Search found 31 matches
- Tue Jul 30, 2019 7:34 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Jonathan's Review
- Replies: 2
- Views: 494
Re: Jonathan's Review
Will the answers be posted? :(
- Tue Jul 30, 2019 7:13 pm
- Forum: Ionic & Covalent Bonds
- Topic: Test 2 problem
- Replies: 2
- Views: 475
Re: Test 2 problem
so to be the most ionic, the electronegativity difference between the two bonded atoms should be the greatest. so we should choose the most electronegative element, which is F in the top right corner, and the least electronegative atom, which is Fr in the bottom left corner, to form the most ionic c...
- Tue Jul 30, 2019 7:09 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Shape in coordination compound
- Replies: 2
- Views: 508
Re: Shape in coordination compound
I think we can check how many binding sites are there in total to determine the shape. here there is 3 C2O4, each C2O4 has 2, since it is a bidentate, so a total of 6 bindings sites. and this is similar to electron density regions, so the shape is octahedral
- Tue Jul 30, 2019 4:57 pm
- Forum: Identifying Acidic & Basic Salts
- Topic: final review Fe(OH2)6 3+???
- Replies: 1
- Views: 420
final review Fe(OH2)6 3+???
in the review practice question, one of answer was like this i. Fe(OH2) 63 +( aq) + H2O (l) = Fe(OH2) 5( OH)2 +(aq) + H3O + ( aq) ii. Fe(OH2) 5( OH)2 +(aq) + H2O (l) = Fe(OH2) 4( OH)2+ ( aq) + H3O + (aq) iii. Fe(OH2) 4( OH)2 + (aq) + H2O (l) = Fe(OH2) ...
- Tue Jul 30, 2019 2:50 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Chem 14A Practice Final Answer Key
- Replies: 1
- Views: 479
Re: Chem 14A Practice Final Answer Key
Thank you so much!
- Tue Jul 30, 2019 2:50 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionic vs covalent
- Replies: 8
- Views: 890
Re: Ionic vs covalent
if the electronegativity difference is greater than 2, it has ionic bond if the electronegativity difference is less than 1.5, it has covalent bond How would we go about calculating electronegativity? there is an electronegativity chart if you google it, but we don't have to memorize all of them. b...
- Tue Jul 30, 2019 2:46 pm
- Forum: Dipole Moments
- Topic: Effect of size [ENDORSED]
- Replies: 7
- Views: 1447
Re: Effect of size [ENDORSED]
I think the London forces gets higher when there are more electrons, since there is a bigger electron cloud to be induced
- Mon Jul 29, 2019 2:47 pm
- Forum: Ionic & Covalent Bonds
- Topic: Ionic vs covalent
- Replies: 8
- Views: 890
Re: Ionic vs covalent
if the electronegativity difference is greater than 2, it has ionic bond
if the electronegativity difference is less than 1.5, it has covalent bond
if the electronegativity difference is less than 1.5, it has covalent bond
- Sun Jul 28, 2019 9:20 pm
- Forum: Amphoteric Compounds
- Topic: acidic oxide [ENDORSED]
- Replies: 3
- Views: 1012
Re: acidic oxide [ENDORSED]
non-metal oxides are acidic, such as SO2, because they react with water to produce corresponding acids.
SO2 react with H2O to produce H2SO4
SO2 react with H2O to produce H2SO4
- Sun Jul 28, 2019 9:11 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: How to tell?
- Replies: 11
- Views: 967
Re: How to tell?
bronsted acid usually has an H in it, like HCl, H2SO4, since it can donate H+
bronsted base usually has an OH in it, like NaOH and KOH, so it can accept the H+ from acid to form H2O.
bronsted base usually has an OH in it, like NaOH and KOH, so it can accept the H+ from acid to form H2O.
- Fri Jul 26, 2019 3:39 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligand bonds
- Replies: 1
- Views: 428
Re: Ligand bonds
I think all the polydentate are marked in the book on this table, apart from them, all other mono dentate have one binding site only.
- Fri Jul 26, 2019 3:36 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Naming coordination compounds
- Replies: 3
- Views: 532
Re: Naming coordination compounds
yes I think so. it's better to remember all the ligands appeared on the book
- Fri Jul 26, 2019 3:33 pm
- Forum: General Science Questions
- Topic: Final Material
- Replies: 3
- Views: 825
Re: Final Material
No, only material after the midterm is going to be tested
- Fri Jul 26, 2019 3:31 pm
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: H-bonds [ENDORSED]
- Replies: 5
- Views: 892
Re: H-bonds [ENDORSED]
because they are formed with the 3 most electronegative atoms F N and O. they attract the electron density the most.
- Wed Jul 24, 2019 10:54 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: homework 9C7 7th edition
- Replies: 2
- Views: 522
homework 9C7 7th edition
Can someone explain this question to me? why can't (c) be a chelating ligand?
- Wed Jul 24, 2019 10:42 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3966517
Re: Post All Chemistry Jokes Here
Even FaceApp can't make this plastic bottle age well. Only recycling can do that.
- Wed Jul 24, 2019 10:40 pm
- Forum: Naming
- Topic: homework 9C1 (c)
- Replies: 1
- Views: 399
Re: homework 9C1 (c)
ah I got it now. no problem now
- Wed Jul 24, 2019 10:29 pm
- Forum: Naming
- Topic: homework 9C1 (c)
- Replies: 1
- Views: 399
homework 9C1 (c)
how to name [Co(CN)5(OH2)]2- ????
- Wed Jul 24, 2019 10:16 pm
- Forum: Hybridization
- Topic: homework 2.45 7th edition
- Replies: 1
- Views: 410
homework 2.45 7th edition
2.45 Consider the bonding in H2CPCHCHO. (a) Draw the most important Lewis structure. Include all nonzero formal charges. (b) Identify the composition of the bonds and the hybridization of each lone pair—for example, by writing s(H1s,C2sp2). I know question (a) but for question (b) can someone explai...
- Wed Jul 24, 2019 8:12 pm
- Forum: *Molecular Orbital Theory Applied To Transition Metals
- Topic: naming sequence
- Replies: 4
- Views: 1098
Re: naming sequence
so we name the ligand first, then the transition metal cation (with its oxidation state as Roman numeral), then the anions In the ligand naming, we name it in the alphabetical order. for [Co(NH3)5Cl]Cl, amine starts with a, chlorine starts with c, so we name amine first. so it's pentaaminechlorocoba...
- Wed Jul 24, 2019 8:04 pm
- Forum: Conjugate Acids & Bases
- Topic: J.15 6th Edition
- Replies: 1
- Views: 740
Re: J.15 6th Edition
so NaC6H5O dissociate into cation Na+ and C6H5O-, then the Na+ forms NaOH with the OH- from water and C6H5O- from C6H6O with H+ from water. NaC6H5O + H2O = NaOH + C6H6O
- Wed Jul 24, 2019 7:59 pm
- Forum: *Molecular Orbital Theory Applied To Transition Metals
- Topic: final exam
- Replies: 5
- Views: 1114
Re: final exam
I don't think so....
- Wed Jul 24, 2019 7:57 pm
- Forum: Bronsted Acids & Bases
- Topic: Fundamentals J.7(c) (6th ed)
- Replies: 2
- Views: 580
Re: Fundamentals J.7(c) (6th ed)
I think it can, but requires high energy/ high temperature to react. I googled it. it needs about 700 degree Celsius to react.
CaO + 2HCN → CaCN2 + CO + H2
CaO + 2HCN → CaCN2 + CO + H2
- Tue Jul 23, 2019 3:45 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3966517
Re: Post All Chemistry Jokes Here
Two chemists walk into a bar
The first chemist says I'll have some H2O. The second says I'll have some H2O too. The second one dies shortly after.
The first chemist says I'll have some H2O. The second says I'll have some H2O too. The second one dies shortly after.
- Tue Jul 23, 2019 3:27 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3966517
Re: Post All Chemistry Jokes Here
What can you make when you have 6.022x10^23 avocados?
Guacamole, because you gotta follow Avocado’s Law.
Guacamole, because you gotta follow Avocado’s Law.
- Tue Jul 23, 2019 3:26 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3966517
- Tue Jul 23, 2019 3:18 pm
- Forum: Octet Exceptions
- Topic: Lewis Acids and Bases
- Replies: 10
- Views: 1381
Re: Lewis Acids and Bases
Lewis acids are electron pair acceptor. Lewis bases are electron pair donor.
- Tue Jul 23, 2019 3:16 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Why is AX3E2 linear?
- Replies: 8
- Views: 1477
Re: Why is AX3E2 linear?
AX3E2 is T shaped. There are 5 electron densities regions, so we can see consider it as trigonal pyramidal with 2 bonding pair changed into lone pair. Changing the pairs on the trigonal planar is more stable, hence resulting the T-shaped. I think this picture shows the shape clearly.
- Tue Jul 23, 2019 3:05 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3966517
Re: Post All Chemistry Jokes Here
This is really cute!! (More of a biology joke though
- Tue Jul 09, 2019 9:07 pm
- Forum: Administrative Questions and Class Announcements
- Topic: homework this week?
- Replies: 1
- Views: 345
homework this week?
Since this is the midterm week, I just wondering if there is still homework due this week?
If there is, still due on Thursday July 11?
If there is, still due on Thursday July 11?
- Tue Jul 02, 2019 10:14 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: 7th edition 1A.15
- Replies: 1
- Views: 517
7th edition 1A.15
sorry can someone explain how to do this question? I don't really know where to begin. 1A.15 In the ultraviolet spectrum of atomic hydrogen, a line is observed at 102.6 nm. Determine the values of n for the initial and final energy levels of the electron during the emission of energy that leads to t...