for #24, why can't we find the oxidation state of Fe by finding the nitrogen' formal charges while attached?
Thanks in advance!
Search found 34 matches
- Sat Dec 08, 2018 6:33 pm
- Forum: Administrative Questions and Class Announcements
- Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
- Replies: 118
- Views: 20769
- Wed Dec 05, 2018 11:43 pm
- Forum: Lewis Acids & Bases
- Topic: BaO a Lewis acid ?
- Replies: 3
- Views: 546
BaO a Lewis acid ?
Question 12.17 on the hw states BaO is a Lewis acid. How do we come to that conclusion? Is it because in the lewis structure O has 2 lone pairs of e- ? If so, then is it safe to say that even when we have a neutral molecule, if it has lone pairs we consider it a base that donates e-?
- Wed Dec 05, 2018 10:39 pm
- Forum: Amphoteric Compounds
- Topic: homework question 12.11
- Replies: 1
- Views: 203
homework question 12.11
The solutions manual doesn't specify, so I was wondering if when they list the acids and bases, they're listing the conjugate acid-base pairs as
"ACID conjugate base, BASE conjugate acid?"
"ACID conjugate base, BASE conjugate acid?"
- Wed Dec 05, 2018 3:24 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Calc pH
- Replies: 1
- Views: 228
Calc pH
I’m a bit confused as to if we need to know how to calculate the pH of a weak acid solution. I thought Professor Lavelle said we didn’t, but on the practice probs, box 12.1 is listed and that gives steps on how to find the pH of weak acid solution. Also, exactly what calculations from chapter 12 mus...
- Sun Dec 02, 2018 8:06 pm
- Forum: Lewis Acids & Bases
- Topic: 6th editions Fundamentals J #1
- Replies: 3
- Views: 366
6th editions Fundamentals J #1
can anyone explain why in part d. H2SO3 is an acid? and why in part e. Ca(OH)2 is a base? Thanks in advance.
- Sun Dec 02, 2018 4:50 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordination Number
- Replies: 10
- Views: 890
Re: Coordination Number
Earlier today someone some one told me that the coordination number was the number of DIFFERENT bonds which threw me off. But what I'm seeing here is that when we have 3 of the SAME atoms bound to a central atom, the coordination # is still 3, right?
- Sun Dec 02, 2018 4:46 pm
- Forum: *Molecular Orbital Theory Applied To Transition Metals
- Topic: Transition Metals
- Replies: 5
- Views: 1767
Re: Transition Metals
this is what if found online lol "Transition metals can have multiple oxidation states because of their electrons. The transition metals have several electrons with similar energies, so one or all of them can be removed, depending the circumstances. This results in different oxidation states.&q...
- Sun Dec 02, 2018 4:43 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular shape in relation to polarity and boiling point
- Replies: 5
- Views: 2407
Re: Molecular shape in relation to polarity and boiling point
I believe that if the molecule is polar then it has a higher boiling point than something that is non-polar. But when comparing 2 polar molecules' boiling points it is important to recognize what forces are present (hydrogen bonding, LFD, Dipole-dipole) and the one with more forces present has a hig...
- Sun Nov 25, 2018 6:05 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 6th edition 4.13
- Replies: 3
- Views: 401
Re: 6th edition 4.13
I have a question on part d for this problem. I drew the Lewis structure and placed two lone pairs on the O so that all atoms would have a formal charge of 0. As a result I thought the molecular shape would be bent do the repelling of the lone pairs; however, the solution manual says it’s linear. Wh...
- Sat Nov 24, 2018 7:29 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Formal charge on atom w/ expanded valence shell
- Replies: 1
- Views: 741
Formal charge on atom w/ expanded valence shell
If we have for example XeF4 (ch. 3.65 6th ed), the formal charge on Xe is zero; however, when we’re looking at the bond pairs and lone pairs there’s 12 electrons around the Xe. Will the charge for atoms w expanded valence shells always be 0?
- Tue Nov 20, 2018 12:31 pm
- Forum: Student Social/Study Group
- Topic: Lavelle office hours (week of thanksgiving break)
- Replies: 1
- Views: 290
Lavelle office hours (week of thanksgiving break)
Will Lavelle still have O.H. this Wednesday even though we don’t have class? Or are O.H. Cancelled too?
- Sun Nov 18, 2018 11:00 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: AXE formula
- Replies: 32
- Views: 12048
Re: AXE formula
Enzo_1I wrote:From what i understand it is necessary to know the shape that corresponds to the formula. This means memorizing which formulas are associated to which shape.
do you happen to know if theres anyway to know the corresponding shape aside form the AXE formula? or must we memorize those too?
- Sun Nov 18, 2018 10:57 pm
- Forum: *Liquid Structure (Viscosity, Surface Tension, Liquid Crystals, Ionic Liquids)
- Topic: Shape and Boiling Point
- Replies: 12
- Views: 3013
Re: Shape and Boiling Point
What is the relationship between shape and boiling point? Like I know if it's rod-shaped there's a stronger interaction because of the larger distance, but what does that have to do with its higher boiling point? the way I think of it is that when 2 rod shape molecules interact the shape allows the...
- Sun Nov 18, 2018 10:47 pm
- Forum: Resonance Structures
- Topic: Bond Lengths
- Replies: 6
- Views: 894
Re: Bond Lengths
when we draw all possible resonance structures are we required to draw the hybrid with the dashed lines? or is it okay to draw the double headed arrow between the different resonance structures?
- Sat Nov 10, 2018 6:08 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Naming the shape
- Replies: 6
- Views: 622
Re: Naming the shape
in class when Lavelle showed us the tetrahedral, why couldn't we put a bond at the bottom? how does putting the last bond pointing toward us affect the atom?
- Sat Nov 10, 2018 5:59 pm
- Forum: Lewis Structures
- Topic: polyatomic ions
- Replies: 2
- Views: 395
polyatomic ions
how exactly do we draw these? do we add/ subtract valence electrons (based on the charge given in the chemical formula), and just add a bracket and charge? or is there something else we must do?
- Sat Nov 10, 2018 5:55 pm
- Forum: Resonance Structures
- Topic: Bond Lengths
- Replies: 6
- Views: 894
Re: Bond Lengths
Does the bond length change depending on where the double bond is in the resonance structures?
- Sun Nov 04, 2018 12:35 pm
- Forum: Lewis Structures
- Topic: 3.39
- Replies: 1
- Views: 267
3.39
Should we know what the chemical formula of a compound is just by looking at the name? For example knowing that potassium phosphate is K3PO4 (chapter 3 #29 6th edition?)
- Sat Nov 03, 2018 5:40 pm
- Forum: *Particle in a Box
- Topic: Midterm
- Replies: 17
- Views: 4150
Re: Midterm
WHERE IS LAST YEARS MIDTERM?...
- Sat Nov 03, 2018 5:38 pm
- Forum: Trends in The Periodic Table
- Topic: Electron Affinity
- Replies: 5
- Views: 565
Re: Electron Affinity
Can someone explain why C has a higher electron affinity than N in more detail plz? It’s confusing having said that N is closer to the right of the periodic table...
- Sat Nov 03, 2018 1:42 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Ground state
- Replies: 2
- Views: 280
Re: Ground state
Yeah I have a follow up question...looking at 2.39 6th edition, how can we tell if an electron configuration is in ground state or excited state?
- Sat Nov 03, 2018 1:33 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: degeneracy of the a 4p orbital
- Replies: 9
- Views: 2095
Re: degeneracy of the a 4p orbital
Since it’s 4p, we know p has 1 subshell (l=1), that subshell has 3 orbitals and all those orbitals will have the same energy level
- Sat Oct 27, 2018 9:08 pm
- Forum: Lewis Structures
- Topic: Electron Configuration
- Replies: 4
- Views: 463
Re: Electron Configuration
also, if I isn't specified its found by all the numbers until n-1
ex// If n=3 then I=0,1,2 (2 is the las one because n-1) and M subscript I= -I,i=I-1,I
ex// If n=3 then I=0,1,2 (2 is the las one because n-1) and M subscript I= -I,i=I-1,I
- Sat Oct 27, 2018 9:04 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: nodal planes for d-orbitals
- Replies: 3
- Views: 362
Re: nodal planes for d-orbitals
what exactly do the nodal planes help us figure out?
- Sat Oct 27, 2018 9:03 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm
- Replies: 11
- Views: 873
Re: Midterm
fundamentals till week 5 Friday, I believe.
- Sat Oct 20, 2018 6:26 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Series and Wavelengths
- Replies: 4
- Views: 370
Re: Series and Wavelengths
How exactly does the model demonstrate that though? For example, is going from The first line on the left to one on the right an increase in N or something?
- Sat Oct 20, 2018 1:49 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: energy difference vs. E subscript n
- Replies: 2
- Views: 1242
energy difference vs. E subscript n
are energy difference (delta E) & E subscript n used interchangeably? what exactly is E subscript n?
- Tue Oct 16, 2018 12:43 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Got my homework back no grade
- Replies: 1
- Views: 243
Got my homework back no grade
Hello,
I turned in hw #2 last week in discussion and got it back today, however there’s no score on it...so how do I determine my score?
I turned in hw #2 last week in discussion and got it back today, however there’s no score on it...so how do I determine my score?
- Fri Oct 12, 2018 7:22 pm
- Forum: Properties of Light
- Topic: problem 1. 9 sixth edition
- Replies: 4
- Views: 527
Re: problem 1. 9 sixth edition
can anybody explain the procedure for the 4th row ? plz I kept getting a couple digits off...
- Fri Oct 12, 2018 7:18 pm
- Forum: DeBroglie Equation
- Topic: Measurable wave length properties
- Replies: 3
- Views: 317
Measurable wave length properties
In the worked example presented in lecture today when asked if the car has any measurable wave like properties, what exactly helps determine if the answer is yes or no after finding the wavelength?
- Mon Oct 08, 2018 3:10 pm
- Forum: Empirical & Molecular Formulas
- Topic: Going from empirical to Molecular formula
- Replies: 14
- Views: 2099
Going from empirical to Molecular formula
When trying to find the molecular formula & we put the molar mass of molecular formula over the mass of the empirical formula we found, is the number supposed to be a whole # or can it be like 1.23? If it can be 1.23, do we round when we multiply it by the subscript of the elements in empirical ...
- Thu Oct 04, 2018 11:04 pm
- Forum: SI Units, Unit Conversions
- Topic: Scientific Notation
- Replies: 11
- Views: 1072
Re: Scientific Notation
Most of the final answers I’ve seen are in scientific notation so I was thinking we actually might have to
- Thu Oct 04, 2018 10:37 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: HW L1
- Replies: 3
- Views: 153
Re: HW L1
Hey i didn’t do that problem but I think u could check ur answer in the back of the book since it’s an odd #
- Wed Oct 03, 2018 1:47 pm
- Forum: Empirical & Molecular Formulas
- Topic: When to double moles
- Replies: 13
- Views: 986
Re: When to double moles
Yeah I believe if it’s off and multiplying it will make only make it off by less than .05 then that’s when you multiply it, but all 3 numbers have to be super close to a whole #