CHEMISTRY COMMUNITY

Marisa_Woo_2G

Hi everyone!

I was wondering if someone could clarify the equatorial bond angle on cyclohexane. Is the equatorial bond angle not 90 degrees because the carbon has bond angles of 109.5 degrees or is this due to other reasons like electrostatics?

Thanks so much!

Marisa_Woo_2G

If a bear in Yosemite and a bear in Alaska both fall into the water, which one dissolves faster?

The one in Alaska, because it's polar. :)

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If you're not part of the solution, you're part of the precipitate. :)

Marisa_Woo_2G

What do you call a tooth in a glass of water?

A one molar solution :)

Marisa_Woo_2G

I think Dr. Lavelle had mentioned that the question will either specify to name the compound (in which you may choose to name it with iupac or common naming) or it will specify to name the compound with iupac naming.

Marisa_Woo_2G

Hi all! I was wondering if someone could explain to me the relationship between molecularity and the overall rate law. Is it that a unimolecular reaction would translate to a first-order reaction? Or is this different as there may be intermediates in the actual reaction that affect the molecularity ...

Marisa_Woo_2G

To my understanding, the steady-state approximation is when you determine if the concentration of the intermediate product/reactant is constant in the rate limiting slow step. If the proposed mechanism is correct, the intermediate that is formed and used is in a low amount and therefore constant dur...

Marisa_Woo_2G

I believe that generally the format is to put "Electrode- Anode (Solid) I Aqueous solution- Anode (aq) II Aqueous solution- Cathode (aq) I Electrode- Cathode (Solid)". The comma refers to if the redox reaction does not have a solid that can be used as an electrode. In this case, platinum m...

Marisa_Woo_2G

Hi everyone! I just wanted to clarify the contents of a copper-zinc battery as from the course reader. I know Dr. Lavelle said that the electrodes were made out of Zinc and Copper, but what is the solution that the electrodes are in? Is it Zn 2+ and Copper 2+ respectively since this is where the ele...

Marisa_Woo_2G

Gibbs free energy is the available energy from a reaction that can be used for work. When you have a large negative change in Gibbs free energy, the reaction is spontaneous/more favorable and will move in a forward direction. One can predict spontaneity with this value. The change in Gibbs free ener...

Marisa_Woo_2G

Degeneracy (W) is the number of ways of achieving a given energy state, or the number of different ways a particle can be in a different position, but still have the same energy. This means that states would exist with the same energy, but with per say different structure. I believe that if there is...

Marisa_Woo_2G

Hi! To my understanding, I solved this problem with Hess's law for the first part and then the method #3 with the standard heats of formation. First, I set up the final chemical equation we are trying to find, the formation of dinitrogen pentaoxide: The final equation is: N 2 (g) + 5/2 O 2 (g) --> N...

Marisa_Woo_2G

You could technically do a titration for a weak acid and a weak base; however, this would be very difficult as both acids and bases would change the overall pH of the solution. You would not be able to differentiate between the two. In a tritration, you are able to choose the titrant to add to the u...

Marisa_Woo_2G

To add on, most organic acids and bases (with carbon) are generally weak acids and bases.

Marisa_Woo_2G

Hi all!

I was wondering what units we would use when we calculate an equilibrium concentration? Would it be molarity or would it have no units like the equilibrium constant?

Thanks!

Marisa_Woo_2G

Just to clarify, the values used to calculate K and Q should be concentrations? Would this refer to molar concentrations like moles/liter and molarity for aqueous solutions? And then partial pressure for concentrations of gas?

Marisa_Woo_2G

Hi all!

I was wondering if someone could give me a definition of anti-bonding orbitals? Does this just refer to the energy levels in the molecular orbital theory?

Thanks in advance!

Marisa_Woo_2G

A cation is an atom with its outermost electron(s) removed, while an anion is an atom with outermost electron(s) added. This is important because atoms generally want to become more stable and have the full electron configuration of a noble gas. Cations tend to be elements on the left-hand side of t...

Marisa_Woo_2G

What do you get when you cut an avocado into 6.02214x10²³ pieces?

Guacamole! :)

Marisa_Woo_2G

HI!

I just wanted to clarify how to determine covalent and ionic character. If the compound is between a non-metal and non-metal, is the character more covalent? And if the compound is between a metal and non-metal, is the character more ionic?

Thanks so much!

Marisa_Woo_2G

The optimist sees the glass half full. The pessimist sees the glass half empty. The chemist sees the glass completely full, half with liquid and half with air. :)

Marisa_Woo_2G

More or less, the two equations refer to the same concept. "X" refers to a generic element (Element X: Cl, O, N, etc.) so the first equation would essentially be: Generic element in a gas-phase + added electrons --> Generic element in a gas phase with a negative charge The other equation r...

Marisa_Woo_2G

Furthermore, a higher electron affinity would mean that the element would like to pick up electrons to become more stable. If the element's electron configuration is more stable, there would be a lower electron affinity. You can see this in the equation for electron affinity: Electron affinity = Ene...

Marisa_Woo_2G

Hi everyone! I was a little confused on the impact of emittance versus absorption when an electron begins or returns to a certain energy level. What does it mean for an electron to return to the given n-value for a certain atomic spectra series? For example, would a Balmer series electron return or ...

Marisa_Woo_2G

Looks great! I would just add that these are the steps if the question asked you to find the limiting reactant. If the question asked for the theoretical yield (how much product forms if the reaction occurs perfectly), you would multiply the moles of the limiting reactant by the molar ratio from the...

CHEMISTRY COMMUNITY

Search found 24 matches

Equatorial Bond Angle

Re: Post All Chemistry Jokes Here

Re: Post All Chemistry Jokes Here

Re: Naming

Molecularity and Overall Rate Law Relationship [ENDORSED]

Re: Pre-equilibrium approach and steady-state approach

Re: Cell Diagram Conventions [ENDORSED]

Galvanic Cell Diagram Contents [ENDORSED]

Re: Gibbs Free Energy

Re: Degeneracy [ENDORSED]

Re: Problem 8.65

Re: titration types

Re: Determining Weak or Strong Bases/Acids

Equilibrium Concentration Units [ENDORSED]

Re: Equilibrium Constant vs Reaction Quotient [ENDORSED]

Anti-Bonding Orbitals Definition

Re: Cation vs Anion

Re: Post All Chemistry Jokes Here

Covalent and Ionic Character

Re: Post All Chemistry Jokes Here

Re: Electron Affinity

Re: Electron Affinity

Emittance versus Absorption in Atomic Spectra [ENDORSED]

Re: Steps for Limiting Reactant Problems