Search found 21 matches
- Thu Dec 07, 2017 11:09 pm
- Forum: Lewis Acids & Bases
- Topic: 12.17
- Replies: 2
- Views: 280
Re: 12.17
Basically, metal oxides react with water to form strong bases. Many nonmetal oxides react after to form acids. Amphoteric compounds are found between the metal oxides and the nonmetal oxides of the period table along the diagonal band of the metalloids. These amphoteric compounds will include Be, Al...
- Tue Dec 05, 2017 5:32 pm
- Forum: Properties & Structures of Inorganic & Organic Bases
- Topic: CH3COOH
- Replies: 3
- Views: 943
Re: CH3COOH
To add on, the acid will break down into H+ and CH3COO-. I don't think the other H+'s can be donated since they are part of the acetate ion, CH3COO-
- Tue Dec 05, 2017 5:25 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Shape of [Co(en)2(Br)2]
- Replies: 1
- Views: 367
Re: Shape of [Co(en)2(Br)2]
This is because a single (en) is a bidentate, so it attaches to the central atom at two separate place.
Also the coordination number would be 6. Both (en)'s have two attachment sites and each Br has 1, so 4+2=6 for the coordination number and an octahedral shape.
Also the coordination number would be 6. Both (en)'s have two attachment sites and each Br has 1, so 4+2=6 for the coordination number and an octahedral shape.
- Tue Nov 28, 2017 9:46 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Units for K and Q [ENDORSED]
- Replies: 5
- Views: 917
Re: Units for K and Q [ENDORSED]
For Kc and when comparing it with Q, the values to calculate must be in mol/L since Kc is the equilibrium constant based off of concentration.
- Tue Nov 28, 2017 9:27 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Reaction constant
- Replies: 4
- Views: 488
Re: Reaction constant
Generally, Kc is used for (aq) and Kp is used for gases.
- Tue Nov 21, 2017 1:08 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Constant Calculation
- Replies: 2
- Views: 236
Re: Constant Calculation
The equilibrium constant of a reaction is the inverse of the equilibrium constant of its reverse reaction and vice versa. For example, aA + bB <-> cC + dD K of original reaction= ([C]^c [D]^d) / [A]^a [B]^b cC + dD <-> aA + bB K of reverse reaction= ([A]^a [B]^b) / [C]^c [D]^d This equation is equiv...
Re: Diaqaua
Also, I would note that water is sometimes written as OH2 when in the brackets, because the oxygen of the water is what connects it to the central atom.
- Tue Nov 14, 2017 7:23 pm
- Forum: Ionic & Covalent Bonds
- Topic: different types of bonds
- Replies: 6
- Views: 518
Re: different types of bonds
Just to clarify, although CO2 is a nonpolar molecule, it contains polar bonds. This is because in an individual C-O bond, the dipole moment is not 0 and O is more electronegative. It is a non polar molecule, however because overall the dipole moments of both polar bonds cancel.
- Tue Nov 14, 2017 7:13 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 109.5 degrees
- Replies: 3
- Views: 354
Re: 109.5 degrees
Just to add, 109.5 degrees is only for tetrahedral molecules with no lone pairs!
- Wed Nov 08, 2017 10:07 am
- Forum: Lewis Structures
- Topic: When to use a double bond or triple bond [ENDORSED]
- Replies: 6
- Views: 18565
Re: When to use a double bond or triple bond [ENDORSED]
When I finish drawing my Lewis structure, I count the electrons to make sure it matches the number of electrons i should be using. If the number of electrons I used is higher and all the atoms have octets around them this generally means you should add a double or triple bond somewhere. Of course th...
- Wed Nov 08, 2017 9:57 am
- Forum: Lewis Structures
- Topic: Lewis Acids and Bases
- Replies: 2
- Views: 231
Re: Lewis Acids and Bases
A Lewis acid is an electron acceptor and a Lewis base is an electron donor. So the Lewis acid gives an electron to a Lewis base, which is why when the two bond together, they form coordinate covalent bonds.
I think Professor Lavelle said we would come back to this later in the class though.
I think Professor Lavelle said we would come back to this later in the class though.
- Thu Nov 02, 2017 4:06 pm
- Forum: Octet Exceptions
- Topic: F orbitals
- Replies: 4
- Views: 458
Re: F orbitals
Yes, you don't have to worry about the f orbitals until you reach lanthanum and all the elements after lanthanum
- Thu Nov 02, 2017 4:00 pm
- Forum: Lewis Structures
- Topic: electron configuration
- Replies: 6
- Views: 506
Re: electron configuration
The electron configuration is written in order of increasing n, even though that may not be the order that the shells are filled.
So the [Ar]3d^10 4s^2 4p^1 is the correct one
So the [Ar]3d^10 4s^2 4p^1 is the correct one
- Wed Oct 25, 2017 9:47 pm
- Forum: Trends in The Periodic Table
- Topic: f-orbitals
- Replies: 6
- Views: 3047
Re: f-orbitals
The f-orbital starts with element 57, since the f-block is the lanthanides and actinides. For example, the electron configuration of La (lanthanum) is [Xe] 5d^1 6s^2. The electron configuration for Hf (hafnium) is [Xe] 4f^14 5d^2 6s^2
Hope this helps!
Hope this helps!
- Wed Oct 25, 2017 9:13 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Subshell Qualities
- Replies: 2
- Views: 305
Re: Subshell Qualities
Effective nuclear charge refers to the "net nuclear charge after taking into account the shielding caused by other electrons in the atom," according to the textbook. So the more electrons, the smaller the effective nuclear charge. With more electrons in the atom, each individual electron f...
- Fri Oct 20, 2017 2:01 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Spin of parallel electrons
- Replies: 1
- Views: 347
Re: Spin of parallel electrons
For nitrogen in its ground state, all the arrows in the p orbital should be facing up. But if there were a few more electrons like in fluorine which has 9, then you would finish filling in the subshells with down arrows so that px and py have both an up facing and down facing arrow, while pz has one...
- Fri Oct 20, 2017 1:49 pm
- Forum: *Shrodinger Equation
- Topic: Electron Spin
- Replies: 6
- Views: 703
Re: Electron Spin
The spin helps distinguish which electron in a pair is spinning clockwise and which is spinning counterclockwise. Two electrons that are paired together will have the same n, l, and ml numbers but different ms/spins.
- Thu Oct 12, 2017 6:30 pm
- Forum: Properties of Light
- Topic: Wavelengths and Frequency of Electromagnetic Radiation [ENDORSED]
- Replies: 7
- Views: 685
Re: Wavelengths and Frequency of Electromagnetic Radiation [ENDORSED]
I think it would be helpful to know that ultraviolet light is next to visible light on the 400 nm side and infrared light is next to visible light on the 700 nm side.
- Thu Oct 12, 2017 5:54 pm
- Forum: Properties of Electrons
- Topic: Series
- Replies: 6
- Views: 602
Re: Series
My TA said we should at least know that visible light has wavelengths from about 400 nm to 700 nm.
- Fri Oct 06, 2017 2:14 pm
- Forum: Significant Figures
- Topic: Integers and Exact Numbers- Sig Figs [ENDORSED]
- Replies: 4
- Views: 561
Re: Intergers and Exact Numbers- Sig Figs [ENDORSED]
Just to add on, only base your sig figs off of values/measurments the problem gives you, not on conversion factors or any other numbers you introduce into the problem yourself.
- Thu Oct 05, 2017 9:22 pm
- Forum: Significant Figures
- Topic: 3 Sig Figs 1795.507? [ENDORSED]
- Replies: 5
- Views: 580
Re: 3 Sig Figs 1795.507? [ENDORSED]
If you're asking about 3 sig figs for the 1795.507, then it would be 1.80x10^3.