CHEMISTRY COMMUNITY

SamanthaGrohe1B

A strong base also donates [OH-] to the solution and increases the value of the pH.

SamanthaGrohe1B

I thought pKa and Ka was not material covered in the 14A final? Will we be tested on this as well?

SamanthaGrohe1B

It completely dissociates in water and increases the [H3O^+] concentration thus decreasing pH.

SamanthaGrohe1B

Square planar and tetrahedral are both molecular geometries that are observed within the tetrahedral electron configuration subdivision. It is tetrahedral that has 109.5 degree bond angles and a molecular shape that is composed of multiple planes as well as hybridization of sp^3 while square planar ...

SamanthaGrohe1B

Will biological function of coordination compounds and relating specific biological functions to given compounds be a focus on the final?

SamanthaGrohe1B

I assume that naming the coordination compounds is not necessary for this class

SamanthaGrohe1B

I am interested in what changed between the original to the modern convention of dipole arrow drawings that causes such a discrepancy in arrow configuration?

SamanthaGrohe1B

Hybridization of orbitals is usually greatly favored as this phenomena has lower energy compared to their separate counterparts. Since molecules and compounds form with the goal of attaining the lowest energy state of the interacting elements, it makes since that such an event occurs.

SamanthaGrohe1B

I believe that this is not the central focus of bond angles that Dr. Lavelle wants us to get out. A huge part of bond angles is the number of bonding pairs compared to the lone pairs of the molecule as the lone pairs have greater repulsive forces than bonding pairs and thus cause one of the most sub...

SamanthaGrohe1B

I don't believe you mean that it has a stronger bond but rather that it has the greater chance of dipole interactions or Van Der Waals forces between the atoms due to the extra charge of the atom. This can make a stronger interaction between the atoms or molecules of the compound.

SamanthaGrohe1B

Memorization of the electronegativity chart is not the most useful way to know the electronegativities. I would recommend remembering the basic trends and possible exception by knowing the number of valence electrons of each atom at ground state due to their electron configurations.

SamanthaGrohe1B

The 3-d molecular geometry of compounds has not been discussed in detail yet. I would just focus on the linearity of the compound at this point when observing interactions or Van Der Waals forces between compounds.

SamanthaGrohe1B

you should remember the trends but also keep in mind how not every element follows these trends perfectly as the organization of the periodic table does not perfectly account for all of the features of these elements.

SamanthaGrohe1B

there is no specific order needed when filling in the dots representing the outer unshared valence electrons of an element within a molecule or compound. the number of electrons per element is much more important that the order in which they are drawn in so just remember the octet rule and Hund's ru...

SamanthaGrohe1B

You can also observe the electronegativity trends of the periodic table with those elements that have the highest attraction for electrons being in the top right corner of the table and those elements that are the most likely to lose electrons within a bond being in the bottom left corner.

SamanthaGrohe1B

noble gases and other elements as ions like Cl- with full octets are more stable and less likely to react with other elements

SamanthaGrohe1B

knowing the basic trends of the periodic table is definitely helpful while memorization of such values would not help with a deeper understanding of the reasons why these trends exist. understanding the basic properties of the elements due to their electron configurations will be much more helpful f...

SamanthaGrohe1B

I agree that attending the office hours of your TA is very helpful. also, many questions or similar questions from the tests are found in the book or posted on Chemistry Community.

SamanthaGrohe1B

Does using a full arrow or half arrow indicate different properties of the electron configuration or is it just a matter of preference?

SamanthaGrohe1B

So for this question are we just supposed to assume that the photons of UV light contain enough energy to overcome the threshold energy of the electrons?

SamanthaGrohe1B

Electrons fill the orbital sub-shells singly first and then become paired after a single electron is present in each sub-shell of the orbital

SamanthaGrohe1B

Electrons fill the orbital sub-shells singly first and then become paired after a single electron is present in each sub-shell of the orbital

SamanthaGrohe1B

the energy has to be greater than or equal to the threshold energy or an electron will not be emitted. by having the energy of the photon be greater or equal to the energy of the electron this excess or equivalency of energy is converted to kinetic energy that is exhibited in the emitting of the ele...

SamanthaGrohe1B

you definitely needed to convert the value as it cannot be used in equations unless it is written in the standard SI units of meters for distance or length measurements and seconds for time measurements

SamanthaGrohe1B

the test is gonna cover concepts from Chapter 1 problems: 3,5,9,11,13,15,21,23,25,27,33,37,39,41 as stated in the recent email from Lavelle

SamanthaGrohe1B

I believe that at this point in the course, the order of the elements in the compound is not as important as having the correct relative quantities to each other and knowing the general chemical properties of the compound

SamanthaGrohe1B

I took AP Chemistry in high school my sophomore year. I also am having trouble refreshing all of the information. fortunately, I shaved all of my notes that we had to compile into a project for review for the AP test at the end of the year. looking back at those and reading all the recommended sessi...

SamanthaGrohe1B

within the text book periodic table and on our first in-discussion test I believe that 16.00 was used so I would stay safe and utilize this number

SamanthaGrohe1B

keep in mind the purpose or the key concept that the question is asking you to utilize. if it is a simple determination of the mass of the products produced by the reaction, stoichiometry can be utilized and the limiting reactant has to be determine. however, if the question is not focusing on that ...

SamanthaGrohe1B

I agree, usually the question will specify the units to convert to or start your conversions with.

SamanthaGrohe1B

during AP Chem in high school, we were recommended to round to the smallest number of sigfigs presented in the question

CHEMISTRY COMMUNITY

Search found 31 matches

Re: basicity strength

Re: pKa [ENDORSED]

Re: Strong Acid

Re: Tetrahedral and Square planar

Re: Biological Function

Re: Final

Re: Correct Dipole Depiction

Re: Hybrid Orbitals

Re: Bond Angles

Re: Bond Strength

Re: electronegativity chart

Re: How to determine molecular shape

Re: Trends? [ENDORSED]

Re: Order of Dots

Re: KCl Lewis formula

Re: Stability of Cl vs Cl-

Re: Memorization of Electronegativity

Re: Test 1

Re: How to properly format your answers

Re: Test 2 final question [ENDORSED]

Re: Unpaired Electrons [ENDORSED]

Re: Unpaired Electrons [ENDORSED]

Re: Photoelectric Effect

Re: DeBrogile Module

Re: test 2

Re: Compound Order

Re: Rusty on High School Chem [ENDORSED]

Re: Which mass of oxygen should be used? [ENDORSED]

Re: Knowing if it's Limiting Reactions

Re: Length Units

Re: Rounding: when and where?