

CHEMISTRY COMMUNITY

Search found 25 matches

Re: Post All Chemistry Jokes Here

Re: Functional Groups [ENDORSED]

Re: Post All Chemistry Jokes Here

Re: Electrophile Vs. Nucleophile

Re: Units of K

K

Re: Midterm Winter 2013 problem 5B

Midterm Winter 2013 problem 5B

Pneumonic Device

Change in the entropy of the universe

Scaling Enthalpy

The Heating Curve Graphical Comparisons of C

Are names provided? [ENDORSED]

Acids and Bases joke

Re: Ordering ligands within a complex (not naming!)

Ordering ligands within a complex (not naming!)

Ligand formation

D-block exceptions for midterm and f-block

Chemical Equations and Molecular Phases

Bond Order

Quantum numbers trick with angular momentum quantum number [ENDORSED]

Re: Post All Chemistry Jokes Here

Exceptions

wave functions and the heisenburg uncertainty [ENDORSED]

Balancing a chemical equation with multiple compounds