CHEMISTRY COMMUNITY

Ayona Sengupta

I saw this question under the self-test section of example 8.1 in the textbook and I'm a little confused on how we'd use both the densities of water and ice in this question. Water expands when it freezes. How much work does 100 g of water do when it freezes at 0.0 C and pushes back the metal wall ...

Ayona Sengupta

Chlorine does.

Ayona Sengupta

Sometimes you might also need to rearrange and plug this formula into a larger question/different formula. For example, you might rewrite E=hv to E=hc/lambda.

Ayona Sengupta

One oxygen molecule binds to each myoglobin.
Four oxygen molecules bind to each hemoglobin thus, I think four myoglobin would make up one hemoglobin. I'm not entirely sure though.

Ayona Sengupta

I've heard there are some cases in which we can assume X i.e. the change between initial and final values in the table, is negligible. How do we identify when we can consider x negligible?

Ayona Sengupta

I understand the relationship between bond length and bond strength but can someone explain to me the chemical reasoning behind why bond length affects bond strength?

Ayona Sengupta

Neutralisation can occur between a strong base and a strong acid. With weak acids and strong bases, an equilibrium mixture is formed instead. Same with strong acids and weak bases. In a mixture of a weak base and a weak acid, complete neutralisation cannot occur.

Ayona Sengupta

An easier way to look at this is to just keep an eye out for Ns and COOs. Count each of those as a possible binding site. A monodentate has one, bidentate has two etc.
For example:
NH3 is a monodentate.
(CH2N(CH2COO-)2)2 is a bidentate.
HN(CH2CH2CH(CH3)2 is a tridentate.

Ayona Sengupta

It's a polar compound as it is not symmetrical in shape and has polar bonds that do not cancel each other out. CBr2Cl2 is tetrahedral in shape. It has polar bonds in C-Br and C-Cl. Its shape is not symmetrical. Hence, it is a polar molecule. It appears to cancel each other out but does not when tran...

Ayona Sengupta

When a system is at equilibrium and the pressure is increased, equilibrium shifts to the side with less particles. So if all three compounds were in their gaseous states, increasing pressure would cause equilibrium to shift to the left i.e. side with less moles of gas. If pressure was decreased, equ...

Ayona Sengupta

Both amphoteric and amphiprotic substances can act as acids and bases. It's just that one term, amphoteric refers to the whether the compound acts as an acid or base in a given medium and the other, amphiprotic, refers to a compound's ability to donate or accept a proton. Sometimes compounds are bot...

Ayona Sengupta

As far as I'm aware, hybridization is more of a theoretical concept. It's supposed to explain certain structural issues that other bonding theories like VSEPR can't. Conceptually though, it's just different orbital interfering either constructively or destructively to give rise to equivalent orbital...

Ayona Sengupta

As far as I'm aware, they're closely related and the Aufbau Principle originates from Pauli's exclusion principle. When we're writing out electronic configuration, I guess we just have to be mindful of all three.

Ayona Sengupta

I'm not entirely sure either but I think you're supposed to calculate the moles on the reactant side and the moles on the reactant side (using the limiting reagent) and find the difference between the two. Again, I'm not entirely clear on this either.

Ayona Sengupta

The simplest way to think about it, I think, is to just remember that formula units just refer to the number of moles x Avagadro's number. To obtain the number of moles, you'd just need to divide mass by molar mass, as was said previously.

Ayona Sengupta

I guess for now you might not be penalized but not writing out states might confuse you later on when writing equations for things like electrolysis where you might need to know the product formed or accumulating. It also helps for when you might need an understanding of the qualitative side of thin...

CHEMISTRY COMMUNITY

Search found 16 matches

Self Test Example 8.1A

Re: Electron Affinity

Re: Speed of light wavelength equation [ENDORSED]

Re: Question on practice exam [ENDORSED]

X in ICE table

Bond Length and Bond Strength Relationship

Re: Neutralization

Re: Determining Denticity

Re: CBr2Cl2

Re: Pressure Effect

Re: Amphoteric vs amphiprotic

Re: Chemical reasoning for hybridization

Re: Aufbau principle

Re: Net moles produced (Test question)

Re: Formula Units [ENDORSED]

Re: States of Matter in Chemical Equations