Search found 20 matches
- Sat Dec 09, 2017 6:39 pm
- Forum: Naming
- Topic: Identifying Ligands
- Replies: 1
- Views: 405
Re: Identifying Ligands
Yes. I lost a mark on my last test for this.
- Fri Dec 08, 2017 3:17 pm
- Forum: Lewis Structures
- Topic: Octet vs Formal Charge
- Replies: 2
- Views: 460
Re: Octet vs Formal Charge
Generally, a lower formal charge indicates a more stable molecule, so a structure which gives a lower formal charge would be preferred but if you have molecules with atoms from group 1 and 2, they cant have an expanded octet and need to obey the octet rule, so a formal charge that is not zero is oka...
- Fri Dec 08, 2017 3:03 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: effects on partial pressure
- Replies: 2
- Views: 560
Re: effects on partial pressure
Increasing the temperature would increase the total pressure of the system and vice versa- since the total pressure is just a sum of all combined partial pressures I would assume that both partial and total pressures increase. Volume varies inversely with pressure and a decrease in volume would mean...
- Thu Dec 07, 2017 2:27 pm
- Forum: Lewis Acids & Bases
- Topic: Bronsted vs. Lewis
- Replies: 6
- Views: 946
Re: Bronsted vs. Lewis
Bronsted and Lewis are just different definitions for the same thing i.e. either an acid or a base. Bronsted defines it in terms of being either H+ proton donors or acceptors while Lewis defines it in terms of being electron acceptors or donors.
- Thu Dec 07, 2017 2:22 pm
- Forum: Naming
- Topic: Oxidation Numbers and how to get them
- Replies: 4
- Views: 652
Re: Oxidation Numbers and how to get them
Equate the sum of the charge of each ligand and x to be equal to the charge on the complex ion where x is the oxidation no. of the central metal atom. Solve for x.
- Mon Nov 27, 2017 6:21 pm
- Forum: Biological Examples
- Topic: Lewis Acid/Base?
- Replies: 2
- Views: 417
Re: Lewis Acid/Base?
A lewis acid can be considered the H+ ion so it accepts an electron pair. A lewis base is OH- so it donates the electrons.
- Sat Nov 25, 2017 6:28 pm
- Forum: Ideal Gases
- Topic: Units of Partial Pressure
- Replies: 7
- Views: 970
Re: Units of Partial Pressure
Since we use SI units, I would think Pascals.
Re: Thio- ?
yes, the ligands bond to the central metal atom.
Re: Thio- ?
Thio is used when an oxygen atom in the compound has been replaced by a sulfur atom. N or S is underlined depending on when it is the atom that 'links' to the compound, for eg O in H2O could be underlined to show that it is the one linking.
- Fri Nov 24, 2017 5:10 pm
- Forum: Naming
- Topic: Polydentate
- Replies: 3
- Views: 455
Re: Polydentate
polydentate ligands are ligands that have multiple bonding sites. Carbonate is monodentate, because it has 120 degrees between its oxygens so both don't bind to the same metal. But sometimes, carbonate bonds to two different metals, making it bidentate.
- Tue Nov 14, 2017 4:04 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Radicals and Their Shape
- Replies: 4
- Views: 917
Re: Radicals and Their Shape
Lone pairs take up more space on the molecule than bonding pair electrons because they face a lot of repulsion from neighbouring lone pairs and bonding pairs so they usually cause the molecule to have a bent/angular shape.
- Wed Nov 08, 2017 9:35 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Video Modules and Pre Assessments
- Replies: 1
- Views: 392
Video Modules and Pre Assessments
No modules for Chapter 3 exist?
- Sun Nov 05, 2017 4:25 pm
- Forum: Trends in The Periodic Table
- Topic: Electron Affinity
- Replies: 4
- Views: 630
Re: Electron Affinity
What's the relationship between electron affinity and electronegativity?
- Sat Nov 04, 2017 8:46 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm Review [ENDORSED]
- Replies: 4
- Views: 733
Re: Midterm Review [ENDORSED]
Is it still useful to attend the review sessions if you don't have any questions to ask? Or are they only for discussing problems?
- Sat Oct 28, 2017 7:16 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Nov 9th Midterm
- Replies: 1
- Views: 378
Nov 9th Midterm
When will the location for the Chem Midterm be posted?
- Wed Oct 25, 2017 12:12 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configuration writing
- Replies: 8
- Views: 818
Re: Electron Configuration writing
Also, when doing problems is everyone writing it like Professor Lavelle did it in class, i.e. for example px1 py1 (where x and y are subscripts) or just p2?
- Sun Oct 22, 2017 10:11 pm
- Forum: Student Social/Study Group
- Topic: De Neve Study Group
- Replies: 2
- Views: 618
De Neve Study Group
Any people taking Chem14A in De Neve or nearby who want to help each other out?
- Sun Oct 22, 2017 10:09 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Homework [ENDORSED]
- Replies: 1
- Views: 303
Homework [ENDORSED]
Have homework points been uploaded on MyUCLA?
- Sat Oct 07, 2017 6:48 pm
- Forum: Empirical & Molecular Formulas
- Topic: Friday Oct 6 Test
- Replies: 7
- Views: 1114
Re: Friday Oct 6 Test
What was the correct answer for the identity of Compound X?
- Sat Oct 07, 2017 6:45 pm
- Forum: Significant Figures
- Topic: All students read this sig fig post [ENDORSED]
- Replies: 170
- Views: 33557
Re: All students read this sig fig post [ENDORSED]
What was the penalty for wrong significant figures on the test last Friday (10/06/17)?