Search found 100 matches

by 205389184
Sun Mar 08, 2020 11:36 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Half/Rxn & Balanced Equations for galvanic cells.
Replies: 8
Views: 49

Re: Half/Rxn & Balanced Equations for galvanic cells.

we typically add platinum to either (or both) side of the cell diagram if there isn't already an electrode in it
by 205389184
Sun Mar 08, 2020 11:34 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Favoring reactions
Replies: 7
Views: 71

Re: Favoring reactions

The forward reaction will be favored if delta G is negative and vice versa
by 205389184
Sun Mar 08, 2020 11:29 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Adding Pt(s) to a Cell Diagram
Replies: 14
Views: 109

Re: Adding Pt(s) to a Cell Diagram

We add platinum to a cell diagram when there isn't already an electrode to help transport the electrons
by 205389184
Thu Mar 05, 2020 9:41 am
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Combustion of gas
Replies: 6
Views: 95

Combustion of gas

Will the combustion of gas always be spontaneous?
by 205389184
Wed Mar 04, 2020 11:35 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: writing cell diagramsl
Replies: 4
Views: 32

writing cell diagramsl

When writing a cell diagram, do we leave out H2O? if so, is that the only compound we need to not include if given the half reactions?
by 205389184
Wed Mar 04, 2020 9:12 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: cell diagram
Replies: 1
Views: 17

cell diagram

in a given cell diagram, if the pressure of two different compounds is given as 1.0 bar and 1.0 molxL^-1, when we are setting up Q, do we ignore the units or are they the same? (6N.5 part a for reference)
by 205389184
Wed Mar 04, 2020 8:35 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: cell diagrams
Replies: 1
Views: 23

cell diagrams

if a compound appears on both sides of a salt bridge (or the double line), do we not include it in our half reactions? for example in 6N #3 part a and c
by 205389184
Wed Mar 04, 2020 8:02 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Exercise 6N 1b
Replies: 2
Views: 31

Exercise 6N 1b

In exercise 6N 1b, why is n=2 and not n=1? More specifically, in the solutions manual, it gives the reduction half reaction as: In3+ +2e- --> In2+
but in appendix 2B, it only shows one electron in the previous equation
by 205389184
Tue Mar 03, 2020 10:17 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Writing cell diagrams
Replies: 2
Views: 22

Writing cell diagrams

When writing cell diagrams and after having found the cathode and anode half reactions, do we ignore the coefficients of the molecules when putting them into the cell diagram?
by 205389184
Tue Mar 03, 2020 9:50 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Standard Potentials
Replies: 2
Views: 24

Standard Potentials

If the cell potential isn't explicitly given, how do we calculate for it? For example, in 6M 3. (a) Pt(s)|Cr3+ (aq),Cr2+ (aq)||Cu2+ (aq)|Cu(s), the cell potential for Cr is not in the tables of potential values provided, so how do we go about problems like these?
by 205389184
Sun Mar 01, 2020 7:50 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: cell diagrams
Replies: 8
Views: 55

cell diagrams

Will the anode always be on the left and the cathode always on the right or does it depend on the compounds involved?
by 205389184
Sun Mar 01, 2020 7:43 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: electrodes
Replies: 5
Views: 36

electrodes

When an electrolytic cell is missing an electrode, will we always use platinum or does it depend on the other compounds involved?
by 205389184
Sun Mar 01, 2020 7:33 pm
Forum: Balancing Redox Reactions
Topic: basic solution
Replies: 4
Views: 40

basic solution

When we have a basic solution and want to balance the half reactions, would the compounds we use be different than what we use for an acidic solution? For example in an acidic solution, we first add H2O to balance the oxygens and then add H+ ions to balance the hydrogens.
by 205389184
Sun Mar 01, 2020 7:31 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: delta G=-nFE
Replies: 7
Views: 66

delta G=-nFE

If the n in DeltaG=-nFE is not explicitly given, how do we calculate its value?
by 205389184
Sun Mar 01, 2020 7:28 pm
Forum: Balancing Redox Reactions
Topic: oxidizing agents
Replies: 11
Views: 80

oxidizing agents

How come the oxidizing agents are the opposite of what is being oxidized? and the same for the reduction agents
by 205389184
Sun Feb 23, 2020 11:29 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: salt bridge
Replies: 9
Views: 53

Re: salt bridge

the purpose of a salt bridge is to allow electrons to move between the anode and cathode without there being an interruption in the flow
by 205389184
Sun Feb 23, 2020 11:27 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Platinum
Replies: 2
Views: 21

Re: Platinum

platinum is the most common electrode for a half reaction that doesn't already have one for the electrons to travel through.
by 205389184
Sun Feb 23, 2020 11:23 pm
Forum: Balancing Redox Reactions
Topic: Determining direction of flow
Replies: 15
Views: 121

Re: Determining direction of flow

the flow will go from left to right as it goes from anode to cathode, and another way to look at it is that it is going from negative charge to positive charge
by 205389184
Sun Feb 23, 2020 11:20 pm
Forum: Balancing Redox Reactions
Topic: basic solution
Replies: 3
Views: 32

basic solution

what compound do we add if we need for O in a basic solution and why?
by 205389184
Sun Feb 23, 2020 11:19 pm
Forum: Balancing Redox Reactions
Topic: acidic solutions
Replies: 3
Views: 31

acidic solutions

which compound do we use if we need more H in an acidic solution?
by 205389184
Sun Feb 16, 2020 10:25 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Entropy of the System for irreversible expansions
Replies: 7
Views: 148

Re: Entropy of the System for irreversible expansions

Since entropy is a state function, that means the path you take does not matter, so they will technically be the same.
by 205389184
Sun Feb 16, 2020 10:23 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: Is spontaneity determined by entropy or free energy?
Replies: 9
Views: 518

Re: Is spontaneity determined by entropy or free energy?

Even if your value of delta S of the surroundings is greater than zero, the reaction does not have to be spontaneous, but according to the 2nd law of thermodynamics, the process will be spontaneous if delta Stot is a positive value.
by 205389184
Sun Feb 16, 2020 10:19 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Delta S
Replies: 8
Views: 125

Re: Delta S

Delta S is equal to the entropy of the system whereas delta Ssurroundings is the entropy of the surroundings and so delta Stot is the entropy of the surroundings and system added together.
by 205389184
Sun Feb 16, 2020 10:15 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Standard Enthalpies of Formation
Replies: 10
Views: 66

Re: Standard Enthalpies of Formation

Elements that are in their most stable form, such as H2(g) and Fe(s), will have standard enthalpies of formation equal to zero.
by 205389184
Sun Feb 16, 2020 10:10 pm
Forum: Phase Changes & Related Calculations
Topic: Negative Work
Replies: 18
Views: 213

Re: Negative Work

Since the system is doing work, your value should be negative whereas it would be positive if work was being done on the system
by 205389184
Sun Feb 16, 2020 10:06 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Equilibrium
Replies: 15
Views: 107

Re: Equilibrium

Since both the forward and reverse reactions are occurring at the same rate in equilibrium, delta G naught would be equal to zero
by 205389184
Wed Feb 12, 2020 12:03 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Four Cases
Replies: 2
Views: 59

Four Cases

Will we need to know the four cases of the effects of temperature for calculating dG along with the graphs explained and shown in 4J.4?
by 205389184
Tue Feb 11, 2020 10:16 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Boltzmann Formula
Replies: 3
Views: 46

Boltzmann Formula

Will there be any problems on the midterm that requires us to use the Boltzmann formula and to know how to calculate for systems with different numbers of microstates?
by 205389184
Tue Feb 11, 2020 9:49 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Using Eq1
Replies: 1
Views: 45

Using Eq1

When using the first given equation in the book for calculating the change in enthalpy, dS=qrev/T, do we have to know all three of the listed facts also given in the book?
by 205389184
Tue Feb 11, 2020 8:31 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Delta H of vaporization
Replies: 1
Views: 16

Delta H of vaporization

Are the values of Delta H of vaporization typically endothermic or exothermic?
by 205389184
Sun Feb 02, 2020 11:38 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: expansion
Replies: 5
Views: 35

Re: expansion

In terms of thermodynamics, expansion is referring to when the volume of a system increases
by 205389184
Sun Feb 02, 2020 11:34 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Closed vs isolated systems
Replies: 24
Views: 141

Re: Closed vs isolated systems

One of the main differences is that closed systems cannot exchange mass with its surroundings however it can exchange energy, meanwhile isolated systems cannot exchange either.
by 205389184
Sun Feb 02, 2020 11:26 pm
Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
Topic: R constants
Replies: 21
Views: 599

Re: R constants

The value of R we use depends on the units of the problem you are trying to solve.
by 205389184
Sun Feb 02, 2020 11:24 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: Phase change
Replies: 20
Views: 131

Re: Phase change

Delta H would be positive when ice turns to liquid
by 205389184
Sun Feb 02, 2020 11:22 pm
Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
Topic: Constant pressure
Replies: 19
Views: 137

Re: Constant pressure

Yes, you are correct, we are referring to constant pressure
by 205389184
Sun Feb 02, 2020 11:15 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Changing the energy of a system
Replies: 9
Views: 54

Re: Changing the energy of a system

Three ways to change the energy of a system include work, mass flow, and heat.
by 205389184
Sun Feb 02, 2020 11:08 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Cv or Cp
Replies: 5
Views: 296

Re: Cv or Cp

Cp=5/2R is used when you need to find the heat capacity of an ideal gas with a constant pressure and Cv=3/2R is used when you need to find the heat capacity of an ideal gas with a constant volume
by 205389184
Sun Feb 02, 2020 11:07 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Steam burns
Replies: 8
Views: 51

Re: Steam burns

Since steam releases a lot more energy in comparison to regular boiling water, the burn that the steam inflicts is much more severe than that of the boiling water.
by 205389184
Sun Feb 02, 2020 11:03 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: standard enthalpy of formation
Replies: 1
Views: 9

standard enthalpy of formation

Why do elements in their standard states have a standard enthalpy of formation equal to zero?
by 205389184
Sun Feb 02, 2020 11:00 pm
Forum: Calculating Work of Expansion
Topic: temperature
Replies: 7
Views: 50

temperature

Why is the temperature change for celsius and kelvin the same? For example, if delta T was 8 for celsius, why is it also 8 for kelvin?
by 205389184
Sun Jan 26, 2020 8:34 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalpies
Replies: 6
Views: 41

Re: Bond Enthalpies

Dr.Lavelle won't expect us to draw them but he did say that it is quite helpful so it is one way to work through a problem if you get stuck.
by 205389184
Sun Jan 26, 2020 8:29 pm
Forum: Phase Changes & Related Calculations
Topic: enthalpy of phase changes
Replies: 8
Views: 51

enthalpy of phase changes

Will a calculation of the enthalpy of vaporization, fusion, or sublimation ever result in a negative value?
by 205389184
Sun Jan 26, 2020 8:25 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Standard Reaction Enthalpy
Replies: 3
Views: 37

Standard Reaction Enthalpy

How do you calculate the standard reaction enthalpy if the bond enthalpies are not available? Can you please include an example too
by 205389184
Sun Jan 26, 2020 8:23 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Hess's Law
Replies: 4
Views: 23

Re: Hess's Law

I believe the second method that Dr. Lavelle covered in lecture that uses bond enthalpies to calculate the total enthalpy is the least accurate method.
by 205389184
Sun Jan 26, 2020 8:20 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Ka and Kb
Replies: 10
Views: 103

Re: Ka and Kb

No, I believe Ka and Kb values can also apply to strong acids and bases as well as weak ones.
by 205389184
Sun Jan 26, 2020 8:18 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Energy of the reactants
Replies: 6
Views: 30

Re: Energy of the reactants

If the energy of the products is greater than that of the reactants, then it can be said that the reaction is endothermic.
by 205389184
Sun Jan 26, 2020 8:16 pm
Forum: Ideal Gases
Topic: R Constant
Replies: 18
Views: 210

Re: R Constant

There are different values for the constant R but that is only because it depends on the units that are being used, but they will be provided on the equation sheet that is given on the tests.
by 205389184
Sun Jan 26, 2020 8:14 pm
Forum: Phase Changes & Related Calculations
Topic: phase changes
Replies: 2
Views: 34

phase changes

How do we make up for a difference in phases when trying to calculate for the total enthalpy? Can you please give an example, thank you!
by 205389184
Sun Jan 26, 2020 8:07 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: enthalpy changes
Replies: 2
Views: 13

enthalpy changes

Will we have to memorize any of the numbers for the more commonly used elements/compounds?
by 205389184
Sun Jan 26, 2020 7:57 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: percent ionization
Replies: 5
Views: 40

percent ionization

Why does a small percentage of initial make the approximation acceptable?
by 205389184
Sun Jan 12, 2020 9:12 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Calculating for Pressure
Replies: 5
Views: 35

Calculating for Pressure

When trying to calculate the pressure of a substance, is it possible to do so without being given temperature?
by 205389184
Sun Jan 12, 2020 9:10 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Response of Equilibria to Change
Replies: 6
Views: 39

Response of Equilibria to Change

Could somebody explain the quick way to determine a response of equilibria to change? Dr. Lavelle mentioned it in lecture but I hadn't heard of it prior to when he talked about it so I'm still a little confused.
by 205389184
Sun Jan 12, 2020 9:04 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Calculating Q
Replies: 16
Views: 91

Calculating Q

When calculating Q, how come we include aqueous substances?
by 205389184
Sun Jan 12, 2020 9:01 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Partial Pressure
Replies: 3
Views: 37

Partial Pressure

Is it possible to calculate the partial pressure when only given the chemical compound? If so, how?
by 205389184
Sun Jan 12, 2020 8:59 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Partial Pressure
Replies: 19
Views: 109

Partial Pressure

When calculating for the reaction quotient, will the partial pressure be given in a problem or do we have to solve for it?
by 205389184
Sun Dec 01, 2019 11:17 pm
Forum: Naming
Topic: Naming
Replies: 1
Views: 30

Naming

In the example of potassium hexacyanido ferrate (II), would the suffix for iron be different if the charge on the coordination compound was positive?
by 205389184
Sun Dec 01, 2019 11:15 pm
Forum: Naming
Topic: Naming
Replies: 3
Views: 40

Naming

Does the cation always come before the anion? If so, why is that?
by 205389184
Sun Dec 01, 2019 11:13 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Relative Acidity
Replies: 3
Views: 76

Relative Acidity

Can there ever be a case in which the resulting anion is not stable?
by 205389184
Sun Dec 01, 2019 11:12 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Strong Acids
Replies: 3
Views: 62

Strong Acids

Why does a stronger acid have a lower pka value as opposed to a weaker acid?
by 205389184
Sun Dec 01, 2019 11:09 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: Relative Acidity
Replies: 4
Views: 52

Relative Acidity

When in reference to relative acidity, what does charge delocalization stabilize? Dr.Lavelle mentioned this in lecture but I was not able to hear the rest of the sentence.
by 205389184
Sun Nov 24, 2019 11:59 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligand
Replies: 10
Views: 82

Re: Ligand

A molecule that is attached to the central metal
by 205389184
Sun Nov 24, 2019 11:58 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: question
Replies: 1
Views: 28

question

Will we need to be familiar with density isosurface and electrostatic potential surface for the class?
by 205389184
Sun Nov 24, 2019 11:55 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: bonds
Replies: 2
Views: 80

bonds

How can a poly atomic molecule be nonpolar if it’s bonds are polar?
by 205389184
Sun Nov 24, 2019 11:53 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: energy
Replies: 1
Views: 28

energy

Why is the energy the lowest if the atoms bounded to the central atom are far from lone pairs?
by 205389184
Sun Nov 24, 2019 11:53 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR formula
Replies: 5
Views: 35

VSEPR formula

If we are able to determine the shape of a molecule with the VSEPR formula, but not the angles, will we need to know how to calculate for the angles?
by 205389184
Sun Nov 17, 2019 11:09 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: VSEPR notation
Replies: 6
Views: 83

Re: VSEPR notation

Yes, those VSEPR notations are correct and I believe the corresponding shapes would be tetrahedral and trigonal pyramidal (correct me if I am wrong please).
by 205389184
Sun Nov 17, 2019 11:02 pm
Forum: Hybridization
Topic: Pi and Sigma Bonds
Replies: 17
Views: 411

Re: Pi and Sigma Bonds

For a double bond, there is 1 sigma bond and 1 pi bond and for a triple bond, there is 1 sigma bond and 2 pi bonds.
by 205389184
Sun Nov 17, 2019 10:37 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Vsepr Rules
Replies: 2
Views: 54

Vsepr Rules

What does the second vsepr rule tell us?
by 205389184
Sun Nov 17, 2019 10:36 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: types of bonds
Replies: 14
Views: 422

Re: types of bonds

Yes, a triple bond has 1 sigma bond and 2 pi bonds whereas a single bond has 1 sigma bond and a double bond has one sigma bond and one pi bond.
by 205389184
Sun Nov 17, 2019 10:35 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: Sigma and Pi Bonds
Replies: 15
Views: 204

Sigma and Pi Bonds

In a triple bond, does it matter the order in which the sigma and pi bonds are?
by 205389184
Sun Nov 17, 2019 10:32 pm
Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
Topic: AXE
Replies: 5
Views: 62

Re: AXE

The AXE formula is quite helpful in determining the shape of a molecule and the shortcuts Dr. Lavelle taught us is even more helpful.
by 205389184
Sun Nov 17, 2019 10:07 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Drawing molecules
Replies: 12
Views: 122

Re: Drawing molecules

While it might not be necessary to draw the molecules, it might be helpful in determining the shape and bond angles of the molecule.
by 205389184
Sun Nov 17, 2019 10:03 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Lone Pairs
Replies: 10
Views: 70

Re: Lone Pairs

Since lone pairs result in repulsion of the atoms in the molecule, the geometry of the molecule will be affected.
by 205389184
Sun Nov 17, 2019 10:00 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: vsepr angles
Replies: 10
Views: 69

Re: vsepr angles

I think it would be best to memorize both the bond angles and the shapes, especially for the upcoming test.
by 205389184
Sun Nov 17, 2019 9:59 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: dipole moments
Replies: 11
Views: 72

Re: dipole moments

When the dipoles are facing opposite directions, they will cancel out.
by 205389184
Sun Nov 17, 2019 9:56 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Shapes
Replies: 5
Views: 49

Shapes

How do we determine the shape of a molecule that has more than one central atom?
by 205389184
Sun Nov 10, 2019 10:25 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: Polar Covalent VS Ionic
Replies: 11
Views: 96

Re: Polar Covalent VS Ionic

The difference in electronegativity levels will allow you to distinguish what type of bond it is.
by 205389184
Sun Nov 10, 2019 10:22 pm
Forum: Sigma & Pi Bonds
Topic: Triple bond?
Replies: 18
Views: 662

Re: Triple bond?

In the case of a triple bond, there should be a single sigma bond and two pi bonds.
by 205389184
Sun Nov 10, 2019 10:21 pm
Forum: Sigma & Pi Bonds
Topic: Quantum Numbers
Replies: 9
Views: 103

Re: Quantum Numbers

Knowing the quantum numbers of an orbital will allow you to recognize the energy levels of each.
by 205389184
Sun Nov 10, 2019 10:19 pm
Forum: Octet Exceptions
Topic: electron number in octet
Replies: 8
Views: 178

Re: electron number in octet

The number of electrons that a molecule with an expanded octet can have is dependent on the type of element it is.
by 205389184
Sun Nov 10, 2019 10:17 pm
Forum: Lewis Structures
Topic: Bonds
Replies: 4
Views: 40

Bonds

What must we take into consideration if we are trying to use double or triple bonds?
by 205389184
Sun Nov 10, 2019 10:16 pm
Forum: Dipole Moments
Topic: Dipole
Replies: 1
Views: 22

Dipole

To what extent should we familiarize ourselves with anything concerning dipoles?
by 205389184
Sun Nov 10, 2019 10:12 pm
Forum: Ionic & Covalent Bonds
Topic: Bond Strength
Replies: 3
Views: 35

Bond Strength

Why are ionic bonds typically stronger than covalent bonds?
by 205389184
Sun Nov 10, 2019 10:10 pm
Forum: Lewis Structures
Topic: Lewis Dot Structures
Replies: 7
Views: 87

Lewis Dot Structures

If an element has an odd number of electrons, does it matter which side of the element shorthand we put it on?
by 205389184
Sun Nov 10, 2019 10:06 pm
Forum: Electronegativity
Topic: Electronegativity
Replies: 5
Views: 39

Electronegativity

What does an element’s valence electrons determine in terms of its electronegativity?
by 205389184
Mon Nov 04, 2019 1:09 am
Forum: Quantum Numbers and The H-Atom
Topic: Quantum Numbers
Replies: 6
Views: 162

Quantum Numbers

I am having a bit trouble understanding the concept behind the quantum number ms. How do we determine this value?
by 205389184
Mon Nov 04, 2019 1:08 am
Forum: Dipole Moments
Topic: Polar Covalent Bonds
Replies: 2
Views: 29

Polar Covalent Bonds

Why is it that the electrons in covalent bonds are not equally shared?
by 205389184
Mon Nov 04, 2019 1:06 am
Forum: Dipole Moments
Topic: Ion and Molecule Interactions
Replies: 2
Views: 28

Ion and Molecule Interactions

Will we have to memorize each kJ.mol^-1 value for the interactions that give rise to attractive forces?
by 205389184
Mon Nov 04, 2019 1:02 am
Forum: Electronegativity
Topic: Trend of Electronegativity
Replies: 22
Views: 214

Trend of Electronegativity

In what way should we describe the trends of electronegativity?
by 205389184
Mon Nov 04, 2019 1:01 am
Forum: Lewis Structures
Topic: Lewis Dot Structures
Replies: 4
Views: 47

Lewis Dot Structures

In a Lewis dot structure, if an element were to have 4 dots, would we arrange them in such a way that there is one dot on each side of the element shorthand or would we arrange them so that two sides of the element’s shorthand has a pair of dots?
by 205389184
Sun Oct 27, 2019 6:30 pm
Forum: Properties of Electrons
Topic: Mass of an Electron
Replies: 14
Views: 205

Re: Mass of an Electron

Since the mass of an electron does not vary depending on the element, it is known to have a set mass of 9.109 x 10^-31 kg, which is also considered a constant.
by 205389184
Sun Oct 27, 2019 6:25 pm
Forum: Properties of Electrons
Topic: Chemical bonds
Replies: 2
Views: 52

Chemical bonds

Can somebody explain the difference in formation of ionic compounds and forming a molecule because the notes say that both have to do with achieving the lowest energy.
by 205389184
Sun Oct 27, 2019 6:15 pm
Forum: Properties of Electrons
Topic: Electron resonance
Replies: 2
Views: 41

Electron resonance

What does it mean for an electron that is involved in resonance structures to be delocalized?
by 205389184
Sun Oct 27, 2019 6:10 pm
Forum: Properties of Electrons
Topic: Electron removal
Replies: 11
Views: 131

Electron removal

Why are electrons that are further away from the nucleus easier to remove?
by 205389184
Sun Oct 27, 2019 6:05 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: p-orbitals
Replies: 11
Views: 105

p-orbitals

Would we have to write out all the p-orbital values or can we keep it simplified? Example: N: 1s^2 2s^2 2px^1 2py^1 2pz^1, or can we just write it as 1s^2 2s^2 2p^3?
by 205389184
Sun Oct 13, 2019 11:38 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Class example
Replies: 2
Views: 24

Class example

In the example done in class on October 9th, we calculated for the change in energy for the electron and we got a negative answer, however, when we used that value to calculate the frequency of the light, it was positive. Why was wasn’t the negative sign included?
by 205389184
Sun Oct 13, 2019 11:31 pm
Forum: Photoelectric Effect
Topic: Threshold and activation energy
Replies: 3
Views: 57

Threshold and activation energy

Why is the threshold energy greater than the activation energy?
by 205389184
Sun Oct 13, 2019 11:24 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Electron properties
Replies: 1
Views: 25

Electron properties

Why does having wavelike properties prevent the electron from collapsing down to the nucleus?
by 205389184
Sun Oct 13, 2019 11:22 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Rydberg equation [ENDORSED]
Replies: 73
Views: 3115

Re: Rydberg equation [ENDORSED]

If we are given a problem where we must calculate ΔE using empirical equation for a hydrogen atom, must we memorize Rydberg’s constant or can we determine the answer by other means?
by 205389184
Sun Oct 13, 2019 11:15 pm
Forum: Properties of Light
Topic: Intensity & Amplitude
Replies: 7
Views: 122

Re: Intensity & Amplitude

Since the intensity of light is proportional to the square of its amplitude, if the amplitude were to increase, so would the intensity.

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