Search found 53 matches
- Sun Dec 08, 2019 12:32 am
- Forum: Polyprotic Acids & Bases
- Topic: HCLO4 vs. H3PO4
- Replies: 4
- Views: 515
HCLO4 vs. H3PO4
Which is the stronger acid and why
- Sat Dec 07, 2019 4:46 pm
- Forum: Biological Examples
- Topic: Marshmallow Review #22
- Replies: 1
- Views: 160
Marshmallow Review #22
The amino acid histidine binds to the heme complex iron to form myoglobin. How many O2 molecules can myoglobin bind? How many myoglobins form a hemoglobin
- Sat Dec 07, 2019 1:11 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Chelating ligands
- Replies: 1
- Views: 149
Chelating ligands
Can someone explain what determines if a ligand is cheating or not. I’m still confused.
- Wed Dec 04, 2019 11:51 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: Ice tables
- Replies: 3
- Views: 211
Ice tables
Did Dr. Lavelle mention that we don’t have to review ICE tables for the final exam?
- Tue Dec 03, 2019 6:46 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: 6B.3 (b)
- Replies: 3
- Views: 295
6B.3 (b)
A careless laboratory technician wants to prepare 200.0 mL of a 0.025 m HCl(aq) solution but uses a volumetric flask of vol- ume 250.0 mL by mistake. (a) What would the pH of the desired solution have been? (b) What will be the actual pH of the solution as prepared?
- Sat Nov 30, 2019 11:50 pm
- Forum: Amphoteric Compounds
- Topic: 6A.17
- Replies: 3
- Views: 220
6A.17
State whether the following oxides are acidic, basic, or amphoteric:
(a) BaO
(b) SO3
(c) As2O3
(d) Bi2O3
(a) BaO
(b) SO3
(c) As2O3
(d) Bi2O3
- Sat Nov 30, 2019 11:45 pm
- Forum: Bronsted Acids & Bases
- Topic: 6A.11
- Replies: 2
- Views: 231
6A.11
Write the chemical equations of the two proton transfer equilibria that demonstrate the amphiprotic character of
(a) HCO3-
(b) HPO42-
Identify the conjugate acid-base pairs in each case
(a) HCO3-
(b) HPO42-
Identify the conjugate acid-base pairs in each case
- Sat Nov 30, 2019 5:46 pm
- Forum: Student Social/Study Group
- Topic: Final Exam
- Replies: 3
- Views: 193
Re: Final Exam
Also, how many questions is the final going to be?
- Sat Nov 30, 2019 3:00 pm
- Forum: Student Social/Study Group
- Topic: Final
- Replies: 2
- Views: 236
Final
When will we be done covering topics for the final in lecture?
- Sat Nov 30, 2019 2:56 pm
- Forum: Student Social/Study Group
- Topic: Final Exam
- Replies: 3
- Views: 193
Final Exam
When is the final exam and how long is it supposed to be?
- Sun Nov 24, 2019 6:39 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: 9C.9
- Replies: 1
- Views: 121
9C.9
With the help of Table 9C.1, determine the coordination number of the metal ion in each of the following complexes:
(a) [NiCl4]2–
(b) [Ag(NH3)2]+
(c) [PtCl2(en)2]2+
(d) [Cr(edta)]-
(a) [NiCl4]2–
(b) [Ag(NH3)2]+
(c) [PtCl2(en)2]2+
(d) [Cr(edta)]-
9C.1
Name each of the following complex ions and identify the oxidation number of the metal:
(a) [Fe(CN)6]4-; (b) [Co(NH3)6]3+;(c) [Co(CN)5(OH2)]2-; (d) [Co(NH3)5(SO4)]+.
(a) [Fe(CN)6]4-; (b) [Co(NH3)6]3+;(c) [Co(CN)5(OH2)]2-; (d) [Co(NH3)5(SO4)]+.
- Thu Nov 21, 2019 12:32 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: dipole-dipole in a solid phase vs gas phase
- Replies: 15
- Views: 1192
dipole-dipole in a solid phase vs gas phase
Which interaction is stronger? Dipole-dipole in the solid phase or dipole-dipole in the gas phase?
- Thu Nov 21, 2019 12:27 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: dipole-dipole vs induced dipole
- Replies: 9
- Views: 589
dipole-dipole vs induced dipole
What exactly is an induced dipole and what is the difference between an induced dipole and dipole-dipole?
- Wed Nov 20, 2019 6:36 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: HCL vs NaCl
- Replies: 6
- Views: 1022
HCL vs NaCl
Can somebody please explain why NaCl has a higher melting point than HCl
- Sun Nov 17, 2019 11:28 pm
- Forum: Bond Lengths & Energies
- Topic: Test 2 Topics
- Replies: 40
- Views: 2210
Re: Test 2 Topics
All of 2E and 2F. Some concepts from 2D
- Sun Nov 17, 2019 8:23 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Terminal Atom
- Replies: 2
- Views: 222
Terminal Atom
What is a terminal atom?
- Sun Nov 17, 2019 5:10 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: (CH3)2Be
- Replies: 1
- Views: 165
(CH3)2Be
What is the bond angle for the central atom of (CH3)2Be?
- Sun Nov 17, 2019 2:33 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 2E.1
- Replies: 1
- Views: 161
2E.1
Below are ball-and-stick models of two molecules. In each case, indicate whether there must be, maybe, or cannot be one or more lone pairs of electrons on the central atom. Both molecules consist of 3 atoms. The first molecule has a bond angle of 120 degrees between the central atom and the other tw...
- Tue Nov 12, 2019 1:28 pm
- Forum: Student Social/Study Group
- Topic: Test 2
- Replies: 7
- Views: 497
Test 2
What topics will test 2 cover? Also, will it cover topics before the midterm?
- Tue Nov 12, 2019 12:57 pm
- Forum: Bronsted Acids & Bases
- Topic: Autoprotolysis
- Replies: 1
- Views: 212
Autoprotolysis
What exactly is autoprotolysis? Also, can someone please explain what the autoprotolysis constant represents.
- Tue Nov 12, 2019 12:52 pm
- Forum: Amphoteric Compounds
- Topic: Amphiprotic
- Replies: 11
- Views: 612
Amphiprotic
What does it mean for something to be amphiprotic? Also, what is the difference between amphiprotic and amphoteric?
- Tue Nov 12, 2019 12:49 pm
- Forum: Amphoteric Compounds
- Topic: Question 6A.11
- Replies: 5
- Views: 450
Question 6A.11
Write the chemical equations of the two proton transfer
equilibria that demonstrate the amphiprotic character of (a) HCO3-; (b) HPO4 2-
Identify the conjugate acid–base pairs in each case.
equilibria that demonstrate the amphiprotic character of (a) HCO3-; (b) HPO4 2-
Identify the conjugate acid–base pairs in each case.
- Thu Nov 07, 2019 10:16 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3592805
Re: Post All Chemistry Jokes Here
My midterm grade
- Mon Nov 04, 2019 1:18 pm
- Forum: General Science Questions
- Topic: Concept Questions
- Replies: 2
- Views: 219
Concept Questions
Are there any resources we can use to practice concept questions for the midterm (not problems).
- Sun Nov 03, 2019 5:31 pm
- Forum: Trends in The Periodic Table
- Topic: Ionization Energy Exceptions
- Replies: 2
- Views: 194
Ionization Energy Exceptions
What are the exceptions to the trend of ionization energy in the periodic table?
- Sun Nov 03, 2019 5:25 pm
- Forum: Bond Lengths & Energies
- Topic: Next Lecture
- Replies: 3
- Views: 279
Next Lecture
For lecture tomorrow, are we going over review for the midterm or is Dr. Lavelle starting new material.
- Sun Nov 03, 2019 5:22 pm
- Forum: Student Social/Study Group
- Topic: Lyndon Workshop
- Replies: 1
- Views: 116
Lyndon Workshop
Is Lyndon having another workshop or review session before the midterm?
- Sun Nov 03, 2019 1:53 pm
- Forum: Lewis Structures
- Topic: Resonance Hybrid
- Replies: 2
- Views: 68
Resonance Hybrid
Will we have to have a grasp of resonance hybrids and be able to draw those lewis structures for the midterm? (Ex: Benzene)
- Sat Nov 02, 2019 6:04 pm
- Forum: Student Social/Study Group
- Topic: Chemical Formulas
- Replies: 3
- Views: 161
Chemical Formulas
For the midterm, will we have to write chemical formulas from the name of the compound or will the formula be given already?
- Sun Oct 27, 2019 5:59 pm
- Forum: Student Social/Study Group
- Topic: Midterm Length
- Replies: 7
- Views: 402
Midterm Length
Has Lavelle mentioned how long the midterm is supposed to be
- Sun Oct 27, 2019 5:38 pm
- Forum: Student Social/Study Group
- Topic: Miderm Review
- Replies: 10
- Views: 650
Re: Miderm Review
Alright. Thank You so much. I'm debating whether I should spend the $64 or not.
- Sun Oct 27, 2019 4:12 pm
- Forum: Student Social/Study Group
- Topic: Miderm Review
- Replies: 10
- Views: 650
Re: Miderm Review
Do I have to pay for Sapling? The website says I have to pay $64 to enroll in the "Homework Course"
- Sun Oct 27, 2019 1:51 pm
- Forum: Student Social/Study Group
- Topic: Miderm Review
- Replies: 10
- Views: 650
Miderm Review
Outside of the review sessions, does Lavelle offer any study guides or practice tests prior to the midterm?
- Sat Oct 26, 2019 12:19 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Valence Electrons in D-block
- Replies: 1
- Views: 103
Valence Electrons in D-block
Can somebody please explain how we're supposed to figure out how many valence electrons are in d-block elements
- Sun Oct 20, 2019 2:44 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: 1D.1
- Replies: 5
- Views: 261
Re: 1D.1
Why is that
- Sun Oct 20, 2019 2:38 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: 1D.1
- Replies: 5
- Views: 261
1D.1
Which of the following increase when the electron in a hydrogen atom undergoes a transition from the 1s-orbital to a 2p-orbital?
(a) Energy of the electron.
(b) Value of n.
(c) Value of l.
(d) Radius of the atom.
(a) Energy of the electron.
(b) Value of n.
(c) Value of l.
(d) Radius of the atom.
- Sat Oct 19, 2019 3:13 pm
- Forum: DeBroglie Equation
- Topic: 1B.15 a
- Replies: 4
- Views: 158
Re: 1B.15 a
Oh, alright. Thank you so much.
- Sat Oct 19, 2019 3:10 pm
- Forum: DeBroglie Equation
- Topic: 1B.15 a
- Replies: 4
- Views: 158
1B.15 a
The velocity of an electron that is emitted from a
metallic surface by a photon is 3.63 x 10^3 km/s
(a) What is the wavelength of the ejected electron?
I'm confused because the solution manual says to use de Broglie's equation. However, there is no mass given in the question.
metallic surface by a photon is 3.63 x 10^3 km/s
(a) What is the wavelength of the ejected electron?
I'm confused because the solution manual says to use de Broglie's equation. However, there is no mass given in the question.
- Sat Oct 19, 2019 3:04 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Question about last lecture
- Replies: 4
- Views: 143
Re: Question about last lecture
So for future tests and exams, should we use the second method only?
- Sat Oct 19, 2019 2:08 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Question about last lecture
- Replies: 4
- Views: 143
Question about last lecture
When Dr. Lavelle was writing the electron configuration for Carbon, he changed it from 1s^2 2s^2 2p^2 to1s^2 2s^2 2px^1 2py^1. Why did he make the change? I missed when he talked about it.
- Wed Oct 16, 2019 12:51 am
- Forum: Properties of Light
- Topic: The extent of the change in the electrical field
- Replies: 2
- Views: 157
The extent of the change in the electrical field
What does "The extent of the change in the electrical field" mean exactly?
- Sun Oct 13, 2019 9:45 pm
- Forum: *Shrodinger Equation
- Topic: Schrodinger's Equation
- Replies: 8
- Views: 505
Schrodinger's Equation
Can someone please further explain what Schrodinger's Equation is used for exactly. I'm still unsure.
- Sun Oct 13, 2019 2:58 pm
- Forum: Properties of Light
- Topic: Photon Model
- Replies: 3
- Views: 196
Re: Photon Model
Light behaves as both a wave and a particle. Those particles are represented as photons.
- Sun Oct 13, 2019 1:46 pm
- Forum: Photoelectric Effect
- Topic: Video Modules
- Replies: 7
- Views: 348
Video Modules
Does Dr. Lavelle recommend we watch and take notes on the modules before going forward with the HW?
- Sun Oct 13, 2019 1:42 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: First Test Result
- Replies: 5
- Views: 301
First Test Result
Does anybody know when we are supposed to get our first tests back and graded? Is it supposed to be in our discussion this week?
- Wed Oct 09, 2019 8:49 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Wrong Textbook
- Replies: 12
- Views: 1323
Re: Wrong Textbook
I have the 6th edition, and everything looks the same to me when compared to the 7th edition.
- Sun Oct 06, 2019 9:33 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student [ENDORSED]
- Replies: 297
- Views: 408885
Re: Advice from a Medical Student [ENDORSED]
Thank You so much for posting this. I've been stressing a lot recently, and this really cleared things up for me.
- Sun Oct 06, 2019 4:24 pm
- Forum: Empirical & Molecular Formulas
- Topic: Chemical Formulas
- Replies: 2
- Views: 200
Re: Chemical Formulas
Our TA said we should memorize diatomic ions.
- Sun Oct 06, 2019 4:20 pm
- Forum: Limiting Reactant Calculations
- Topic: Reviewing High School Chem Tips
- Replies: 10
- Views: 861
Re: Reviewing High School Chem Tips
Tyler Dewitt posts some great videos on YouTube if you're struggling to grasp some specific concepts.
- Sun Oct 06, 2019 1:24 pm
- Forum: Balancing Chemical Reactions
- Topic: Hydrates
- Replies: 1
- Views: 123
Re: Hydrates
Yes you include the molar mass of the hydrate. In this case you would include the 5 moles of H2O making the total molar mass to be 249.6 g/mol
- Thu Oct 03, 2019 1:03 am
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Homework Problem E.15
- Replies: 4
- Views: 204
Re: Homework Problem E.15
Alright. I got it. Thank You.
- Tue Oct 01, 2019 11:49 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Homework Problem E.15
- Replies: 4
- Views: 204
Homework Problem E.15
The molar mass of the metal hydroxide M(OH)2 is 74.10 g*mol^-1. What is the molar mass of the sulfide of this metal?