Search found 20 matches
- Fri Dec 08, 2017 1:14 am
- Forum: Lewis Acids & Bases
- Topic: What tables should we know from the book?
- Replies: 4
- Views: 678
Re: What tables should we know from the book?
I think you should memorize important strong acids and strong bases that are listed in the book.
- Fri Dec 08, 2017 1:12 am
- Forum: Conjugate Acids & Bases
- Topic: Conjugate of CH3OOH [ENDORSED]
- Replies: 2
- Views: 711
Conjugate of CH3OOH [ENDORSED]
When you are asked for the conjugate base of lets say CH3OOH why is the Hydrogen at the end removed first and not the one of the Hydrogens at the beginning?
- Sat Dec 02, 2017 1:47 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Chem. Equilibrium Part 2 Post-Module Assess. #26 [ENDORSED]
- Replies: 2
- Views: 623
Re: Chem. Equilibrium Part 2 Post-Module Assess. #26 [ENDORSED]
The correct answer is 0.175 or 0.18 as stated above, so the answer is A not B as stated above by mistake
- Sat Dec 02, 2017 1:30 pm
- Forum: Naming
- Topic: Oxidation State [ENDORSED]
- Replies: 2
- Views: 430
Re: Oxidation State [ENDORSED]
How I find the oxidation state of a coordination compound and set up an equation. First I acknowledge what charges the ligands each have and multiply them with how many type that type of ligand there is. I then add these two numbers up. After I assign the metal the variable (x) and add it to the lig...
- Mon Nov 27, 2017 11:02 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: problem11.23
- Replies: 2
- Views: 406
Re: problem11.23
As stated above 500K is the temperature in Kelvin and it affects the problem in some cases because the equilibrium constant will be different at a different temperature.
- Mon Nov 27, 2017 10:57 am
- Forum: Ideal Gases
- Topic: Problem 11.37 [ENDORSED]
- Replies: 3
- Views: 658
Re: Problem 11.37 [ENDORSED]
The information for this question is on pages 439-440. Basically for (a) it is the reverse reaction so it is just the inverse of the forward reaction. For (b) and (c) you raise the equilibrium constant (K=41) to the number by which the reaction was multiplied. So in example since in part (b) it is m...
- Sat Nov 18, 2017 10:42 am
- Forum: Hybridization
- Topic: Hybrid Orbitals 4.31
- Replies: 2
- Views: 466
Re: Hybrid Orbitals 4.31
Lone pairs count as a region of electron density
2 regions of electron density = sp
3 regions = sp^2
4 regions = sp^3
5 regions = sp^3d
6 regions = sp^3d^2
2 regions of electron density = sp
3 regions = sp^2
4 regions = sp^3
5 regions = sp^3d
6 regions = sp^3d^2
- Sat Nov 18, 2017 10:37 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 4.25 lewis structure
- Replies: 4
- Views: 591
Re: 4.25 lewis structure
^ 4.25A would be polar because although the 2D illustration looks like the charges would cancel out if you view the 3D model of a Tetrahedral shape they do not.
- Sat Nov 11, 2017 2:33 pm
- Forum: Ionic & Covalent Bonds
- Topic: Valence of an Atom [ENDORSED]
- Replies: 3
- Views: 526
Re: Valence of an Atom [ENDORSED]
I think what Dr. Lavelle was trying to explain is that in the beginning you add up the number of valence electrons your structure should have so that at the end you are able to double check that you have the correct amount.
- Sat Nov 11, 2017 2:22 pm
- Forum: Electronegativity
- Topic: Electronegativity [ENDORSED]
- Replies: 5
- Views: 728
Re: Electronegativity [ENDORSED]
Fluorine is the most electronegative element because it has 5 electrons in its 2P shell. Since is so close to noble gas configuration the electrons are held very close to the nucleus and its desire to gain an electron is very high.
- Sat Nov 04, 2017 4:40 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Order of Orbitals
- Replies: 10
- Views: 2531
Re: Order of Orbitals
Technically it isn't incorrect to write it in that order, but Dr. Lavelle prefers you put them in order of increasing energy. It makes writing electron configuration for ions easier because the last orbital is the one that loses or gains electrons first and it goes backwards from there.
- Sat Nov 04, 2017 4:34 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: d and s blocks
- Replies: 16
- Views: 2066
Re: d and s blocks
The energy levels go as following (lowest to highest): f, d, s, and p. F is (n-2) and d is (n-1).
- Sat Oct 28, 2017 12:29 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Difference Between Orbitals and Subshells [ENDORSED]
- Replies: 7
- Views: 1794
Difference Between Orbitals and Subshells [ENDORSED]
Can someone please clarify which variables are the orbitals and which are the subshells, I am a bit confused.
- Sat Oct 28, 2017 12:16 pm
- Forum: Hybridization
- Topic: Principle Quantum Number in D-Block [ENDORSED]
- Replies: 4
- Views: 1028
Principle Quantum Number in D-Block [ENDORSED]
Why does the principle quantum number drop down by one when you reach the D-block?
- Sun Oct 22, 2017 1:28 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Quantum Numbers [ENDORSED]
- Replies: 1
- Views: 363
Quantum Numbers [ENDORSED]
Where would I be able to find the quantum number based on the information given on blank periodic table?
- Sun Oct 22, 2017 1:05 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: ORBITALS, SHELLS ETC. [ENDORSED]
- Replies: 6
- Views: 888
Re: ORBITALS, SHELLS ETC. [ENDORSED]
I'm pretty sure he gives us a periodic table, but you should try and master electron configuration and the 2 rules we learned in class.
- Sun Oct 15, 2017 5:30 pm
- Forum: Properties of Light
- Topic: Converting Units [ENDORSED]
- Replies: 11
- Views: 1372
Re: Converting Units [ENDORSED]
If it was converting units such as m^3 to cm^3 then you should convert all units at the beginning but if its converting units where you simply move a decimal such as nm to pm then do it at the end.
- Sun Oct 15, 2017 5:16 pm
- Forum: Properties of Light
- Topic: Question about speed of light rounding
- Replies: 4
- Views: 607
Question about speed of light rounding
In problem 1.15 why did they round the speed of light (2.998 x 10^8) but in problem 1.17 they didn't (2.99792 x 10^8)?
- Fri Oct 06, 2017 10:20 pm
- Forum: Balancing Chemical Reactions
- Topic: Net Moles Produced [ENDORSED]
- Replies: 5
- Views: 858
Net Moles Produced [ENDORSED]
What does it mean when it asks for net number of moles produced?
- Fri Oct 06, 2017 10:05 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Rounding Rule for 5
- Replies: 5
- Views: 1084
Re: Rounding Rule for 5
I would say that the rounding error that would occur would be very minimal but if you want to avoid significant errors over many calculations round significant figures at your final answer only.