Recent content by Hammad Shahid

Thanks. That makes sense. This is exactly what I was looking for.

I think I wasn't clear in the question. I meant that having a higher charge will lower the answer in end. Since the answer is in mV, if let's sat having a +1 charge gives -50 mV as the answer, a +2 charge will give -25 mV. I didn't understand why having a higher charge in a species would lead to...

The equation: V(x) = 61*mV*(1/z)*(log[X(o)/X(i)]) Where: z = valence (charge of ion) [X(o)] = reference concentration (outside the cell) [X(i)] = concentration of species inside the cell I want to understand the intuition behind why the mV decrease as the charge increases. From what I...

I'm sorry, but I don't quite understand this. Is there an example of this that could be given.

Ok I was actually concerned on why the assumption may not hold for neutralizing more acid?

In my class, we're told to assume the rxn goes to completion if K is 10^10 or greater, and since this is pretty close to that, I put in that assumption. Oh wow, I just realized that the net reaction is the acetate with water rxn in reverse. Thanks, that'll save me quite some time on the actual...

The problem states that I'm adding a certain volume of a known [KOH] to a certain volume of a known [HCH3COO]. The goal is to calculate the final pH. Since I don't know the K value of the rxn of HA w/ OH-, I set up 2 equations and combined their K values to derive the K value. Since the new...

Yes I know that. That's why I'm confused on why the energy diagram would have it as an sp3 hybridization rather than show the lone pair separately.

Alright. So for the energy diagram, how would I draw this? Sp3 or Sp2 + 2p2 ?

In the reaction between NH3 and BF3, the boron will bond with the extra lone pair in NH3. This is only possible if we let Nitrogen stay unhybridized. However, the molecular structure for NH3 is tetrahedral (and is therefore hybridized as sp3) due to distancing the e- pairs. If we go by this...

Right now we are learning about the Lewis definition of acids and bases. I don't get the clear difference between co-ordinate covalent and ionic bonds. For example, AlCl3 is listed as a co-ordinate covalent bond because experiments show that it behaves like a covalent molecule. Why can't it be...

Ok, so if there are no particles at all, how to water molecules escape from the solvation shell in the first place? Wouldn't the water molecules be in a lower energy shell still solvated around the ions rather than crystallization?

Ok, that makes a lot of sense. But then, why doesn't the dissolved salt also provide places to form crystals around? Is it too small? And would the dust also not interfere with crystal forming, at least to some degree? I am having trouble understanding how solute can both help form crystals and...

From what is taught in class, if there are impurities in water, the water can form crystals around it easier. But now I'm confused: We're learning about the freezing point depression, and apparently having solute particles interferes with the forming of crystals in solution?

Today we had a chem lab on colligative properties. The lab was focused on seeing how the freezing point of water would change w/ the addition of solutes. Now, the first part was to measure the freezing point of water. This was done by placing an apparatus of DI room temp water into a salt-ice...