Search found 121 matches
- Sun Mar 15, 2020 7:56 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: le chatelier's principle on temp
- Replies: 4
- Views: 177
Re: le chatelier's principle on temp
Le Chatelier's Principle refers to how chemical reactions adjust to go in the direction that will minimize the effect of changes. This can occur if the physical parameters pressure and temperature are changed. I think you can check using the equation PV=nRT.
- Sun Mar 15, 2020 7:48 am
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: H2O
- Replies: 44
- Views: 335
Re: H2O
You don't include H2O if it is in solid or liquid form. Solids and liquids are not counted in ICE tables.
- Sun Mar 15, 2020 7:45 am
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: R
- Replies: 3
- Views: 107
Re: R
You use the first one (8.314 J/K*mol) because it will allow you to cancel out temperature and Faradays constant, then you would be left with J/C which equals volts.
- Sun Mar 15, 2020 7:33 am
- Forum: Calculating Work of Expansion
- Topic: Integral
- Replies: 9
- Views: 163
Integral
Why does the work of expansion at a constant pressure use volume for the integral?
- Sun Mar 15, 2020 6:18 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Bond Enthalpies and Standard Enthalpies of Formation
- Replies: 2
- Views: 136
Bond Enthalpies and Standard Enthalpies of Formation
What do you plug in to the equations for these methods if you aren't given the
or the
values? How do you use the equation to determine this?
- Sun Mar 15, 2020 2:57 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Including H2O in Cell Diagram
- Replies: 3
- Views: 95
Re: Including H2O in Cell Diagram
Yes, you do not include H2O. In a cell diagram I think the molarity of the aqueous species already shows that there is a liquid involved. In cell notation you also do not include water (the set up is electrode material|aqueous species||aqueous species|electrode material).
- Sun Mar 15, 2020 2:44 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: A
- Replies: 2
- Views: 108
Re: A
Are you referring to the frequency factor? I think it is A=Zp but it is not usually calculated so it is just left as 1.
- Sat Mar 14, 2020 8:50 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Finding enthalpy
- Replies: 2
- Views: 114
Finding enthalpy
Does enthalpy have its own equation or can you only use the three methods to find it (such as Hess's law)?
- Sat Mar 14, 2020 8:45 pm
- Forum: Balancing Redox Reactions
- Topic: changing half reactions
- Replies: 6
- Views: 163
changing half reactions
When the half reactions are both reduction reactions or both oxidization reactions you change one of them by switching them around and changing the sign of the cell potentials right? How do you know which one to change so that they are no longer the same?
- Sat Mar 14, 2020 8:31 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Arrhenius equation and activation energies
- Replies: 2
- Views: 101
Arrhenius equation and activation energies
Does the Arrhenius equation find the activation energy and then could the equation
be used on the activation energy? Also what does exp stand for in the Arrhenius equation?
- Sat Mar 14, 2020 8:22 pm
- Forum: General Rate Laws
- Topic: Steps
- Replies: 2
- Views: 125
Steps
If a step refers to a chemical equation how do you know which step it is from looking at the equation? How can you tell if it is slow or fast? How can you tell if it is an elementary step or a non-elementary step?
- Sat Mar 14, 2020 8:14 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: R and Nernst equation
- Replies: 2
- Views: 136
R and Nernst equation
When using R (the 8.314
version) with the Nernst equation, what should the units be in the end and how do the units cancel out to that? Also could the other variations of R be used in the Nernst equation too?
- Sat Mar 14, 2020 7:47 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Conjugate Seesaw
- Replies: 5
- Views: 158
Re: Conjugate Seesaw
905415863 wrote:Conjugate seesaw has to do with conjugate acids and bases. A weak acid will have a strong conjugate base. A strong acid will have a weak conjugate base. You can see how this is metaphorically related to the idea of a seesaw.
So the conjugate seesaw isn't referring to KAKB=KW?
- Sat Mar 14, 2020 7:26 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: q=qP
- Replies: 3
- Views: 129
q=qP
If q is heat what is qP? What does P stand for? Is it pressure?
- Sat Mar 14, 2020 7:22 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Conjugate Seesaw
- Replies: 5
- Views: 158
Conjugate Seesaw
How do you get from the conjugate seesaw to other equations such as pKA+pKB=pKW to pKW =pH+pOH? Should values for pKA, pKB, and pKW be within 0-14 like pH and pOH?
- Sat Mar 14, 2020 7:14 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kw and other constants
- Replies: 9
- Views: 215
Kw and other constants
What does the subscript w mean in Kw? Why do the acid and base constants multiply to get Kw? Also is it a capital or lowercase W?
- Mon Mar 09, 2020 2:21 am
- Forum: General Rate Laws
- Topic: growth and decay
- Replies: 1
- Views: 49
growth and decay
Is decay just the breaking apart of different elements in a compound? If so does growth look like? Also how do reduction and oxidation relate to these if possible?
- Mon Mar 09, 2020 12:34 am
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: k' vs kr
- Replies: 13
- Views: 205
k' vs kr
What is the difference between k' and
?
- Mon Mar 09, 2020 12:12 am
- Forum: General Rate Laws
- Topic: Integrated Rate Law
- Replies: 3
- Views: 51
Re: Integrated Rate Law
So if it's the instantaneous rate of change, then the differential rate law is the derivative of that and is the regular rate law, then what is the average rate? Is it the second derivative? Is it even the same as the average reaction rate or am I connecting the concepts in the wrong way?
- Sun Mar 08, 2020 11:55 pm
- Forum: General Rate Laws
- Topic: Integrated Rate Law
- Replies: 3
- Views: 51
Integrated Rate Law
Is the integrated rate law instantaneous?
- Sun Mar 08, 2020 11:49 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: reaction rate vs average reaction rate
- Replies: 5
- Views: 145
reaction rate vs average reaction rate
What is the difference between the reaction rate and the average reaction rate if the reaction rate is also considered an average of the change in concentration? Wouldn't they both be the same even if the average reaction rate is measured on an interval?
- Sun Mar 01, 2020 11:30 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Nernst equation and K
- Replies: 3
- Views: 88
Nernst equation and K
When would you use K instead of Q? Does the electron flow stop at equilibrium? If so why use K?
- Sun Mar 01, 2020 11:25 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Electrolytes vs electrodes
- Replies: 5
- Views: 42
Electrolytes vs electrodes
What exactly is the difference between electrolytes and electrodes and do they even relate to each other? Why do they affect voltage differences?
- Sun Mar 01, 2020 11:18 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Voltage
- Replies: 6
- Views: 104
Voltage
When calculating voltage why must there be a plus sign in front of the answer if it is positive? Why is it not the same without the plus sign?
- Sun Mar 01, 2020 11:16 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Half reactions and cell potential
- Replies: 2
- Views: 60
Half reactions and cell potential
What is the purpose of reversing one of the half reactions to change the sign of the cell potential?
- Sun Mar 01, 2020 11:11 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Electromotive force
- Replies: 3
- Views: 69
Electromotive force
Does the electromotive force only include electron flow that goes from left to right (in galvanic cells)? Or is it any direction?
- Sun Mar 01, 2020 11:08 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Direction of flow
- Replies: 5
- Views: 122
Direction of flow
If batteries are designed to flow in one direction, are galvanic cells the same? Can electrons only flow in one direction or can they go both ways? Does the salt bridge make it go both ways?
- Sun Mar 01, 2020 10:59 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Different types of galvanic cells
- Replies: 2
- Views: 63
Different types of galvanic cells
Are there other galvanic cells like concentration cells that have special conditions?
- Sun Mar 01, 2020 10:45 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Amount of products and reactants
- Replies: 2
- Views: 69
Amount of products and reactants
When applying the Nernst equation, why is it better to have less reactants and more products? Is it because of Le Chatelier’s principle? What happens if there are more reactants and less products?
- Sun Mar 01, 2020 10:39 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell notation
- Replies: 2
- Views: 53
Cell notation
When writing equations based off what is given in cell notation, what is the best way to determine which elements to leave out? For example in the standard hydrogen equation, you leave out platinum when but use the rest of the elements.
- Sun Mar 01, 2020 10:34 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Degree symbol
- Replies: 10
- Views: 116
Degree symbol
What does it mean when you put a degree symbol or knot symbol with delta G or any other variable? What is the difference between that and when the symbol is used for temperature?
- Sun Mar 01, 2020 10:29 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: electron flow
- Replies: 4
- Views: 38
electron flow
Is the flow of electrons electricity? Is the term electricity interchangeable with the term electric energy?
- Sat Feb 15, 2020 11:34 pm
- Forum: Balancing Redox Reactions
- Topic: How do you combine half reactions?
- Replies: 4
- Views: 83
How do you combine half reactions?
Do you put all the reactants of each reaction together and all the products of each reaction together?
- Sat Feb 15, 2020 11:31 pm
- Forum: Balancing Redox Reactions
- Topic: simplifying half reactions
- Replies: 3
- Views: 68
simplifying half reactions
When simplifying half reactions what does it mean to cancel out species?
- Sat Feb 15, 2020 11:27 pm
- Forum: Balancing Redox Reactions
- Topic: Balancing Equations Order
- Replies: 2
- Views: 41
Re: Balancing Equations Order
I think when the solution is acidic, you use H+ to balance H in the reaction and when the solution is basic you use H2O to balance H.
- Sat Feb 15, 2020 11:22 pm
- Forum: Van't Hoff Equation
- Topic: T1 and T2
- Replies: 7
- Views: 111
T1 and T2
Why is it lnk1 at T1 and lnk2 at T2? Are both K and T changing?
- Sat Feb 15, 2020 11:16 pm
- Forum: Balancing Redox Reactions
- Topic: Acidic and basic redox reactions
- Replies: 2
- Views: 34
Acidic and basic redox reactions
Why do you need to pay attention to whether or not the solution in a redox reaction is acidic or basic?
- Sat Feb 15, 2020 11:10 pm
- Forum: Balancing Redox Reactions
- Topic: Multiplying by number of elections gained/lost
- Replies: 3
- Views: 90
Multiplying by number of elections gained/lost
Why do we multiply the half-reactions by the number of electrons gained or lost?
- Sat Feb 15, 2020 11:03 pm
- Forum: Balancing Redox Reactions
- Topic: skeletal equations
- Replies: 3
- Views: 59
skeletal equations
In example 6K.1, why is the C2H2O4 turned into H2C2O4?
- Wed Feb 12, 2020 2:47 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Hess Law
- Replies: 6
- Views: 131
Hess Law
How do you do use Hess's law when only the main reaction is given?
- Wed Feb 12, 2020 2:37 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Cubic to quadratic function
- Replies: 4
- Views: 155
Cubic to quadratic function
How do you simplify a cubic function to a quadratic function?
- Wed Feb 12, 2020 1:52 pm
- Forum: Ideal Gases
- Topic: Ideal gases, Cp and Cv
- Replies: 2
- Views: 132
Ideal gases, Cp and Cv
What is the purpose of the fractions multiplied by R? For example Cp= (5/2)R; does this get plugged into
or does it get put into U=3/2 nRT except the 3/2 would be 5/2? Also when do you know if it is Cp or Cv?
- Wed Feb 12, 2020 1:41 pm
- Forum: Calculating Work of Expansion
- Topic: work in reversible reaction
- Replies: 4
- Views: 110
work in reversible reaction
In
what is d? Is it a separate variable or is it dV (the derivative of V) and how do you find it? Also do V1 and V2 represent volume? If they represent volume how do they turn into the number of microstates?
- Sun Feb 09, 2020 4:13 am
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: monoatomic, diatomic, linear, non-linear
- Replies: 3
- Views: 88
monoatomic, diatomic, linear, non-linear
Are these referring to the shape of a molecule? If so why does the shape affect entropy?
- Sun Feb 09, 2020 4:08 am
- Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
- Topic: W
- Replies: 4
- Views: 39
W
Is W just the number of microstates and are microstates just the number of atoms attached to the central atom of a molecule? If so how do you know which molecule you should be basing W on?
- Sun Feb 09, 2020 3:51 am
- Forum: Phase Changes & Related Calculations
- Topic: heat added/released
- Replies: 6
- Views: 66
heat added/released
How do you know whether heat is added or released just by looking at the equation?
- Sun Feb 09, 2020 3:37 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: set up of equation
- Replies: 1
- Views: 50
set up of equation
When creating ice tables, does it matter if the reactants or products are on a certain side (left or right)? When the equation is not given how do you know what side to put the reactants/products?
- Sun Feb 09, 2020 3:29 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: using ICE tables
- Replies: 3
- Views: 116
using ICE tables
Are ICE tables only used to calculate molarity? Or can there be instances where the ICE table will be used to find something other than molarity such as mass, and then the mass would have to be converted into molarity?
- Sun Feb 02, 2020 11:56 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: delta V
- Replies: 4
- Views: 51
delta V
Other than in aqueous solutions, in what other situations would
equal 0?
- Sun Feb 02, 2020 11:42 pm
- Forum: Calculating Work of Expansion
- Topic: piston diagram
- Replies: 2
- Views: 41
Re: piston diagram
I’m not exactly sure what a piston is and how that works in the diagram. A piston is the disk/cylinder looking thing that can move up and down the container and push against or pull away from the system decreasing or increasing pressure and volume. The diagram I'm referring to is the one from the l...
- Sun Feb 02, 2020 11:18 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: "thermodynamic property" and "statistical"
- Replies: 1
- Views: 27
"thermodynamic property" and "statistical"
What are these terms referring to and what do the errors in S and W have to do with them?
- Sun Feb 02, 2020 10:59 pm
- Forum: Calculating Work of Expansion
- Topic: piston diagram
- Replies: 2
- Views: 41
piston diagram
In lecture there was a diagram of three pistons showing how force and internal energy affect how energy increases or decreases in the system; some of the pistons have arrows pointing upwards in the section labeled D which is the change in volume and the change in area (I think). What do these arrows...
- Sun Feb 02, 2020 10:46 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Constant pressure vs constant volume
- Replies: 1
- Views: 43
Constant pressure vs constant volume
Would systems with constant pressure be considered open systems and systems with constant volume be closed systems? If so when would a calorimeter with constant pressure become defined closed or isolated?
- Sun Feb 02, 2020 10:27 pm
- Forum: Calculating Work of Expansion
- Topic: Force
- Replies: 3
- Views: 57
Force
Is force pressure per unit area or pressure times area?
- Sat Jan 25, 2020 11:52 pm
- Forum: Phase Changes & Related Calculations
- Topic: motion of atoms
- Replies: 2
- Views: 24
motion of atoms
What do the orderly and disorderly motion of atoms look like? Wouldn't atoms just have disorderly motion, like how atoms behave in a gas? Or is that not what it is referring to?
- Sat Jan 25, 2020 11:29 pm
- Forum: Phase Changes & Related Calculations
- Topic: Superheating and Supercooling
- Replies: 2
- Views: 29
Superheating and Supercooling
Do superheating and supercooling happen every time something heats up/cools too quickly?
- Sat Jan 25, 2020 11:19 pm
- Forum: Phase Changes & Related Calculations
- Topic: Work
- Replies: 3
- Views: 70
Work
Since work is the opposing force x distance moved what can it affect? What is work not applicable to?
- Sat Jan 25, 2020 11:09 pm
- Forum: Phase Changes & Related Calculations
- Topic: Hess's Law
- Replies: 3
- Views: 43
Hess's Law
When using the Hess's Law method, I know that the
values are added together, but what exactly do you do to the chemical equations given?
- Sat Jan 25, 2020 11:02 pm
- Forum: Phase Changes & Related Calculations
- Topic: Steam vs Water
- Replies: 6
- Views: 61
Steam vs Water
Does steam produce more severe burns than water because it changes phase once it touches your skin? Also how does whether or not the temperature is uniform affect this?
- Sat Jan 18, 2020 11:55 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Buffers
- Replies: 3
- Views: 64
Buffers
When a buffer neutralizes something, does it take or give protons?
- Sat Jan 18, 2020 11:52 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: 5% rule
- Replies: 10
- Views: 163
5% rule
What is the 5% rule and how do you apply it?
- Sat Jan 18, 2020 11:48 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Concentrations
- Replies: 12
- Views: 128
Concentrations
When is concentration the only thing that affects K and when is it not the only thing?
- Sat Jan 18, 2020 11:44 pm
- Forum: Ideal Gases
- Topic: Ideal gas law and [P]/[R]
- Replies: 3
- Views: 57
Ideal gas law and [P]/[R]
When using PV=NRT, would finding the equilibrium constant only apply to pressure? Or could you use [P]/[R] with all the other variables?
- Sat Jan 18, 2020 11:39 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: % protonated
- Replies: 3
- Views: 27
% protonated
When calculating the percent protonated, what is being protonated and when do you need to know if it is protonated?
- Sun Jan 12, 2020 12:33 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Functions
- Replies: 2
- Views: 42
Functions
What determines whether we use a quadratic or a cubic function? Are the exponents determined differently than when the leading coefficients are used for the exponents?
- Sat Jan 11, 2020 10:50 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Where Equilibrium "sits"
- Replies: 2
- Views: 42
Where Equilibrium "sits"
Other than the size of K, does anything else affect whether the equilibrium sits to the left or right?
- Sat Jan 11, 2020 10:47 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Partial pressure
- Replies: 4
- Views: 45
Partial pressure
Is there a difference between partial pressure and just pressure?
- Sat Jan 11, 2020 10:42 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Quadratic Equation
- Replies: 3
- Views: 37
Quadratic Equation
What values correlate with a, b, and c? Also what is the purpose of the quadratic equation? What does it calculate?
- Sat Jan 11, 2020 10:33 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Changes in pressure
- Replies: 3
- Views: 46
Changes in pressure
Does volume affect pressure only when it is decreasing?
- Sat Jan 11, 2020 10:29 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE tables
- Replies: 3
- Views: 64
ICE tables
If the C stands for change, C stands for the change of what? Is it the concentration? How do you determine what goes in the row for C?
- Sat Dec 07, 2019 4:59 pm
- Forum: Hybridization
- Topic: Promoting electrons
- Replies: 1
- Views: 113
Promoting electrons
When do electrons get promoted? For example if there are two electrons in an orbital that have opposite spins and one of them gets moved so that all of them are parallel, when does this happen?
- Wed Dec 04, 2019 3:41 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: pK
- Replies: 2
- Views: 44
pK
What does pK stand for and what's the difference between it and others like pKw, pKa,
,
,
, and
? Also how do you calculate all of these?
- Wed Dec 04, 2019 1:13 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Polydentate ligands
- Replies: 1
- Views: 28
Polydentate ligands
How can you tell if ligands can occupy more than one bonding site?
- Wed Dec 04, 2019 1:09 am
- Forum: Naming
- Topic: Oxidation numbers and charge
- Replies: 1
- Views: 33
Oxidation numbers and charge
How do you determine the oxidation number? Also how do you determine the overall charge of the molecule?
- Sun Dec 01, 2019 11:55 pm
- Forum: Lewis Acids & Bases
- Topic: Lewis acid-base reactions
- Replies: 1
- Views: 36
Lewis acid-base reactions
When writing the equation for Lewis acid-base reactions, do you do anything differently compared to writing the equation of a chemical reaction that isn't an acid-base reaction?
- Sun Dec 01, 2019 11:34 pm
- Forum: Conjugate Acids & Bases
- Topic: Conjugate vs Bronsted acids/bases
- Replies: 4
- Views: 62
Conjugate vs Bronsted acids/bases
Are Bronsted acids and bases the opposite of conjugate acids and bases?
- Wed Nov 27, 2019 9:22 am
- Forum: Dipole Moments
- Topic: Hydrogen Bonding Sites
- Replies: 9
- Views: 207
Hydrogen Bonding Sites
What exactly are hydrogen bonding sites? Are they where hydrogen is just bonded to some element or where hydrogen can potentially bond with an element?
- Wed Nov 27, 2019 9:20 am
- Forum: Dipole Moments
- Topic: H-bonds and H-bonding
- Replies: 2
- Views: 170
H-bonds and H-bonding
What is the difference between hydrogen bonds and hydrogen bonding? For example, if hydrogen bonding (the intermolecular force) only occurs when H bonds with O,N, or F, would those be hydrogen bonds, would hydrogen bonded with an element other than those be a hydrogen bond, or would both kinds be hy...
- Wed Nov 27, 2019 9:14 am
- Forum: Dipole Moments
- Topic: Hydrogen Bonds vs Double Bonds
- Replies: 2
- Views: 70
Hydrogen Bonds vs Double Bonds
What is the difference between two hydrogen bonds and a double bond?
- Wed Nov 27, 2019 9:13 am
- Forum: Dipole Moments
- Topic: Amide vs N-H
- Replies: 2
- Views: 153
Amide vs N-H
Doesn't the double bond in amide already indicate that it has a stronger boiling point than N-H? (Amide has an N single bonded to a C, and then an H single bonded to the N and an O double bonded to the C) I thought that if the molecule has stronger bonds in it like a double or triple bond, it would ...
- Sun Nov 24, 2019 11:57 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: What is a chelating complex?
- Replies: 1
- Views: 26
What is a chelating complex?
Is it just complexes that can form rings?
-dentate
What is the difference between polydentate, bidentate, and ambidentate? What are they referring to when it comes to ligands?
d-metals
Are d-metals just metals with d orbitals? If not what does the d in front mean?
- Sun Nov 24, 2019 11:22 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Complexes
- Replies: 2
- Views: 71
Complexes
Are the central atoms of complexes always a metal atom or ion? Are there cases where it is not a metal?
- Sun Nov 24, 2019 11:03 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Cis vs Trans
- Replies: 22
- Views: 587
Cis vs Trans
What is the difference between the terms cis and trans?
- Sun Nov 17, 2019 12:03 am
- Forum: Electronegativity
- Topic: Symbols for partial charge
- Replies: 4
- Views: 611
Symbols for partial charge
Do
and
represent partial charge? How do you know where to put these symbols and when? Also do the arrows (
) used along with these point from the negative to the positive?
- Sat Nov 16, 2019 11:45 pm
- Forum: Dipole Moments
- Topic: Atom and Molecule Size
- Replies: 1
- Views: 50
Atom and Molecule Size
If the size of the atoms in a molecule affect the strength of intermolecular forces does that mean that the over all size of the molecule can affect the strength of intermolecular forces too? Do they follow the same trends?
- Sat Nov 16, 2019 11:40 pm
- Forum: Lewis Structures
- Topic: Filling out lone pairs
- Replies: 1
- Views: 74
Filling out lone pairs
When drawing Lewis structures do you fill out the outer atoms with lone pairs first and then put the remaining on the central atom? What is the best way to tell if you should put lone pairs on the central atom or if double or triple bonds should be made?
- Sat Nov 16, 2019 11:38 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Partial charges
- Replies: 2
- Views: 164
Partial charges
What's the difference between partial charges and formal charges? How do you calculate partial charges?
- Sat Nov 16, 2019 11:34 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Calculating formal charge
- Replies: 8
- Views: 258
Calculating formal charge
When calculating formal charge, which atoms to you calculate first, the central atom or the surrounding ones? Do you add up all their charges in the end?
- Sat Nov 09, 2019 11:48 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Lone pairs on central atom
- Replies: 3
- Views: 48
Lone pairs on central atom
Do the number of lone pairs on a central atom affect how polar a molecule is?
- Sat Nov 09, 2019 11:45 pm
- Forum: Lewis Structures
- Topic: Lewis structures that are not symmetrical
- Replies: 4
- Views: 127
Lewis structures that are not symmetrical
If a lewis structure has atoms arranged around its central atom non-symmetrically then it is a polar atom right? What draws the line between symmetrical and not symmetrical? For example if there are 5 atoms around the central atom, the atoms could be arranged around it so that it can be either symme...
- Sat Nov 09, 2019 11:26 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Can polar molecules be more polar than another?
- Replies: 5
- Views: 77
Can polar molecules be more polar than another?
How can you tell if they are more polar than another?
- Sat Nov 09, 2019 10:47 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: what is electron distortion?
- Replies: 3
- Views: 68
Re: what is electron distortion?
Atoms have electron clouds and electron distortion is when that cloud gets distorted. Polarizability is how easily an electron cloud can be distorted. So if ions have high electron distortion that means that their electron cloud is distorted easily, and as a result they have high polarizability or h...
- Sat Nov 09, 2019 10:37 pm
- Forum: Bond Lengths & Energies
- Topic: Strongest Bond
- Replies: 15
- Views: 269
Re: Strongest Bond
Longer bonds are weaker and shorter bonds are stronger. Single bonds are the longest so they are the weakest; triple bonds are the shortest so they are the strongest. Double bonds are in the middle with both length and strength.
- Sun Nov 03, 2019 1:05 am
- Forum: Formal Charge and Oxidation Numbers
- Topic: When to calculate formal charge
- Replies: 7
- Views: 127
Re: When to calculate formal charge
I don't think you would have to calculate formal charge all the time, I think it would just be when it is being asked for in a problem. Another instance where you most likely will have to calculate it might be when you have to adjust the lewis structure so that all the atoms are stable at a formal c...
- Sun Nov 03, 2019 12:53 am
- Forum: Electronegativity
- Topic: Ionization energy and electronegativity
- Replies: 8
- Views: 125
Re: Ionization energy and electronegativity
Ionization energy and electron negativity (and electron affinity and atomic radius) are involved in what an atom does to its electrons when it becomes bonded with another atom. They are two different things but they follow the same trend. Ionization energy is the energy required to remove an electro...
- Sun Nov 03, 2019 12:31 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron configurations of ions
- Replies: 4
- Views: 123
Re: Electron configurations of ions
I don't think you have to write them in a certain order; it just depends on what is being asked for. If you are asked for the ground state electron configuration, you just write that out. If it asks for the electron configuration for a cation or anion, you will probably have to write the ground stat...
- Sun Nov 03, 2019 12:20 am
- Forum: Ionic & Covalent Bonds
- Topic: Bond Strength
- Replies: 3
- Views: 42
Re: Bond Strength
It is mainly referring to the size of the atom. The larger the atom the larger the bonds, and the larger the bonds the weaker the bonds are. The smaller the atom the shorter the bonds, and the shorter the bonds the stronger the bonds are. So basically you just have to look at the atomic radius trend...
- Sat Nov 02, 2019 11:25 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Calculator Issues!
- Replies: 3
- Views: 58
Re: Calculator Issues!
I think your problem is that you set the calculator to SCI. SCI makes ALL the calculations in scientific notation. For example if you did 5 x 5, you wouldn't get 25, you would get 2.5x10^-1. I think that this is what would throw your answers off. So change your settings to the default settings. I th...