Search found 103 matches

by Bryce Barbee
Sun Mar 15, 2020 7:37 am
Forum: Ideal Gases
Topic: Kc vs Kp
Replies: 43
Views: 509

Re: Kc vs Kp

It depends on if the give you pressures or concentrations. I am pretty sure that you can use both if its a gas though.
by Bryce Barbee
Sun Mar 15, 2020 7:35 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Delta S
Replies: 8
Views: 125

Re: Delta S

Total includes surroundings and system.
by Bryce Barbee
Sun Mar 15, 2020 7:34 am
Forum: Balancing Redox Reactions
Topic: cathode vs anode
Replies: 11
Views: 191

Re: cathode vs anode

Anode is left, cathode on the right
by Bryce Barbee
Sat Mar 14, 2020 6:22 pm
Forum: Administrative Questions and Class Announcements
Topic: Partial Credit
Replies: 2
Views: 47

Re: Partial Credit

Maybe there is a range of values that they use that allow you to receive credit
by Bryce Barbee
Sun Mar 08, 2020 9:24 pm
Forum: Van't Hoff Equation
Topic: Van't Hoff Equation
Replies: 6
Views: 101

Re: Van't Hoff Equation

I believe that the main use of the equation is to tell how K is affected by a change in temperature. That's how I've seen it used.
by Bryce Barbee
Sun Mar 08, 2020 9:22 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: K < >
Replies: 8
Views: 84

Re: K < >

This will tell you if the reaction favors products or reactants at equilibrium. If K is greater than 1, then more products are formed. If it is less then more reactants.
by Bryce Barbee
Sun Mar 08, 2020 9:20 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Exam Material Distribution
Replies: 6
Views: 67

Final Exam Material Distribution

Does anyone know how the material is going to be distributed for the final exam? Is it going to be mainly kinetics since that is the only thing we haven't been tested on yet or is it going to be even with all of the material?
by Bryce Barbee
Sun Mar 08, 2020 9:16 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Figuring out n
Replies: 15
Views: 186

Re: Figuring out n

n is the moles of electrons so you need to balance out the redox reaction in order to see how many electrons are being transferred.
by Bryce Barbee
Sun Mar 08, 2020 9:14 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: calculating Q
Replies: 12
Views: 100

Re: calculating Q

I was told that it is anode/cathode when using this equation.
by Bryce Barbee
Sat Feb 29, 2020 1:03 pm
Forum: Balancing Redox Reactions
Topic: Reducing/Oxidizing Agents
Replies: 13
Views: 76

Reducing/Oxidizing Agents

Can someone explain the concept behind reducing and oxidizing agents. How do you determine which is which?
by Bryce Barbee
Sat Feb 29, 2020 12:40 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: No Salt Bridge
Replies: 7
Views: 67

Re: No Salt Bridge

The left is losing electrons but they have no where to go so they build up. This is why the negative charge increases.
by Bryce Barbee
Sat Feb 29, 2020 12:38 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Spontaneous reactions
Replies: 6
Views: 45

Re: Spontaneous reactions

I don't think that cell potential is affected or based on the spontaneity of the reaction but I might be wrong. The cell potential is based on the difference between potentials of the products and reactants.
by Bryce Barbee
Sat Feb 29, 2020 12:36 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Anode vs Cathode
Replies: 15
Views: 123

Re: Anode vs Cathode

During discussion, my TA would tell us which one was the anode and which was the cathode. I think it is based off of left and right usually though.
by Bryce Barbee
Sat Feb 29, 2020 12:35 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Galvanic vs Voltaic Cells
Replies: 4
Views: 39

Galvanic vs Voltaic Cells

Can someone explain the differences between galvanic and voltaic cells?
by Bryce Barbee
Sun Feb 23, 2020 6:15 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: how to get n in equation
Replies: 8
Views: 82

Re: how to get n in equation

N is found by finding how many electrons are being transferred in the process.
by Bryce Barbee
Sun Feb 23, 2020 6:13 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Boltzmann Formula
Replies: 11
Views: 190

Re: Boltzmann Formula

W is found by doing the number of positions to the power of how many molecules there are. This does have some relation to resonance,
by Bryce Barbee
Sun Feb 23, 2020 6:12 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Negative E
Replies: 3
Views: 23

Re: Negative E

Yes. I am pretty sure that it means that the reverse is spontaneous. If positive, then the forward is spontaneous.
by Bryce Barbee
Sun Feb 23, 2020 6:10 pm
Forum: Balancing Redox Reactions
Topic: Flow of electrons
Replies: 11
Views: 87

Re: Flow of electrons

I'm pretty sure that it is always anode to cathode.
by Bryce Barbee
Sun Feb 23, 2020 6:09 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: neg vs pos
Replies: 9
Views: 58

Re: neg vs pos

I believe that it relates to if the process is spontaneous. If negative, then it is not spontaneous. If positive, it is spontaneous.
by Bryce Barbee
Sun Feb 16, 2020 7:09 pm
Forum: Balancing Redox Reactions
Topic: Seperating Redoz RXNS
Replies: 7
Views: 42

Re: Seperating Redoz RXNS

I think he meant half reactions by separating the red/ox into reduced and oxidized parts. This means that you show which reactants in the rxn become reduced or oxidized in 2 different pieces.
by Bryce Barbee
Sun Feb 16, 2020 7:07 pm
Forum: Van't Hoff Equation
Topic: delta s
Replies: 9
Views: 84

Re: delta s

This is because delta S naught is the standard entropy of that reaction, therefore making it constant. We then have to include the temperature to show how the observed entropy can change depending on how you change the different parameters such as temp.
by Bryce Barbee
Sun Feb 16, 2020 7:05 pm
Forum: Balancing Redox Reactions
Topic: Memorizing charges
Replies: 11
Views: 100

Re: Memorizing charges

I'm pretty sure that we only need to know the really common ones that we also use as examples and in homework problems. Only the ones that are constantly repeated will have to be memorized most likely.
by Bryce Barbee
Sun Feb 16, 2020 7:04 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Gibbs free energy
Replies: 5
Views: 60

Re: Gibbs free energy

Just like with entropy, the knot on the delta G means that it is the standard for that reaction at standard conditions.
by Bryce Barbee
Sun Feb 16, 2020 7:02 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: q of ice and q of water
Replies: 8
Views: 134

Re: q of ice and q of water

This is because energy has to be conserved. Therefore, if heat is loss by ice when turning to water, then that equal amount of energy must be transferred to the water.
by Bryce Barbee
Sun Feb 09, 2020 7:11 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: state function mnemonic device
Replies: 3
Views: 61

Re: state function mnemonic device

What is this telling us? Is it showing a relationship between them or just showing what each of the variables represents?
by Bryce Barbee
Sun Feb 09, 2020 7:05 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Delta S Universe
Replies: 3
Views: 52

Re: Delta S Universe

I think we only use it with reversible reactions but I am not 100% sure.
by Bryce Barbee
Sun Feb 09, 2020 7:04 pm
Forum: Administrative Questions and Class Announcements
Topic: slides
Replies: 8
Views: 92

Re: slides

One of the TAs just posted the slides from the thermodynamics review. I tried to attach it.
by Bryce Barbee
Sun Feb 09, 2020 7:01 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Reversible vs Irreversible
Replies: 7
Views: 139

Re: Reversible vs Irreversible

I think with entropy it matters because one of the formulas only uses heat (reversible) divided by temperature.
by Bryce Barbee
Sun Feb 09, 2020 6:53 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: 4H.9
Replies: 1
Views: 26

4H.9

Does anyone understand how to do 4H.9 on the homework outline? It talks about 3 different containers being filled with gases of different descriptions and asks you to tell which one will have a higher entropy change when temp is increased.
by Bryce Barbee
Thu Jan 30, 2020 10:42 am
Forum: Phase Changes & Related Calculations
Topic: 4B.1
Replies: 6
Views: 77

Re: 4B.1

In that equation, the Work is equal to Work(on the system). Therefore work would be positive because the system is being compressed by the piston.
by Bryce Barbee
Thu Jan 30, 2020 10:40 am
Forum: Phase Changes & Related Calculations
Topic: Units
Replies: 16
Views: 145

Re: Units

This is because we are only looking at the changes in each and because both have the same step size, it does not matter which is used.
by Bryce Barbee
Thu Jan 30, 2020 10:39 am
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Constant Pressure
Replies: 7
Views: 70

Re: Constant Pressure

Constant pressure means that deltaP=0 and constant volume means that deltaV=0.
by Bryce Barbee
Thu Jan 30, 2020 10:38 am
Forum: Calculating Work of Expansion
Topic: Integral
Replies: 4
Views: 43

Re: Integral

I dont think that we will use the integral equation. I think it is more to show that the Wby is equation to the area under a graph of pressure vs volume.
by Bryce Barbee
Thu Jan 30, 2020 10:37 am
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: How are qp and qv different?
Replies: 3
Views: 36

How are qp and qv different?

What is the difference between qc and qv? Do you use both of the as enthalpy in a system?
by Bryce Barbee
Sat Jan 25, 2020 6:22 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Partial Pressure vs. Concentration
Replies: 5
Views: 50

Re: Partial Pressure vs. Concentration

I believe in a problem it has to give you some sort of information that leads towards either using partial pressure or concentration. If it doesnt exactly specify Kc or P of something, but then gives you the moles of one of the final products, then you know that Kc should probably be used.
by Bryce Barbee
Sat Jan 25, 2020 6:20 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Decreasing volume
Replies: 5
Views: 49

Re: Decreasing volume

I saw a Khan Academy video that explained this pretty well. The main idea of it was that if having 4 moles on the reactant side can turn into 2 moles on the product side, then you have less on the products. If you increase pressure by decreasing volume, you are making the space that everything is in...
by Bryce Barbee
Sat Jan 25, 2020 6:16 pm
Forum: Phase Changes & Related Calculations
Topic: Entropy vs Enthalpy
Replies: 9
Views: 63

Entropy vs Enthalpy

Can someone explain the relationship between Entropy and Enthalpy if there is one?
by Bryce Barbee
Sat Jan 25, 2020 6:11 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Enthalpy
Replies: 2
Views: 19

Re: Enthalpy

Vapors have a higher enthalpy than liquids because once the temperature of the system, in a water model, hits 100 degrees celsius there is more heat that is required to change the water from a liquid state to a gaseous state. This is compared to when water is at a solid ice state and needs less heat...
by Bryce Barbee
Sat Jan 25, 2020 6:01 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Ka*Kb=Kw
Replies: 5
Views: 114

Re: Ka*Kb=Kw

Both mean the same thing so it does not matter which one that you use.
by Bryce Barbee
Sun Jan 19, 2020 1:08 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Q < K
Replies: 16
Views: 129

Re: Q < K

Yes this is what that means. If Q is less than K, then the reaction still needs to form more products at a higher rate than it is going towards reactants.
by Bryce Barbee
Sun Jan 19, 2020 11:26 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: ICE Box
Replies: 4
Views: 30

Re: ICE Box

I think it is because it is a liquid and liquids aren't included when you are using concentrations that have to do with K.
by Bryce Barbee
Thu Jan 16, 2020 11:21 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Kc vs Kp
Replies: 5
Views: 40

Kc vs Kp

Can Kc be used when working with only gases or is Kp the only equilibrium constant used?
by Bryce Barbee
Thu Jan 16, 2020 11:14 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: When to use K and Kp
Replies: 12
Views: 80

Re: When to use K and Kp

I was told that Kp can be used for gases and Kc can be used for aqueous solutions. I believe that Kc can be used for gases as well if given concentrations but I am also unsure about that.
by Bryce Barbee
Thu Jan 16, 2020 11:12 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Factos effecting Equilibrium
Replies: 6
Views: 38

Re: Factos effecting Equilibrium

I believe that the only factor that affects the equilibrium constant is temperature. Other things can affect the value of Q, but the constant remains the same. I am not 100% sure though.
by Bryce Barbee
Thu Jan 09, 2020 11:13 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: K expression
Replies: 6
Views: 62

Re: K expression

When looking at it in a pressure sense, I saw something that was explaining it by talking about how the pressure of a gas can be changed and measured better than the pressure of solids and liquids. Can someone please explain to me how to ask a question on Chem Community. I cannot figure it out. Thanks
by Bryce Barbee
Thu Jan 09, 2020 11:11 am
Forum: Administrative Questions and Class Announcements
Topic: Homework 1
Replies: 18
Views: 248

Re: Homework 1

Last quarter our homework was graded for completion I am pretty sure.

Can someone please explain to me how to ask a question on Chem Community. I cannot figure it out. Thanks
by Bryce Barbee
Thu Jan 09, 2020 11:09 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Value of Kc and Kp
Replies: 6
Views: 51

Re: Value of Kc and Kp

I also believe that they should be the same but I am not 100% sure. I think they should be tho since the equations only have to do with the relationship between the ratios of Products to Reactants. Can someone please explain to me how to ask a question on Chem Community. I cannot figure it out. Thanks
by Bryce Barbee
Thu Jan 09, 2020 11:07 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Q vs K
Replies: 8
Views: 75

Re: Q vs K

Q and K are essentially the same when it comes to calculating them. The difference is that K is the value when the reaction is at equilibrium while Q can be found at anytime during the reaction to see if the action is at equilibrium or not. Can someone please explain to me how to ask a question on C...
by Bryce Barbee
Thu Jan 09, 2020 11:05 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 5G3
Replies: 8
Views: 62

Re: 5G3

I believe only gases are included when finding equilibrium constants.
Also, can someone explain how to ask a question on Chem Community? I cannot figure out how to. Thanks
by Bryce Barbee
Fri Dec 06, 2019 7:02 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: pKa and Ka
Replies: 9
Views: 178

Re: pKa and Ka

Ka is the concentration of products over reactants and pka is the -log of that.
by Bryce Barbee
Fri Dec 06, 2019 6:58 pm
Forum: Bronsted Acids & Bases
Topic: strong v weak acids
Replies: 8
Views: 105

Re: strong v weak acids

I think we just should memorize the strong acids.
by Bryce Barbee
Fri Dec 06, 2019 6:54 pm
Forum: Empirical & Molecular Formulas
Topic: charge
Replies: 4
Views: 178

Re: charge

It is because there are 2 double bonds on the Sulfur and the two single bonded oxygens have a negative 1 charge.
by Bryce Barbee
Fri Dec 06, 2019 6:44 pm
Forum: Lewis Structures
Topic: SO3 Lewis Structure
Replies: 1
Views: 153

Re: SO3 Lewis Structure

This is because even though S can expand its octect and have 3 double bonds, it rather just have 4 bonds and the oxygen wants the negative charge because of its electronegativity.
by Bryce Barbee
Fri Dec 06, 2019 6:36 pm
Forum: Naming
Topic: Coordination Number
Replies: 3
Views: 48

Re: Coordination Number

The coordination number is 6 because there are 6 ligands attached to the centralized atom.
by Bryce Barbee
Sat Nov 30, 2019 8:26 pm
Forum: Amphoteric Compounds
Topic: compounds
Replies: 5
Views: 56

Re: compounds

This means that it can be either a acid (which donates a proton) or a base (which excepts a proton).
by Bryce Barbee
Sat Nov 30, 2019 8:25 pm
Forum: Bronsted Acids & Bases
Topic: HBr
Replies: 3
Views: 39

Re: HBr

I believe this is correct because the H+ fully dissoctiates from HBr and bonds with the H20.
by Bryce Barbee
Sat Nov 30, 2019 8:23 pm
Forum: Naming
Topic: Complex
Replies: 2
Views: 28

Re: Complex

conjugates have a central atom with ligands bonded to that central atom.
by Bryce Barbee
Sat Nov 30, 2019 8:22 pm
Forum: Naming
Topic: Conjugate
Replies: 2
Views: 32

Re: Conjugate

A conjugate is a compound made up of two or more compounds.
by Bryce Barbee
Sat Nov 30, 2019 8:21 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Weak Acids & Bases
Replies: 6
Views: 101

Re: Weak Acids & Bases

Weak acids means that the there is not a full dissociation of H+ in water.
by Bryce Barbee
Wed Nov 20, 2019 1:38 pm
Forum: Hybridization
Topic: Test 2
Replies: 6
Views: 90

Re: Test 2

To expand on what max said, test 2 only forces you to know that sigma bonds are single bonds and pi bonds are in double bonds.
by Bryce Barbee
Wed Nov 20, 2019 1:37 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pairs
Replies: 8
Views: 151

Re: Lone Pairs

Lone pairs have a bigger cloud around them versus a bound atom. This pushes the other surrounding atoms slightly farther than a bound atom would normally making the angles smaller.
by Bryce Barbee
Wed Nov 20, 2019 1:34 pm
Forum: Hybridization
Topic: pi bond orientation
Replies: 4
Views: 47

Re: pi bond orientation

The orbitals of the bonds are arranged side by side which makes it so that they cannot rotate amongst themselves.
by Bryce Barbee
Wed Nov 20, 2019 1:33 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Do we need to know the pentagonal bipyramidal model for Test 2?
Replies: 6
Views: 84

Re: Do we need to know the pentagonal bipyramidal model for Test 2?

I do not think that this is one of the main ones that we need to know. I am not 100% sure tho so dont go by my word completely just to be safe.
by Bryce Barbee
Wed Nov 20, 2019 1:32 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands
Replies: 4
Views: 59

Re: Ligands

I am pretty positive that the ligand has to be the surrounding bound atoms.
by Bryce Barbee
Sun Nov 17, 2019 12:21 pm
Forum: Bond Lengths & Energies
Topic: Quiz for Next week dashes/wedges
Replies: 11
Views: 137

Re: Quiz for Next week dashes/wedges

I would not worry about dashes and wedges because he did say to not worry about them.
by Bryce Barbee
Sun Nov 17, 2019 12:16 pm
Forum: Lewis Structures
Topic: Carbon Monoxide
Replies: 4
Views: 54

Re: Carbon Monoxide

I think it is because the extra bond makes the molecule more stable.
by Bryce Barbee
Thu Nov 14, 2019 4:14 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: How to study for test 2?
Replies: 3
Views: 56

Re: How to study for test 2?

My TA said that it should be outline 4. So I'm thinking that it's VESPR and intermolecular bonds like van der wals and hydrogen bonds.
by Bryce Barbee
Thu Nov 14, 2019 4:12 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Molecular Shape Name
Replies: 17
Views: 269

Re: Molecular Shape Name

I think that we probably just have to know the ones that were said in lecture.
by Bryce Barbee
Thu Nov 14, 2019 4:10 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Trigonal pyramidal angles
Replies: 4
Views: 49

Re: Trigonal pyramidal angles

This isn't exactly answering your question but I have the tetrahedral angles at 109.5. For the trigonal bipyramidal shape, the trigonal bond angles are 120 and the axial bond angles are 90 and 180.
by Bryce Barbee
Thu Nov 14, 2019 4:06 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Do we need to know bent structures?
Replies: 5
Views: 57

Re: Do we need to know bent structures?

How do we tell if the structure is going to be bent versus linear?
by Bryce Barbee
Thu Nov 14, 2019 4:05 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Test 2
Replies: 11
Views: 109

Re: Test 2

I talked to my TA and he told me that the test should be pretty much bust all of outline 4 i think.
by Bryce Barbee
Mon Nov 11, 2019 3:47 pm
Forum: Bond Lengths & Energies
Topic: Shorter bond lengths
Replies: 12
Views: 114

Re: Shorter bond lengths

It's because the more bonds, the closer the molecules will be pulled together.
by Bryce Barbee
Mon Nov 11, 2019 3:43 pm
Forum: Dipole Moments
Topic: Ep Meaning
Replies: 4
Views: 56

Re: Ep Meaning

For this instance, Ep does stand for potential energy.
by Bryce Barbee
Mon Nov 11, 2019 3:42 pm
Forum: Dipole Moments
Topic: Dipoles
Replies: 3
Views: 40

Re: Dipoles

I think molecules have dipole moments when one atom is more electronegative than the other, such as water.
by Bryce Barbee
Sun Nov 03, 2019 9:32 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 16
Views: 191

Re: Midterm

I used the video modules that he has on the class site for the first test and those felt like they helped me a bunch.
by Bryce Barbee
Sun Nov 03, 2019 9:20 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm
Replies: 16
Views: 191

Re: Midterm

Do we have to memorize all constants and equations for the test or will there be some formula sheet?
by Bryce Barbee
Sun Nov 03, 2019 3:26 pm
Forum: Electronegativity
Topic: Ionic or covalent?
Replies: 17
Views: 213

Re: Ionic or covalent?

Ionic compounds are from metals and covalent are non metals.
by Bryce Barbee
Sun Nov 03, 2019 3:24 pm
Forum: Ionic & Covalent Bonds
Topic: Electron Configuration
Replies: 7
Views: 88

Re: Electron Configuration

I also believe that the way to do it is to get the charge closest to zero so that it is stable.
by Bryce Barbee
Sun Nov 03, 2019 3:16 pm
Forum: Lewis Structures
Topic: Limiting Reactants
Replies: 3
Views: 34

Re: Limiting Reactants

Yea I am pretty sure it is theoretically but in an actual experiment, there could be outside factors and side reactions that take place that could change the actual yield.
by Bryce Barbee
Sun Nov 03, 2019 3:11 pm
Forum: *Shrodinger Equation
Topic: H ψ = E ψ
Replies: 2
Views: 130

Re: H ψ = E ψ

The H is the Hamiltonian which is just an operator that acts on the ψ. The ψ describes the system mathematically and E is energy. In the review, the problem that was used as an example basically just gave you the H and you had to plug it into the equation and not solve. I think we just have to know ...
by Bryce Barbee
Sun Nov 03, 2019 3:06 pm
Forum: *Shrodinger Equation
Topic: Review
Replies: 4
Views: 186

Re: Review

I just came from the one at 2pm and it was formatted so that he went over different topics and what they meant and then did a couple examples. It was helpful.
by Bryce Barbee
Sun Nov 03, 2019 3:04 pm
Forum: Electronegativity
Topic: What is isoelectronic?
Replies: 13
Views: 115

Re: What is isoelectronic?

Isoelectronic is when different ions have the same number of electrons. For example, Na+ is isoelectronic with neon.
by Bryce Barbee
Sun Oct 27, 2019 1:07 pm
Forum: Bond Lengths & Energies
Topic: Bond Length
Replies: 4
Views: 47

Re: Bond Length

I am not 100% sure but i thought that the triple and double bonds are shorter in theory but when they were actually tested they were the same as the single bonds.
by Bryce Barbee
Sun Oct 27, 2019 12:53 pm
Forum: Ionic & Covalent Bonds
Topic: Double bond placement
Replies: 15
Views: 177

Re: Double bond placement

I am pretty sure that you can put them anywhere as long as the formal charges are correct.
by Bryce Barbee
Sun Oct 27, 2019 12:51 pm
Forum: Trends in The Periodic Table
Topic: atomic Radii
Replies: 11
Views: 126

Re: atomic Radii

This is because the more electrons, the more shells there will be and the more shells, the bigger the difference between the nucleus and the electrons.
by Bryce Barbee
Sun Oct 27, 2019 12:49 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Stability
Replies: 9
Views: 168

Re: Stability

The formal charge of the atom relates to how stable it is because if it is zero then it has less of a chance to gain or lose an electron.
by Bryce Barbee
Sun Oct 27, 2019 12:43 pm
Forum: Trends in The Periodic Table
Topic: Ionization Energy
Replies: 9
Views: 76

Re: Ionization Energy

Ionization energy is always positive because it requires energy in the system to remove the electron. If it was negative, that means that it is loosing energy.
by Bryce Barbee
Sun Oct 20, 2019 3:43 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: h bar
Replies: 3
Views: 70

Re: h bar

H BAR is refering to plancks constant and manipulates it when doing problems.
by Bryce Barbee
Sun Oct 20, 2019 3:39 pm
Forum: Properties of Light
Topic: Light as a wave
Replies: 4
Views: 84

Re: Light as a wave

I am not 100% sure but I am pretty certain that it does not matter where the light strikes because it still just depends on the intensity of the light and the energy in a photon.
by Bryce Barbee
Sun Oct 20, 2019 3:37 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: What does the H mean?
Replies: 9
Views: 89

Re: What does the H mean?

The H bar is referring to plancks constant when using it in problems.
by Bryce Barbee
Sun Oct 20, 2019 3:29 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect
Replies: 7
Views: 100

Re: Photoelectric Effect

It does not make the electron eject because each photon needs to have enough energy to make the electron eject. If the photons don't have enough of the energy, having more photons is not going to help.
by Bryce Barbee
Sun Oct 20, 2019 3:27 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Valence electrons
Replies: 4
Views: 34

Re: Valence electrons

The valence electrons include both because valence electrons mean all electrons in the outer shell.
by Bryce Barbee
Sun Oct 13, 2019 7:59 pm
Forum: General Science Questions
Topic: THe mole
Replies: 5
Views: 72

Re: THe mole

I am not completely sure why carbon was chosen but I assumed that it had something to do with the importance of carbon and it's relevance in life in general.
by Bryce Barbee
Sun Oct 13, 2019 7:56 pm
Forum: Photoelectric Effect
Topic: Photoelectric experiment
Replies: 3
Views: 49

Re: Photoelectric experiment

This is because they believed that the higher the intensity the higher the energy but the intensity of the light did not matter if there was not enough energy in the photons that were with the wave.
by Bryce Barbee
Thu Oct 10, 2019 2:43 pm
Forum: Significant Figures
Topic: Conflicting Sig Fig Advice
Replies: 3
Views: 93

Re: Conflicting Sig Fig Advice

I feel like the safest way to do it is to keep your sig figs long throughout the problem and then round at the end in order to get the most precise answer like you said. That's what I've been doing and I feel like you can't go wrong that way.
by Bryce Barbee
Thu Oct 10, 2019 2:34 pm
Forum: Properties of Light
Topic: Waves/Particles
Replies: 14
Views: 164

Re: Waves/Particles

From how I understand it, the photons deliver somewhat of a "package" of energy that allows the electrons to jump to different levels.
by Bryce Barbee
Thu Oct 10, 2019 2:32 pm
Forum: Properties of Electrons
Topic: Photoelectric Effect Experiment
Replies: 5
Views: 54

Re: Photoelectric Effect Experiment

Yes, the light is transferring energy through photons in the photon model of the experiment. I do not completely understand what is happening in the wave model of the experiment though.
by Bryce Barbee
Sun Oct 06, 2019 4:09 pm
Forum: Molarity, Solutions, Dilutions
Topic: Which Volume to use for M1
Replies: 6
Views: 83

Re: Which Volume to use for M1

I always write M1V1 as MiVi to help me remember that those are the initial volumes and molarity for the problems.
by Bryce Barbee
Sun Oct 06, 2019 4:05 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Mole help [ENDORSED]
Replies: 8
Views: 130

Re: Mole help [ENDORSED]

I find it easy to think of moles when I think of them in something other than a chemistry example. When I think about them as strictly just being a unit of measurement for anything, such as fruit, then the idea becomes simpler.
by Bryce Barbee
Sun Oct 06, 2019 4:00 pm
Forum: Limiting Reactant Calculations
Topic: Reviewing High School Chem Tips
Replies: 10
Views: 105

Re: Reviewing High School Chem Tips

I know that Lavelle offers chemistry review sessions led by TA's that are pretty useful, especially for the highschool material.

Go to advanced search