Search found 106 matches
- Thu Mar 12, 2020 7:48 pm
- Forum: General Science Questions
- Topic: ENDGAME #12
- Replies: 2
- Views: 353
Re: ENDGAME #12
So the expression would include the intermediate?
- Thu Mar 12, 2020 7:41 pm
- Forum: General Science Questions
- Topic: ENDGAME #12
- Replies: 2
- Views: 353
ENDGAME #12
What is the pre-equilibrium approach?
- Thu Mar 12, 2020 6:11 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Effect of Temperature on Rate Constant
- Replies: 2
- Views: 205
Re: Effect of Temperature on Rate Constant
As temperature increases, so does the rate constant.
- Thu Mar 12, 2020 6:10 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Arrhenius equation
- Replies: 5
- Views: 389
Re: Arrhenius equation
A is the frequency of collisions with the correct orientation.
- Thu Mar 12, 2020 6:09 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: U vs H
- Replies: 15
- Views: 1249
Re: U vs H
Delta U is the change in internal energy whereas delta H is change in enthalpy.
- Thu Mar 12, 2020 6:08 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Final Topics
- Replies: 10
- Views: 846
Re: Final Topics
It's cumulative so Outlines 1-6 are a comprehensive guideline on what will be on the final!
- Thu Mar 12, 2020 6:07 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: comparing rates
- Replies: 3
- Views: 264
Re: comparing rates
Yes they would be the same since the amount of moles formed and consumed are the same.
- Thu Mar 12, 2020 6:05 pm
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: 7A.11) 700K?
- Replies: 6
- Views: 494
Re: 7A.11) 700K?
You ignore this variable for temperature since it is not included in the equation.
- Tue Mar 10, 2020 1:13 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Developing a Proposed Reaction Mechanism
- Replies: 3
- Views: 257
Re: Developing a Proposed Reaction Mechanism
I believe the reaction mechanism just needs to correlate with the rate law.
- Tue Mar 10, 2020 1:10 am
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: intermediate species
- Replies: 4
- Views: 375
Re: intermediate species
Intermediates are used up in the reaction, meaning they are formed in one step and consumed in another.
- Tue Mar 10, 2020 1:08 am
- Forum: General Rate Laws
- Topic: Book Problem 7A.17
- Replies: 3
- Views: 310
Re: Book Problem 7A.17
When the reaction rate does not change for the experiments you look at that means that the reactant is 0 order.
- Tue Mar 10, 2020 1:05 am
- Forum: General Rate Laws
- Topic: 7A.15
- Replies: 6
- Views: 454
Re: 7b.15
Generally when a reactant in the rate equation is squared it is 2nd order.
- Tue Mar 10, 2020 1:04 am
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: Kinetics v Therodynamics
- Replies: 8
- Views: 585
Re: Kinetics v Therodynamics
Kinetics regards the actual rate of the reaction and how fast or slow it goes while thermodynamics regards if the reaction will proceed.
- Tue Mar 10, 2020 1:01 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE table
- Replies: 5
- Views: 436
Re: ICE table
When the equilibrium constant is less than 10^-3 you can assume x is negligible.
- Tue Mar 10, 2020 1:00 am
- Forum: Experimental Details
- Topic: Which Experiment to Use
- Replies: 5
- Views: 1081
Re: Which Experiment to Use
You need to choose the reaction where the values of the other equations are constant and the actual reactant you are looking at changes.
- Tue Mar 10, 2020 12:58 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Arrhenius Equation on Equation Sheet
- Replies: 1
- Views: 164
Re: Arrhenius Equation on Equation Sheet
Yes I believe so
- Tue Mar 10, 2020 12:57 am
- Forum: General Rate Laws
- Topic: Overall rate law
- Replies: 8
- Views: 647
Re: Overall rate law
The whole reaction depends on the slow step.
- Mon Mar 09, 2020 3:02 pm
- Forum: General Rate Laws
- Topic: molecularity
- Replies: 8
- Views: 597
Re: molecularity
Yes termolecular would be considered a 3rd order reaction I believe. However these are very uncommon.
- Mon Mar 09, 2020 3:01 pm
- Forum: Student Social/Study Group
- Topic: Final
- Replies: 21
- Views: 1421
Re: Final
Final exam is cumulative: Outlines 1-6. I believe it still will be taken in person.
- Sun Mar 08, 2020 3:09 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: When to add Platinum
- Replies: 8
- Views: 485
Re: When to add Platinum
Add platinum or another inert electrode when there is not a phase change or the oxidized and reduced things are in the same soluttion in the cathode or anode.
- Sun Mar 08, 2020 3:06 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: concentration cells
- Replies: 5
- Views: 420
Re: concentration cells
In concentration cells the E°cell is always 0.
- Sun Mar 08, 2020 3:05 pm
- Forum: General Science Questions
- Topic: Review Packet
- Replies: 14
- Views: 1258
Re: Review Packet
The review sessions for the final are up on the 14B website!
- Sun Mar 01, 2020 2:38 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: salt bridge
- Replies: 11
- Views: 680
Re: salt bridge
It disrupts the charges from building up and it keeps neutrality.
- Sat Feb 29, 2020 9:16 pm
- Forum: Balancing Redox Reactions
- Topic: When to add H+ or H20
- Replies: 19
- Views: 2484
Re: When to add H+ or H20
h2o is used to balance the amounts of oxygen whereas h+ is used to balance the hydrogens.
- Mon Feb 24, 2020 8:40 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3590713
Re: Post All Chemistry Jokes Here
How often do I tell chemistry jokes?
Periodically.
Periodically.
- Mon Feb 24, 2020 8:38 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Concentration Cells
- Replies: 5
- Views: 381
Re: Concentration Cells
A salt bridge can be used to transfer ions.
- Mon Feb 24, 2020 8:36 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Galvanic/voltaic cell
- Replies: 6
- Views: 492
Re: Galvanic/voltaic cell
Galvanic cells gets its energy from the redox reactions that are spontaneous and the electrolytic cells contain non-spont. reactions and needs an electron source which is external.
- Mon Feb 24, 2020 8:34 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: What does the nitrate do in a concentration cell?
- Replies: 6
- Views: 473
Re: What does the nitrate do in a concentration cell?
In order to balance the charges nitrate flows through the porous disk.
- Mon Feb 24, 2020 8:32 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Salt Bridge
- Replies: 6
- Views: 422
Re: Salt Bridge
In the salt bridge, the anions flow to the anode and the cations flow toward the cathode.
- Mon Feb 24, 2020 8:31 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Diagrams
- Replies: 9
- Views: 602
Re: Cell Diagrams
A line is a porous disk, double line is a salt bridge
- Mon Feb 24, 2020 8:28 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Eo as an intensive property
- Replies: 9
- Views: 647
Re: Eo as an intensive property
It does not change even with a variable change in matter.
- Mon Feb 24, 2020 8:25 pm
- Forum: Balancing Redox Reactions
- Topic: Half reactions
- Replies: 17
- Views: 917
Re: Half reactions
When it is balanced the number of electrons on the products and reactants of each reaction are balanced.
- Mon Feb 24, 2020 8:22 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: test 2 material clarification
- Replies: 10
- Views: 681
Re: test 2 material clarification
yes! it will be I believe.
- Mon Feb 24, 2020 8:21 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Concentration and Cell Potential
- Replies: 5
- Views: 3082
Re: Concentration and Cell Potential
Cell potential changes with the change in concentration: as the reactants increase and products decrease CP increases and as reactants decrease and products increase CP decreases.
- Mon Feb 10, 2020 12:49 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Stability and Bond Enthalpy
- Replies: 3
- Views: 198
Re: Stability and Bond Enthalpy
I believe that when the bond enthalpy is higher, the bond is stronger.
- Sat Feb 08, 2020 4:38 pm
- Forum: Phase Changes & Related Calculations
- Topic: Steam burns more than water
- Replies: 5
- Views: 256
Re: Steam burns more than water
Since steam has a higher energy than water, it burns more.
- Sun Feb 02, 2020 8:42 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Quadratic Equation
- Replies: 5
- Views: 470
Re: Quadratic Equation
https://www.khanacademy.org/math/algebr ... ula-review
This article is helpful in reviewing the quadratic formula! Check it out :)
This article is helpful in reviewing the quadratic formula! Check it out :)
- Sun Feb 02, 2020 2:50 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: Phase change
- Replies: 20
- Views: 864
Re: Phase change
Delta H is positive since melting is breaking bonds and energy is required in order to do so.
- Sun Feb 02, 2020 2:40 pm
- Forum: Calculating Work of Expansion
- Topic: Homework Textbook
- Replies: 1
- Views: 113
Re: Homework Textbook
Here you go!
- Sun Feb 02, 2020 2:32 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Elements
- Replies: 8
- Views: 174
Re: Elements
It is because since molecules such as O2 and N2 are readily discovered in this state the enthalpy of formation is 0 kJ/mol.
- Sun Feb 02, 2020 2:27 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: pressure v. volume
- Replies: 3
- Views: 133
Re: pressure v. volume
With constant pressure and no change in volume delta U= delta H. Also when there is no change in pressure and constant volume delta U= delta H.
- Sun Feb 02, 2020 2:24 pm
- Forum: Ideal Gases
- Topic: pv=nrt
- Replies: 9
- Views: 396
Re: pv=nrt
Yes, p,v,n, and t are all variable while r is constant. It just depends on what information the question provides for you.
- Sun Feb 02, 2020 2:22 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: residual entropy
- Replies: 4
- Views: 192
Re: residual entropy
It is the difference between the entropy not at equilibrium and crystal state of a substance close to absolute zero.
- Sun Jan 26, 2020 12:24 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: State Property & State Function
- Replies: 1
- Views: 91
Re: State Property & State Function
A state property is an entity that does not depend on how the substance was prepared. State function is another way to indicate a state property
- Sun Jan 26, 2020 12:21 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Negative Square Root solving an ICE box
- Replies: 13
- Views: 584
Re: Negative Square Root solving an ICE box
Having a negative square root would not make sense in the context of the problem therefore you should check your previous work to see if you have made a mistake.
- Mon Jan 20, 2020 11:36 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kw temperature
- Replies: 8
- Views: 180
Re: Kw temperature
Room temperature, approximately 25°C
- Mon Jan 20, 2020 12:46 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Le Chatelier's principle
- Replies: 7
- Views: 438
Re: Le Chatelier's principle
This principle basically explains that the reaction will favor one side (either the products or the reactants) and how the reaction will continue when an additional condition is placed on the reaction at equilibrium.
- Mon Jan 20, 2020 12:40 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Pressure changes
- Replies: 7
- Views: 223
Re: Pressure changes
If the pressure is increased then the reaction will favor the side where there are less moles of either the products or the reactants.
- Mon Jan 20, 2020 12:38 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: ice table
- Replies: 5
- Views: 252
Re: ice table
The ICE table can include solids and liquids however the values will be 0 since they are not included in the equilibrium constant equation so they're impact is negligible.
- Mon Jan 20, 2020 12:36 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Adding a catalyst
- Replies: 7
- Views: 312
Re: Adding a catalyst
In addition, adding a catalyst does not affect the amount of free energy (G) in the reaction.
- Mon Jan 20, 2020 12:35 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: q vs k
- Replies: 62
- Views: 2617
Re: q vs k
Yes Q is the value calculated when the reaction is not at equilibrium.
- Mon Jan 20, 2020 12:34 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ATP hydrolysis [ENDORSED]
- Replies: 3
- Views: 122
Re: ATP hydrolysis [ENDORSED]
I'm not sure what exact details we have to know but in general, ATP hydrolysis is exergonic because there is less free energy in the products than the reactants.
- Mon Jan 13, 2020 10:46 pm
- Forum: Ideal Gases
- Topic: When to use this equation
- Replies: 14
- Views: 493
Re: When to use this equation
This equation is the ideal gas equation and should be used when you want to convert the concentration to pressure or vice versa.
- Mon Jan 13, 2020 10:41 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Are Lectures Bruincasted?
- Replies: 10
- Views: 393
Re: Are Lectures Bruincasted?
The modules have very similar information to his lectures so review the modules if you are unclear with a certain topic!
- Mon Jan 13, 2020 10:40 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Studying tips
- Replies: 10
- Views: 497
Re: Studying tips
Review your notes at the end of every week to stay on top of the content!
- Sun Dec 08, 2019 11:55 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3590713
Re: Post All Chemistry Jokes Here
What do you call a funny heme complex?
A meme complex :D
A meme complex :D
- Fri Dec 06, 2019 5:56 pm
- Forum: Naming
- Topic: Abbreviations
- Replies: 2
- Views: 223
Re: Abbreviations
Here's a screenshot from the book.
- Thu Dec 05, 2019 11:42 pm
- Forum: Significant Figures
- Topic: Sig Figs on Tests
- Replies: 24
- Views: 2243
Re: Sig Figs on Tests
The problem usually contains an initial number and is usually the standard for how many sig figs need to be in the answer. As a rule of thumb the answer should have the lowest number of sig figs as given in the problem.
- Thu Dec 05, 2019 11:39 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: pKa
- Replies: 1
- Views: 158
Re: pKa
pKa= -log(Ka)
It is used to address the strength of acids. If the pKa is low then the acid is strong, if the pKa is high it refers to a weak acid.
It is used to address the strength of acids. If the pKa is low then the acid is strong, if the pKa is high it refers to a weak acid.
- Thu Dec 05, 2019 11:37 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: 6C.17
- Replies: 2
- Views: 119
Re: 6C.17
Strong bases also dissociate completely similar to strong acids. By identifying which molecule has a greater dissociation ability you can identify which molecule is stronger.
- Thu Dec 05, 2019 11:35 pm
- Forum: DeBroglie Equation
- Topic: Quantum Help
- Replies: 5
- Views: 527
Re: Quantum Help
First identify what the problem addresses in terms of topics because each topic we learned in quantum has particular equations. For example if the question is regarding the photoelectric effect the equations used are very centralized to that topic.
- Mon Dec 02, 2019 12:06 am
- Forum: Properties & Structures of Inorganic & Organic Bases
- Topic: Strength
- Replies: 4
- Views: 264
Re: Strength
A strong base is one that is completely dissociated in an aqueous solution.
- Sun Dec 01, 2019 10:00 am
- Forum: Biological Examples
- Topic: Vitamin B12
- Replies: 3
- Views: 181
Re: Vitamin B12
Anemia results from a low vitamin B12 count.
- Sun Dec 01, 2019 9:47 am
- Forum: Student Social/Study Group
- Topic: Wednesday 11/27 Lecture
- Replies: 5
- Views: 404
Re: Wednesday 11/27 Lecture
Yes I can send mine to you!
- Sat Nov 30, 2019 10:47 pm
- Forum: Bronsted Acids & Bases
- Topic: Bronsted or Lewis Definition?
- Replies: 6
- Views: 409
Re: Bronsted or Lewis Definition?
I believe for the final we will have to know both the bronsted and lewis definitions since we went over both in lecture.
Re: Naming
I believe ferrate is the Latin name for iron and we use this name for coordination compounds.
- Fri Nov 29, 2019 1:50 pm
- Forum: Lewis Acids & Bases
- Topic: acidic oxide/basic oxide
- Replies: 2
- Views: 240
Re: acidic oxide/basic oxide
Acidic oxides usually are oxides of nonmetals whereas basic oxides are normally oxides of metals. So, acidic oxides dissolve in water to form acids while basic oxides dissolve in water to form a metal oxide which is basic. In addition, acidic oxides are covalent compounds whereas basic oxides are io...
- Fri Nov 29, 2019 1:45 pm
- Forum: Bronsted Acids & Bases
- Topic: 6D11
- Replies: 1
- Views: 191
Re: 6D11
By breaking down KBr, K+ and Br- is formed. K+ is weak and is attracted to the negatively charged H20 however the attraction is not completely strong enough to adjust the structure of the water molecule. Br- is attracted to the positively charged side of H2O but also isn't strong enough to adjust th...
- Mon Nov 25, 2019 6:54 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2
- Replies: 1
- Views: 118
Test 2
When will be getting back our second test?
- Mon Nov 25, 2019 6:46 pm
- Forum: Naming
- Topic: roman numerals
- Replies: 7
- Views: 722
Re: roman numerals
Many of the transition metals have multiple charged ions therefore the roman numerals clarifies and distinguishes them.
- Mon Nov 25, 2019 6:40 pm
- Forum: Hybridization
- Topic: Tetravalence of Carbon
- Replies: 3
- Views: 240
Re: Tetravalence of Carbon
Carbon is tetravalent because it can form 4 bonds with atoms.
- Sun Nov 17, 2019 8:26 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Terminal Atom
- Replies: 2
- Views: 222
Re: Terminal Atom
They are the atoms present at both ends of a molecule.
- Sun Nov 17, 2019 8:22 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: np force?
- Replies: 2
- Views: 101
Re: np force?
Dispersion/Van der Waals
- Sun Nov 17, 2019 8:18 pm
- Forum: Bond Lengths & Energies
- Topic: 3F5 a
- Replies: 2
- Views: 226
Re: 3F5 a
Since ionic bonds form strong electrostatic interactions with ions they have higher melting points than covalent compounds.
- Sun Nov 17, 2019 8:15 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Molecular Shapes
- Replies: 6
- Views: 428
Re: Molecular Shapes
Yes, I believe we do since it was covered in lecture.
- Sun Nov 17, 2019 8:11 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond Angles
- Replies: 4
- Views: 303
Re: Bond Angles
Yes I don't think we need to know the exact angles but remember if there is a lone pair then the angle might be less than the ones indicated.
- Sat Nov 16, 2019 5:16 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Hydrogen Bonding
- Replies: 6
- Views: 416
Re: Hydrogen Bonding
It's considered a type of dipole-dipole interaction but it is stronger than the normal dipole-dipole interaction.
- Sat Nov 16, 2019 5:14 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR and Polarity
- Replies: 4
- Views: 140
Re: VSEPR and Polarity
You can look at the symmetry of the atoms in order to determine polarity.
- Sat Nov 16, 2019 5:03 pm
- Forum: Dipole Moments
- Topic: Interaction Potential Energy
- Replies: 2
- Views: 170
Re: Interaction Potential Energy
The equation sheet is linked here: https://lavelle.chem.ucla.edu/wp-conten ... ations.pdf
- Sat Nov 16, 2019 4:57 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: Ion Dipole v. Ion Induced Dipole
- Replies: 1
- Views: 234
Re: Ion Dipole v. Ion Induced Dipole
Ion dipole occurs between an ion that is fully charged and a dipole that is partially charged, whereas ion induced dipole occurs with a fully charged ion and a dipole that is temporarily charged.
- Sat Nov 16, 2019 4:52 pm
- Forum: Dipole Moments
- Topic: Shape of Molecule/Strength of Interactions
- Replies: 4
- Views: 308
Re: Shape of Molecule/Strength of Interactions
Rod shaped molecules have more surface area when they are condensed with one another therefore increasing the area of intermolecular forces having a higher boiling point, spherical molecules have lower boiling points since they don't have an increase in forces.
- Mon Nov 04, 2019 9:22 am
- Forum: Lewis Structures
- Topic: Oxygen
- Replies: 2
- Views: 227
Re: Oxygen
This is because in the case of H2O due to the electron electron repulsion the electrons expand forcing the bonds to be pushed down causing H2O to have a bent shape.
- Mon Nov 04, 2019 9:17 am
- Forum: Electronegativity
- Topic: Difference
- Replies: 5
- Views: 317
Re: Difference
Electronegativity is the ability for an atom to electrons to bond to the element and polarizability is the extent to which an atom is distorted and how dipoles form.
- Sun Nov 03, 2019 10:07 am
- Forum: Electronegativity
- Topic: electronegativity trend
- Replies: 9
- Views: 702
Re: electronegativity trend
Electronegativity decreases down a group due to the increase in shells making the electrons further from the nucleus therefore decreasing the attraction between the protons and electrons.
- Sun Nov 03, 2019 10:03 am
- Forum: Dipole Moments
- Topic: Significance
- Replies: 2
- Views: 104
Re: Significance
They help to predict the molecule's polarity.
- Sun Nov 03, 2019 10:00 am
- Forum: Bond Lengths & Energies
- Topic: Ions for the Midterm
- Replies: 3
- Views: 216
Re: Ions for the Midterm
I believe that for those they might give us the formula since those aren't the ions that we see everyday however I am not completely sure.
- Sun Oct 27, 2019 10:23 pm
- Forum: Ionic & Covalent Bonds
- Topic: Valence Electrons
- Replies: 3
- Views: 127
Re: Valence Electrons
You can figure out the amount by looking at the group the element is categorized under. The group number is usually the amount of valence electrons the element has.
- Sun Oct 27, 2019 9:36 pm
- Forum: Lewis Structures
- Topic: Hybridization
- Replies: 2
- Views: 101
Re: Hybridization
The hybridization is associated withthe atom's steric number. Which is "steric number=# of atoms bonded to the atom + # of lone pairs the atom has"
- Sun Oct 27, 2019 9:33 pm
- Forum: Lewis Structures
- Topic: VSEPR: E in AXE
- Replies: 2
- Views: 118
Re: VSEPR: E in AXE
It represents the free electron pairs.
- Sun Oct 27, 2019 9:30 pm
- Forum: Student Social/Study Group
- Topic: Midterm Length
- Replies: 7
- Views: 402
Re: Midterm Length
Where will be taking the midterm? The same lecture hall as class?
- Sun Oct 27, 2019 9:27 pm
- Forum: Trends in The Periodic Table
- Topic: Electronegativity vs. effective nuclear charge
- Replies: 5
- Views: 2091
Re: Electronegativity vs. effective nuclear charge
Electronegativity is the process of atoms to attract electrons in order to build bonds. Effective nuclear charge is the nucleus's pull and strength to hold in the electrons.
- Sun Oct 20, 2019 5:13 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Advice for studying
- Replies: 92
- Views: 7141
Re: Advice for studying
I do best when I study in a group. I understand information better when other people explain and give their input into various topics!
- Sun Oct 20, 2019 5:08 pm
- Forum: General Science Questions
- Topic: Midterm
- Replies: 12
- Views: 499
Re: Midterm
Will there be a review session for the midterm?
- Sun Oct 20, 2019 5:03 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Rydberg's Constant
- Replies: 3
- Views: 156
Re: Rydberg's Constant
Yes, just stick to the ones he provides us.
- Sun Oct 20, 2019 5:00 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Matter and wavelike properties
- Replies: 3
- Views: 150
Re: Matter and wavelike properties
For large objects the wavelength would be far to small to be observable.
- Sun Oct 20, 2019 1:18 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Wave Function vs Orbital vs Subshell vs Shell
- Replies: 3
- Views: 234
Re: Wave Function vs Orbital vs Subshell vs Shell
A quick explanation is that the atomic orbital is math function in which explains the wave behavior of either 1 electron or an electron pair in an atom and are composed of electrons in the same energy levels but have different spins. The wave functions are exact physical solutions of Schrodinger equ...
- Mon Oct 14, 2019 8:56 am
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: En equation
- Replies: 1
- Views: 205
Re: En equation
Yes, I believe so, however keep in mind that when applying this number to the context of various problems the value of the photon emitted will not be negative.
- Mon Oct 14, 2019 8:47 am
- Forum: Student Social/Study Group
- Topic: Places to study
- Replies: 3
- Views: 241
Re: Places to study
There are a ton of coffee shops in Westwood that you can study at! Profetta is one of my favorites.
- Mon Oct 14, 2019 8:46 am
- Forum: Properties of Light
- Topic: Constants
- Replies: 2
- Views: 127
Re: Constants
Planck's constant connects the frequency of the electromagnetic radiation to the energy in a quantum or also known as a photon. Rydberg's constant connects the electromagnetic spectra of an atom and is a physical constant.
- Sun Oct 13, 2019 9:57 pm
- Forum: Photoelectric Effect
- Topic: electrons
- Replies: 2
- Views: 227
Re: electrons
hello! I was confused on this too and I found this website that explains it very well! Hope this helps :) https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Quantum_Mechanics/09._The_Hydrogen_Atom/Atomic_...