Search found 101 matches
- Sun Mar 15, 2020 7:56 am
- Forum: First Order Reactions
- Topic: order of a reaction
- Replies: 6
- Views: 442
order of a reaction
Can you tell what the order of a reaction is just by looking at it? If so, how?
- Sun Mar 15, 2020 7:54 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: adding platinum
- Replies: 8
- Views: 538
adding platinum
How can you tell if a cell diagram needs an inert metallic component?
- Sun Mar 15, 2020 7:52 am
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: spontaneity
- Replies: 4
- Views: 468
spontaneity
How do you know when the reaction is spontaneous to form either reactants or products?
- Sun Mar 15, 2020 7:50 am
- Forum: Phase Changes & Related Calculations
- Topic: state functions
- Replies: 13
- Views: 1319
state functions
What are state functions and what are not state functions?
- Sun Mar 15, 2020 7:49 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: le chatelier's principle on temp
- Replies: 4
- Views: 470
le chatelier's principle on temp
What does the principle say about temperature? Like if it's endothermic or exothermic?
- Sun Mar 08, 2020 11:34 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: intermediate species
- Replies: 4
- Views: 348
intermediate species
How do you determine what the intermediate species is?
- Sun Mar 08, 2020 11:32 pm
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: differential rate law to integrated rate law
- Replies: 3
- Views: 296
differential rate law to integrated rate law
Why is it useful/necessary to change a differential rate law to an integrated rate law?
- Sun Mar 08, 2020 11:31 pm
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: different explanation of method
- Replies: 2
- Views: 253
different explanation of method
In lecture we used an example of using the method of initial rates to determine k and n, but can someone describe in words how to use this method?
- Sun Mar 08, 2020 5:40 pm
- Forum: Second Order Reactions
- Topic: half life
- Replies: 6
- Views: 346
half life
How does half life of a reaction relate to kinetics?
- Mon Mar 02, 2020 4:35 pm
- Forum: Balancing Redox Reactions
- Topic: reversing the anode or cathode reaction [ENDORSED]
- Replies: 5
- Views: 446
reversing the anode or cathode reaction [ENDORSED]
How do you know when to reverse the reaction for the anode or the cathode? For reference I'm looking at the solution to 6L.3 part e.
- Sun Mar 01, 2020 11:52 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: calomel electrode
- Replies: 1
- Views: 150
calomel electrode
What is a calomel electrode and what are some applications for one?
- Sun Mar 01, 2020 11:50 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: equilibrium constant from standard potentials
- Replies: 1
- Views: 226
equilibrium constant from standard potentials
How do you calculate the equilibrium constant of a reaction from standard potentials?
- Sun Mar 01, 2020 2:34 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: finding n
- Replies: 6
- Views: 425
finding n
How do you find n from an equation for a reaction?
- Sun Mar 01, 2020 2:17 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: salt bridge
- Replies: 11
- Views: 654
salt bridge
What is the purpose of a salt bridge?
- Mon Feb 24, 2020 6:11 pm
- Forum: Balancing Redox Reactions
- Topic: 6K.3
- Replies: 1
- Views: 143
6K.3
For problem 6K.3, where did the 8 electrons come from on the balanced oxidation reaction?
- Sat Feb 22, 2020 10:23 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: electrochemical series
- Replies: 4
- Views: 336
electrochemical series
What is meant by the electrochemical series?
- Sat Feb 22, 2020 10:21 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: determining if a metal will dissolve in a solution
- Replies: 2
- Views: 1020
determining if a metal will dissolve in a solution
How do you know if a metal will dissolve in a solution?
- Sat Feb 22, 2020 10:20 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: single line in cell diagram
- Replies: 3
- Views: 209
single line in cell diagram
If I'm looking at a typical picture of reaction in a galvanic cell, what would be the corresponding part to the single line(s) in a cell diagram?
- Sat Feb 22, 2020 10:16 pm
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: rust
- Replies: 9
- Views: 700
rust
How does what we're learning in lecture apply to rust?
- Sat Feb 22, 2020 10:15 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: work and cell potential
- Replies: 4
- Views: 200
work and cell potential
What is the relationship between work and cell potential?
- Sun Feb 16, 2020 1:22 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: signs of G with different values of K
- Replies: 3
- Views: 196
signs of G with different values of K
Why is delta G positive when K is less than one and vice versa?
- Sun Feb 16, 2020 1:19 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: relationship between delta G and K
- Replies: 2
- Views: 177
relationship between delta G and K
What is the relationship between delta G and the equilibrium constant?
- Wed Feb 12, 2020 11:26 am
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: 3/2R & 5/2R
- Replies: 9
- Views: 669
3/2R & 5/2R
Which is equation(s) would you be solving that uses Cv or Cp?
- Wed Feb 12, 2020 10:51 am
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Reversible and irreversible
- Replies: 3
- Views: 234
Re: Reversible and irreversible
With a reversible pathway, the temperature is constant, volume increases, and pressure decreases. With a reversible process, you can use delta S= rev/T. There is more work done, which can be calculated using w= -nRTln(V2/V1). With an irreversible pathway, temperature will change (decrease then incre...
- Tue Feb 11, 2020 10:28 am
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: entropy of irreversible path
- Replies: 2
- Views: 174
entropy of irreversible path
How do you calculate entropy for an irreversible path?
- Sun Feb 09, 2020 9:45 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: conditions for free expansion?
- Replies: 3
- Views: 117
conditions for free expansion?
under what conditions does free expansion occur?
- Sun Feb 09, 2020 9:42 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: heat capacities and enthalpy of phase changes
- Replies: 2
- Views: 196
heat capacities and enthalpy of phase changes
What is the relationship between heat capacity equation and enthalpy of phase change equations? Some questions don't give you, for example, the enthalpy of vaporization and liquid, so what do you do to calculate the enthalpy of of vaporization? Do you use the heat capacity equation?
- Sun Feb 09, 2020 9:38 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: use for a calorimeter?
- Replies: 2
- Views: 74
use for a calorimeter?
What kinds of reactions would a calorimeter be used for?
- Sun Feb 09, 2020 9:04 pm
- Forum: Phase Changes & Related Calculations
- Topic: closed vs isolated
- Replies: 10
- Views: 513
closed vs isolated
what is the difference between a closed system and an isolated system?
- Fri Feb 07, 2020 4:45 pm
- Forum: Phase Changes & Related Calculations
- Topic: relationship between heat capacity and heating curve
- Replies: 6
- Views: 234
relationship between heat capacity and heating curve
The book says that the steeper the slope on a heating curve, the lower is the heat capacity. I'm having trouble understanding this concept, so can someone please explain it? Thanks!
- Sun Feb 02, 2020 10:07 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Biological reactions
- Replies: 1
- Views: 62
Biological reactions
Why do biological reactions occur at a constant pressure?
- Sun Feb 02, 2020 10:06 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: degeneracy
- Replies: 17
- Views: 598
degeneracy
What is the importance of degeneracy in relation to thermodynamics?
- Sun Feb 02, 2020 10:02 pm
- Forum: Calculating Work of Expansion
- Topic: -PdeltaV
- Replies: 2
- Views: 76
-PdeltaV
Why is this equation negative?
- Sun Feb 02, 2020 9:59 pm
- Forum: Calculating Work of Expansion
- Topic: Enthalpy
- Replies: 5
- Views: 147
Enthalpy
What does it mean to say that enthalpy is additive because it is a state function? I know this is Hess's Law, but I'm confused conceptually.
- Sun Feb 02, 2020 9:57 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Steam burns
- Replies: 8
- Views: 261
Steam burns
Why, conceptually, does steam cause severe burns?
- Sun Jan 26, 2020 8:50 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Bond Enthalpies
- Replies: 2
- Views: 119
Re: Bond Enthalpies
I don't know if we'll ever have to calculate them, but so far he's given all of them to us.
- Sun Jan 26, 2020 8:49 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Bond Enthalpies
- Replies: 3
- Views: 122
Re: Bond Enthalpies
For all the examples, the H values were given, so I don't believe we'll be expected to find them unless we go over that later in the unit.
- Sun Jan 26, 2020 8:47 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Method 3
- Replies: 3
- Views: 172
Re: Method 3
What does Method 3 mean/ how can it be used? In lecture Professor Lavelle said to only use it when bond enthalpies aren't available but the example he used was a bit confusing for me to understand now that I look back. Can someone please explain this to me? Thank you! Yes please and can someone bre...
- Sun Jan 26, 2020 8:44 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Exothermic and Endothermic
- Replies: 11
- Views: 728
Re: Exothermic and Endothermic
When a reaction releases energy, or when it is exothermic, the value is negative. When the reaction absorbs energy, or is endothermic, the value is positive.
- Sun Jan 26, 2020 8:43 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Hess's Law
- Replies: 4
- Views: 146
Re: Hess's Law
I believe it's just the first one.
- Mon Jan 20, 2020 12:33 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Pressure changes
- Replies: 7
- Views: 188
Pressure changes
Let's say that the partial pressure of a reactant was increased. How do you use Le Chatelier's principle/reasoning to predict and understand what happens?
- Mon Jan 20, 2020 12:30 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Osmotic pressure [ENDORSED]
- Replies: 1
- Views: 151
Osmotic pressure [ENDORSED]
What is the example of osmotic pressure that we need to know? It says we should know it on the chemical equilibrium outline.
- Mon Jan 20, 2020 12:30 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ATP hydrolysis [ENDORSED]
- Replies: 3
- Views: 103
ATP hydrolysis [ENDORSED]
On the outline, it says to know the biological example of ATP hydrolysis for chemical equilibrium. What is this example?
- Sat Jan 18, 2020 3:44 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Eq. constants & solubility
- Replies: 3
- Views: 163
Eq. constants & solubility
How do you use equilibrium constants to predict solubility?
- Fri Jan 17, 2020 5:29 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: pH for weak acids
- Replies: 5
- Views: 432
pH for weak acids
Why do solutions of weak acids have higher pH values than solutions of strong acids at the
same concentration?
same concentration?
- Sun Jan 12, 2020 9:44 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Concentration affecting equilibrium
- Replies: 5
- Views: 190
Concentration affecting equilibrium
How does changing concentration of the products affect an equilibrium reaction?
- Sun Jan 12, 2020 9:39 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: "quick" way?
- Replies: 4
- Views: 167
"quick" way?
What did Dr. Lavelle mean by the "quick way" of using Le Chatelier's Principle and what is the long way?
- Sat Jan 11, 2020 4:16 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Significance of principle
- Replies: 6
- Views: 311
Significance of principle
What is the significance of Le Chatelier's Principle? How does it also apply to changing physical parameters?
- Sat Jan 11, 2020 3:23 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: finding change in concentration in ICE tables
- Replies: 3
- Views: 218
finding change in concentration in ICE tables
How do you figure out what the change in concentration is if you only have the initial concentration and the balanced equation? For instance, if you have the equation CO(g) + H2O(g) --> CO2(g) + H2(g) and the initial concentration of both of the reactants is 0.1M, how do you find the change in conce...
- Fri Jan 10, 2020 12:31 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: using Kp vs Kc
- Replies: 13
- Views: 1525
using Kp vs Kc
If all the reactants and products are in the gas phase, do you have to use Kp? Or can you use Kc?
- Sat Dec 07, 2019 6:43 pm
- Forum: Properties of Light
- Topic: relationship between frequency and intensity?
- Replies: 3
- Views: 233
relationship between frequency and intensity?
What is the relationship between frequency and intensity?
- Sat Dec 07, 2019 6:36 pm
- Forum: Biological Examples
- Topic: Final
- Replies: 6
- Views: 482
Re: Final
Naji Sarsam 4G wrote:The hydrogen bonding od DNA Base pairs, heme as a coordination compound, cisplatin for chemotherapy, vitamins as acceptors of dangerous radicals, the role of carbon dioxide in blood ph
These are the examples i can think of
can you elaborate on the vitamins?
- Sat Dec 07, 2019 6:33 pm
- Forum: Biological Examples
- Topic: chelating
- Replies: 2
- Views: 227
chelating
can you tell if a compound is a chelate just by looking at it?
- Sat Dec 07, 2019 6:30 pm
- Forum: Hybridization
- Topic: hybridization of lone pairs
- Replies: 1
- Views: 143
hybridization of lone pairs
how do you find hybridization of lone pairs?
- Sat Dec 07, 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: example of dipole induced dipole
- Replies: 1
- Views: 231
example of dipole induced dipole
Hi! Can someone please explain dipole induced dipole and how it's different from other forces along with an example?
- Sun Dec 01, 2019 6:25 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Relative acidity
- Replies: 7
- Views: 511
Relative acidity
What are the properties that determine how strong an acid is? Why is HI a stronger acid than HF?
- Sun Dec 01, 2019 6:22 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: equation breakdown
- Replies: 2
- Views: 86
equation breakdown
Can someone please explain all the parts of the pH equation?
- Sun Dec 01, 2019 6:04 pm
- Forum: Biological Examples
- Topic: EDTA
- Replies: 3
- Views: 173
EDTA
What is the biological significance of EDTA?
- Sun Dec 01, 2019 5:52 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: coordination compound
- Replies: 1
- Views: 140
Re: coordination compound
If a compound is outside of the coordination sphere, that means that that compound is not directly attached to the metal or central atom. When drawing, do not attach the compound to the central atom.
- Sun Dec 01, 2019 5:37 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Chelate and polydentate
- Replies: 2
- Views: 140
Re: Chelate and polydentate
Relating to the chelate part of your question, a chelate is a complex containing a ligand that forms a ring of atoms that includes the central metal atom. Chelating ligands bind cations tightly and are significant in nature especially. For example, the book discusses how chelating ligands lie behind...
- Sun Nov 24, 2019 8:52 pm
- Forum: Biological Examples
- Topic: Heme complex and biological significance
- Replies: 2
- Views: 226
Heme complex and biological significance
What is a heme complex? What is the biological significance of heme complexes?
- Sun Nov 24, 2019 8:44 pm
- Forum: Biological Examples
- Topic: Biological Significance
- Replies: 3
- Views: 256
Re: Biological Significance
Transition metals have many oxidation states, so they are good for electron transfer.
- Sun Nov 24, 2019 8:38 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Ligands
- Replies: 5
- Views: 330
Re: Ligands
In order to find the oxidation state of a transition metal, find the charges of the atoms around the central atom. Whatever those charges add up to, subtract that from the formal charge of the molecule as a whole. So for example if the formal charge of the molecule was neutral and the surrounding at...
- Sun Nov 24, 2019 8:33 pm
- Forum: Lewis Acids & Bases
- Topic: Lewis acids + bases and Bronsted acids + bases
- Replies: 6
- Views: 446
Lewis acids + bases and Bronsted acids + bases
What is the difference between Lewis acids + bases and Bronsted acids + bases?
- Sun Nov 24, 2019 8:29 pm
- Forum: Naming
- Topic: Meaning of Cis and Trans
- Replies: 11
- Views: 852
Re: Meaning of Cis and Trans
Cis means that the electronegative atoms around the central atom are all on the same side. This means it’s polar. Trans means that the atoms around the central atom are opposite each other, making it symmetrical and nonpolar. Cisplatin is a well-known chemotherapy drug that forms a coordination comp...
- Mon Nov 18, 2019 9:43 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: Determining the greater boiling point
- Replies: 4
- Views: 218
Determining the greater boiling point
When trying to find which molecule has a greater boiling point, which factors should be considered first/weighted the most in solving? Electronegativity? Molar mass/size? Etc?
- Sun Nov 17, 2019 4:53 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 7th edition 2E #5 clarification
- Replies: 2
- Views: 170
Re: 7th edition 2E #5 clarification
Hi! Okay so there are only two leftover electrons because the molecule has a +1 charge. Cl is therefore surrounded by 3 "things," aka regions of electron density (one for each double bond to oxygen and one for the lone pair on Cl). The lone pair on Cl makes it trigonal planar. Hope that cl...
- Sun Nov 17, 2019 4:49 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 2E.19 b
- Replies: 2
- Views: 141
2E.19 b
b) (CH3)2Be
I drew the Lewis structure no problem, but why is the shape tetrahedral?
I drew the Lewis structure no problem, but why is the shape tetrahedral?
- Sun Nov 17, 2019 4:46 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 2E. 11
- Replies: 2
- Views: 196
Re: 2E. 11
a) AX4E
- seesaw
b) AX3E2
- T-shaped
c) AX4E2
- square planar
d) AX3E
- trigonal pyramidal
- seesaw
b) AX3E2
- T-shaped
c) AX4E2
- square planar
d) AX3E
- trigonal pyramidal
- Sun Nov 17, 2019 4:42 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: 2E. 7
- Replies: 1
- Views: 147
Re: 2E. 7
a) The shape is trigonal pyramidal because there are four regions of electron density. 3 of those are bonds between atoms and the fourth is a lone pair. b) All the OSCl angles are the same because the lone pair pushes away the bonded pairs equally. c) the angles are >109.5
- Tue Nov 12, 2019 11:16 am
- Forum: Dipole Moments
- Topic: London forces
- Replies: 4
- Views: 246
London forces
Why do London forces act between all molecules rather than just between nonpolar molecules?
- Sun Nov 10, 2019 9:22 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: Strengths of bonds
- Replies: 3
- Views: 250
Re: Strengths of bonds
Another factor that affects bond strength is delocalization (related to resonance as said above).
- Sun Nov 10, 2019 9:17 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: Electron distortion
- Replies: 4
- Views: 238
Electron distortion
So electron distortion is proportional to the polarizability of electrons. What does electron distortion really mean?
- Sun Nov 10, 2019 9:15 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: Fluctuating electron distribution
- Replies: 1
- Views: 114
Fluctuating electron distribution
Why does fluctuating electron distribution result in fluctuating dipoles?
- Sun Nov 10, 2019 9:12 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: Relationship between size of atom and bond strength
- Replies: 2
- Views: 77
Relationship between size of atom and bond strength
So in lecture we talked about how larger atoms/ atoms with higher molar mass have stronger attractive interactions, so does that help explain why, for example, F subscript 2 is a gas at room temp while I subscript 2 is a solid? The bigger the atom --> the stronger the bond --> the more solid it is a...
- Sun Nov 10, 2019 9:07 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: Hydrogen bonding
- Replies: 7
- Views: 393
Re: Hydrogen bonding
Also, Hydrogen bonding helps explain higher melting points.
- Sun Nov 03, 2019 11:12 pm
- Forum: Lewis Structures
- Topic: central atom
- Replies: 16
- Views: 2143
Re: central atom
Also, Hydrogen will never be the central atom just fyi!
- Sun Nov 03, 2019 10:32 pm
- Forum: Trends in The Periodic Table
- Topic: Electron affinity vs electronegativity
- Replies: 7
- Views: 264
Electron affinity vs electronegativity
What is the difference between electron affinity and electronegativity?
- Sun Nov 03, 2019 10:10 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Formal names for each letter
- Replies: 5
- Views: 286
Formal names for each letter
Does anyone have an easy way to remember the full names for n, l, and ml?
- Sun Nov 03, 2019 10:05 pm
- Forum: DeBroglie Equation
- Topic: Does something have wavelike properties?
- Replies: 3
- Views: 108
Re: Does something have wavelike properties?
^ yes I believe anything less than that would be undetectable and too small to be considered having wave-like properties.
- Sun Nov 03, 2019 10:00 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Easier way to calculate/remember?
- Replies: 7
- Views: 370
Easier way to calculate/remember?
Is there an easier way to calculate this/remember it/shortcut?
- Sun Oct 27, 2019 9:33 pm
- Forum: Lewis Structures
- Topic: Hybridization
- Replies: 2
- Views: 84
Hybridization
What is hybridization of the central atom?
- Sun Oct 27, 2019 9:32 pm
- Forum: Lewis Structures
- Topic: VSEPR: E in AXE
- Replies: 2
- Views: 103
VSEPR: E in AXE
What does the E stand for in AXE?
- Sun Oct 27, 2019 9:29 pm
- Forum: Bond Lengths & Energies
- Topic: bond lengths for single or double bonds
- Replies: 7
- Views: 412
Re: bond lengths for single or double bonds
Triple bonds are shorter than both double bonds and single bonds, but they are stronger than both of those. Single bonds are longer than both double and triple bonds, but are also weaker than both of those.
- Sun Oct 27, 2019 9:23 pm
- Forum: Lewis Structures
- Topic: Choosing the central atom
- Replies: 16
- Views: 736
Re: Choosing the central atom
He also mentioned that hydrogen will never be the central atom. Just something to remember!
- Sun Oct 27, 2019 9:21 pm
- Forum: Trends in The Periodic Table
- Topic: Electronegativity vs. effective nuclear charge
- Replies: 5
- Views: 2022
Electronegativity vs. effective nuclear charge
What is the difference between electronegativity and effective nuclear charge?
- Sun Oct 20, 2019 9:56 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Exceptions
- Replies: 2
- Views: 103
Exceptions
So i know the exceptions to normal electron configuration, but why are these elements structured the way they are?
- Sun Oct 20, 2019 9:46 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Stern & Gerlach Experiment
- Replies: 3
- Views: 229
Re: Stern & Gerlach Experiment
^ Just to add, m sub s can either be +1/2 or -1/2. If it is positive, the electron is spin up and if it is negative, the electron is spin down.
- Sun Oct 20, 2019 9:38 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Planes
- Replies: 3
- Views: 89
Planes
When an electron is located in specific planes, what does that mean?
- Sun Oct 20, 2019 9:22 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: M Value
- Replies: 3
- Views: 127
Re: M Value
To add, there are 2l + 1 different values for m sub l.
- Sun Oct 20, 2019 9:06 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Incorrect atomic model example
- Replies: 3
- Views: 130
Incorrect atomic model example
The example from lecture resulted in the velocity of the electron being greater than the speed of light. Obviously this is not possible, but what does that unrealistic answer tell us about the electron? Something about being localized at the nucleus?
- Sun Oct 13, 2019 10:24 pm
- Forum: DeBroglie Equation
- Topic: Diffraction
- Replies: 4
- Views: 252
Diffraction
What exactly is diffraction?
- Sun Oct 13, 2019 10:22 pm
- Forum: DeBroglie Equation
- Topic: Context for this equation
- Replies: 1
- Views: 80
Context for this equation
Can someone give a little for context for when to actually use this equation?
- Sun Oct 13, 2019 10:18 pm
- Forum: Properties of Electrons
- Topic: Energy levels
- Replies: 4
- Views: 120
Energy levels
In reference to electrons being excited and jumping to higher energy levels, is there a specific number of levels each element has? Or is the number of energy levels infinite?
- Sun Oct 13, 2019 8:50 pm
- Forum: Properties of Light
- Topic: Frequency vs. Intensity
- Replies: 4
- Views: 101
Frequency vs. Intensity
Can someone clearly differentiate between intensity and frequency?
- Sun Oct 13, 2019 2:14 pm
- Forum: Properties of Light
- Topic: Threshold Energy
- Replies: 2
- Views: 118
Threshold Energy
Why does threshold energy/work function differ?
- Thu Oct 03, 2019 9:02 pm
- Forum: SI Units, Unit Conversions
- Topic: Kelvin, Celsius, & Fahrenheit Conversions
- Replies: 3
- Views: 105
Kelvin, Celsius, & Fahrenheit Conversions
What are the conversions between Kelvin, Celsius, and Fahrenheit again?
- Thu Oct 03, 2019 8:54 pm
- Forum: SI Units, Unit Conversions
- Topic: unit conersations
- Replies: 7
- Views: 314
Re: unit conersations
As long as you remain consistent with units throughout your work and the problem doesn't explicitly ask for a specific unit of measure, it shouldn't matter.
- Thu Oct 03, 2019 8:51 pm
- Forum: Limiting Reactant Calculations
- Topic: Percent yields/error
- Replies: 3
- Views: 1808
Re: Percent yields/error
So just to clarify, the higher the percent yield, the better? That means that the actual yield is close to the theoretical right?
- Thu Oct 03, 2019 6:36 pm
- Forum: Accuracy, Precision, Mole, Other Definitions
- Topic: Actual Yield vs Theoretical Yield
- Replies: 6
- Views: 522
Re: Actual Yield vs Theoretical Yield
Some reasons for this are side reactions, impurities, some compound sticking to the side of the equipment it's in, human error in measurements.