Search found 100 matches
- Sat Mar 14, 2020 5:45 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Order of Reactions
- Replies: 4
- Views: 424
Re: Order of Reactions
How exactly does a reactant have an order as compared to an overall reaction order?
- Sat Mar 14, 2020 5:42 pm
- Forum: Second Order Reactions
- Topic: Termolecular
- Replies: 43
- Views: 2392
Re: Termolecular
How does having three reactants affect the rate law?
- Sat Mar 14, 2020 5:38 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Activation energy
- Replies: 7
- Views: 476
Re: Activation energy
How does a catalyst affect the activation energy?
- Sat Mar 14, 2020 5:35 pm
- Forum: Zero Order Reactions
- Topic: Elementary Reactions
- Replies: 5
- Views: 428
Re: Elementary Reactions
Do coefficients play a role in elementary reactions??
- Sat Mar 14, 2020 5:22 pm
- Forum: First Order Reactions
- Topic: k versus k prime
- Replies: 6
- Views: 591
Re: k versus k prime
Is k and k' related to each other since one is the rate of the forward reaction and the other is the rate of the reverse reaction?
- Sat Mar 14, 2020 5:21 pm
- Forum: *Enzyme Kinetics
- Topic: Heterogeneous catalyst
- Replies: 3
- Views: 447
Re: Heterogeneous catalyst
What does an heterogeneous catalyst mean?
- Sat Mar 14, 2020 5:20 pm
- Forum: General Rate Laws
- Topic: half life
- Replies: 5
- Views: 455
Re: half life
Based on the half-life you calculated in order to get to get to 1/4 or say 1/6 you would double or triple the half-life you got.
- Sun Mar 01, 2020 10:05 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6M.5
- Replies: 3
- Views: 265
Re: 6M.5
follow up for this question.. what would be the number of moles to obtain delta G? The number of moles involved for calculating the delta G (n) is the moles of electrons transferred overall. Be sure the electrons used in the reduction half reaction and the oxidation half reaction are the same. If n...
- Sun Mar 01, 2020 10:03 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Galvanic Cells
- Replies: 10
- Views: 599
Re: Galvanic Cells
If the galvanice cell ever reaches zero this means that the battery has died out and that there is no electron transfer occurring because the E(cathode) is equal to the E(anode).
- Sun Mar 01, 2020 10:01 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: test 2 topics
- Replies: 11
- Views: 784
Re: test 2 topics
Basically all of electrochemistry and the equation of Gibbs free energy involving cell potential.
- Sun Mar 01, 2020 10:00 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Electrochemical Series
- Replies: 5
- Views: 456
Re: Electrochemical Series
Electrochemical series is the table we use to find the cell potential of half reactions.
- Sun Mar 01, 2020 9:58 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Writing cell diagrams
- Replies: 7
- Views: 570
Re: Writing cell diagrams
If 2 species are in the same phase you separate them using a comma and if they are in different lashes you separate them using a single vertical line (|).
- Sun Mar 01, 2020 9:52 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: How to determine anode and cathode in 6.57?
- Replies: 6
- Views: 458
Re: How to determine anode and cathode in 6.57?
The cathode should be the one with the larger E value.
- Sun Mar 01, 2020 9:42 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: cell potential
- Replies: 15
- Views: 830
Re: cell potential
If the cell potential for a reaction is positive that means that delta G is negative meaning the reaction is spontaneous.
- Sun Mar 01, 2020 9:40 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Oxidation Numbers
- Replies: 5
- Views: 443
Re: Oxidation Numbers
The n is the number of moles of electrons being transferred within a redox reaction. The oxidation numbers for oxygen (O2) is -2 and for (O) it’s -1. Hydrogen is always +1 and you should also consider the overall charge of the molecule when assigning oxidation numbers.
- Sun Mar 01, 2020 9:36 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Salt Bridge
- Replies: 12
- Views: 696
Re: Salt Bridge
The salt bridge is put into place so as the balance out the charges within the cathode and the anode. By doing so you arre able to prolong the transfer of electrons
- Sun Mar 01, 2020 9:34 pm
- Forum: Balancing Redox Reactions
- Topic: Cell Diagrams
- Replies: 14
- Views: 988
Re: Cell Diagrams
Typically when writing a cell diagram the cathode (reduction) goes on the right and the anode (oxidation) goes on the left. Metals are typically placed on the outskirts of the cell diagram as well.
- Mon Feb 17, 2020 2:41 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Constant R
- Replies: 15
- Views: 1081
Re: Constant R
What circumstances should we use the difference values of R?
- Mon Feb 17, 2020 2:40 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Isolated Systems.
- Replies: 5
- Views: 490
Re: Isolated Systems.
How does one determine a system is isolated and what does that tell us about its volume and pressure?
- Mon Feb 17, 2020 2:38 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Open Systems
- Replies: 15
- Views: 893
Re: Open Systems
How does one determine whether a system is open and what does that say about pressure and volume?
- Mon Feb 17, 2020 2:19 pm
- Forum: Phase Changes & Related Calculations
- Topic: Negative Work
- Replies: 18
- Views: 1493
Re: Negative Work
What does it mean when we have negative work?
- Mon Feb 17, 2020 2:18 pm
- Forum: Phase Changes & Related Calculations
- Topic: Phase changes
- Replies: 8
- Views: 705
Re: Phase changes
What calculation do we also have to incorporate when going from a gas to a liquid or vice versa?
- Mon Feb 17, 2020 1:57 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Buffer Solution
- Replies: 4
- Views: 557
Re: Buffer Solution
What exactly does a bufffer solution do and how do they relate to strong or weak acid and bases.
- Mon Feb 17, 2020 1:55 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Decreasing pressure
- Replies: 7
- Views: 604
Re: Decreasing pressure
In retrospect by decreasing pressure you are increasing volume since P and V are inversely related to each other. By increasing the volume you essentially have more space for gas to move about, therefore, favoring the side with more moles of gas.
- Mon Feb 17, 2020 1:53 pm
- Forum: Ideal Gases
- Topic: pv=nrt
- Replies: 19
- Views: 1211
Re: pv=nrt
Why and how are we able to equal nRT to work?
- Mon Feb 17, 2020 1:50 pm
- Forum: Entropy Changes Due to Changes in Volume and Temperature
- Topic: Cv vs Cp
- Replies: 17
- Views: 990
Re: Cv vs Cp
Cv is used for constant volume and Cp is used for constant pressure.
- Sun Feb 16, 2020 2:27 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Joules or KJ?
- Replies: 14
- Views: 2805
Re: Joules or KJ?
Why does entropy and enthalpy have different units?
- Sun Feb 16, 2020 2:15 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: spontaneity
- Replies: 39
- Views: 1936
Re: spontaneity
Why exactly does delta G have to be negative to be considered spontaneous?
- Sun Feb 16, 2020 2:09 pm
- Forum: Calculating Work of Expansion
- Topic: work = 0
- Replies: 14
- Views: 1346
Re: work = 0
Under what conditions does work equal zero?
- Sun Feb 16, 2020 2:04 pm
- Forum: Balancing Redox Reactions
- Topic: oxidation vs reduction
- Replies: 19
- Views: 1028
Re: oxidation vs reduction
How do you determine an elements oxidation number ?
- Sun Feb 02, 2020 11:34 pm
- Forum: Calculating Work of Expansion
- Topic: Internal energy
- Replies: 5
- Views: 193
Re: Internal energy
Why can’t U be the internal energy of an open system?
- Sun Feb 02, 2020 11:32 pm
- Forum: Calculating Work of Expansion
- Topic: Work
- Replies: 4
- Views: 191
Re: Work
How do we know whether work is positive or negative?
- Sun Feb 02, 2020 11:31 pm
- Forum: Calculating Work of Expansion
- Topic: reversible expansion
- Replies: 6
- Views: 157
Re: reversible expansion
How would we know on the exam if something is reversible or irreversible ?
- Sun Feb 02, 2020 11:28 pm
- Forum: Calculating Work of Expansion
- Topic: Enthalpy
- Replies: 5
- Views: 186
Re: Enthalpy
I remember that enthalpy(delta H) is the same as q, can someone explain this?
- Sun Feb 02, 2020 11:25 pm
- Forum: Calculating Work of Expansion
- Topic: piston diagram
- Replies: 2
- Views: 160
Re: piston diagram
I’m not exactly sure what a piston is and how that works in the diagram.
- Sun Feb 02, 2020 11:24 pm
- Forum: Calculating Work of Expansion
- Topic: Integrals
- Replies: 4
- Views: 202
Re: Integrals
Can someone explain why we need to take the integral with bounds being the initial and final volume ?
- Sun Jan 26, 2020 4:22 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Heat Capacity
- Replies: 7
- Views: 400
Re: Heat Capacity
How do we know the heat capacity also how does heat transfer of energy work?
- Sun Jan 26, 2020 4:08 pm
- Forum: Phase Changes & Related Calculations
- Topic: Enthalpy w/ Temp
- Replies: 6
- Views: 223
Re: Enthalpy w/ Temp
How do we tell with enthalpy that a reaction is exothermic or endothermic?
- Sun Jan 26, 2020 3:59 pm
- Forum: Phase Changes & Related Calculations
- Topic: Enthalpy & Spontaneity
- Replies: 4
- Views: 244
Re: Enthalpy & Spontaneity
What exactly is the concept of spontaneity and how does it relate to enthalpy?
- Sun Jan 26, 2020 3:11 pm
- Forum: Phase Changes & Related Calculations
- Topic: Phase changes: endothermic vs exothermic
- Replies: 12
- Views: 1271
Re: Phase changes: endothermic vs exothermic
Why would the reverse reaction of vaporization, melting and sublimation be exothermic?
- Mon Jan 20, 2020 12:20 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Adding a catalyst
- Replies: 7
- Views: 315
Re: Adding a catalyst
Does adding a catalyst affect the K since it reaches equilibrium at a faster rate?
- Mon Jan 20, 2020 12:10 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Le Chatelier Principle
- Replies: 4
- Views: 260
Re: Le Chatelier Principle
A change in pressure or concentration only effects the direction the reaction is going because it will shift in direction to maintain equilibrium. However, a change in temperature effects the rates the reactions are occurring, thus, effecting the K value.
- Mon Jan 20, 2020 11:56 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Weak acids & bases
- Replies: 7
- Views: 354
Re: Weak acids & bases
Gerald Bernal1L wrote:you divide the change number by the concentration of the acid. Then you multiply by 100 if you want the percent.
What exactly is the change number as mentioned in the above quote ?
- Mon Jan 20, 2020 11:54 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Le Chatliers Principle In relation to pressure
- Replies: 6
- Views: 282
Re: Le Chatliers Principle In relation to pressure
How does Le Chatliers Principle apply to the concept of pressure?
- Mon Jan 20, 2020 11:52 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Adding Inert Gas
- Replies: 9
- Views: 582
Re: Adding Inert Gas
An inert gas is basically a noble gas where the ones we will most likely see in reactions are He or Ar.
- Wed Jan 08, 2020 6:48 pm
- Forum: Ideal Gases
- Topic: K and Q
- Replies: 8
- Views: 1134
Re: K and Q
How exactly is the Q different from K if they are calculated the same way?
- Wed Jan 08, 2020 6:44 pm
- Forum: Ideal Gases
- Topic: kc vs kp
- Replies: 19
- Views: 3505
Re: kc vs kp
Kp is used, specifically, if the partial pressure of the reactants and products are given and the Kc is used if the concentration of the reactants and products are given.
- Wed Jan 08, 2020 6:35 pm
- Forum: Ideal Gases
- Topic: R constant in PV=nRT
- Replies: 9
- Views: 305
Re: R constant in PV=nRT
I believe the constant will be given to us in the constant sheet so what don't really need to worry about it.
- Wed Jan 08, 2020 6:29 pm
- Forum: Ideal Gases
- Topic: K
- Replies: 10
- Views: 525
Re: K
I'm not sure if the constant Kc will be the same as Kp but I do know that they are used on whether you were given concentrations or if you were given partial pressures.
- Wed Jan 08, 2020 5:53 pm
- Forum: Ideal Gases
- Topic: Units for Pressure
- Replies: 6
- Views: 182
Re: Units for Pressure
What is the difference between the bar unit and the atm unit for pressure?
- Wed Jan 08, 2020 5:37 pm
- Forum: Ideal Gases
- Topic: Dynamic Equilibrium
- Replies: 10
- Views: 411
Re: Dynamic Equilibrium
Does dynamic equilibrium mean that the reaction is constantly going through the forward and reverse reaction since the reactants make the products and the products can make the reactants?
- Sun Dec 08, 2019 5:00 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: polydentate
- Replies: 4
- Views: 366
Re: polydentate
How can a molecule bind in more than one area? Is it because there are elements that have lone pairs on them?
- Sun Dec 08, 2019 4:57 pm
- Forum: Naming
- Topic: bis,tris,tetrakis
- Replies: 6
- Views: 511
Re: bis,tris,tetrakis
Why exactly do we need to use these different prefixes as compared to using di, tri, tetra?
- Sun Dec 08, 2019 4:56 pm
- Forum: Biological Examples
- Topic: en and edta
- Replies: 6
- Views: 649
Re: en and edta
For en and edta are expected to know the chemical formula in its entirety?
- Sun Dec 08, 2019 4:55 pm
- Forum: Biological Examples
- Topic: Heme complex
- Replies: 5
- Views: 371
Re: Heme complex
How many Oxygen does it take to make hemoglobin?
- Sun Dec 08, 2019 4:54 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: chelating ligands [ENDORSED]
- Replies: 51
- Views: 98604
Re: chelating ligands [ENDORSED]
What exactly is a chelating ligand? Can you also provide an example for it?
- Wed Nov 27, 2019 1:20 am
- Forum: Naming
- Topic: Bis,tris, etc
- Replies: 6
- Views: 326
Re: Bis,tris, etc
When exactly do we use bis, cis, tris, etc.? How are they any different from using the other prefixes such as di, tri, etc.?
- Wed Nov 27, 2019 1:17 am
- Forum: Naming
- Topic: Naming coordination compound
- Replies: 5
- Views: 378
Re: Naming coordination compound
When a molecule has en in it, for example, [CoCl2(en)2]+ what does it mean exactly? Does this also have an effect on the charge of the compound?
- Wed Nov 27, 2019 1:15 am
- Forum: Naming
- Topic: Naming Coordination Compound
- Replies: 5
- Views: 330
Re: Naming Coordination Compound
If the overall coordination sphere has a negative charge does it have an effect on the nomenclature on the compound?
- Wed Nov 27, 2019 1:13 am
- Forum: Sigma & Pi Bonds
- Topic: Sigma and Pi Bonds
- Replies: 7
- Views: 444
Re: Sigma and Pi Bonds
Can we tell what hybridization state an element has if they have a sigma bond?
- Wed Nov 27, 2019 1:12 am
- Forum: Sigma & Pi Bonds
- Topic: Pi Bonding
- Replies: 6
- Views: 401
Re: Pi Bonding
Can we tell what type of hybridization state an element has if they have a pi bond?
- Wed Nov 27, 2019 1:11 am
- Forum: Naming
- Topic: Naming Coordination Compound
- Replies: 5
- Views: 330
Re: Naming Coordination Compound
Do anions and cations outside of the coordination sphere need prefixes when we write out the name ?
- Wed Nov 27, 2019 1:08 am
- Forum: Naming
- Topic: Naming Coordination Compound
- Replies: 5
- Views: 330
Re: Naming Coordination Compound
When naming a coordination compound, do we put the molecule outside of the coordination sphere before or after the name? Typically if whatever is outside of the sphere is a cation then it goes before the name but if it is an anion then you would just write it after the name. So K4[Ni(CN)4] would be...
- Wed Nov 27, 2019 1:03 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: brackets
- Replies: 13
- Views: 689
Re: brackets
If an anion comes after the brackets does it affect the nomenclature of the compound, if so how?
- Wed Nov 27, 2019 1:02 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: brackets
- Replies: 13
- Views: 689
Re: brackets
If there is a cation in front of the brackets does that affect the nomenclature of the compound, if so how?
- Wed Nov 27, 2019 12:58 am
- Forum: Sigma & Pi Bonds
- Topic: Pi Bonding
- Replies: 6
- Views: 401
Re: Pi Bonding
When we were drawing out how the pi bonds looked on molecules, we drew two regions for the pi (one on top of the molecule and one on the bottom) but this only represented a single pi bond and not two, can someone explain the logic behind this?
- Wed Nov 27, 2019 12:55 am
- Forum: Ionic & Covalent Bonds
- Topic: Dative Covalent Bonding
- Replies: 4
- Views: 475
Dative Covalent Bonding
What exactly is dative bonding? I know that its a type of binding between transitional metals and ligands but what exactly does it entail?
- Mon Nov 25, 2019 5:09 pm
- Forum: Coordinate Covalent Bonds
- Topic: Coordinate Covalent Bonds
- Replies: 5
- Views: 1274
Re: Coordinate Covalent Bonds
What is the significance of the coordinate covalent bonds? Are these bonds involved in lewis acids and bases?
- Mon Nov 25, 2019 5:05 pm
- Forum: Dipole Moments
- Topic: Dipole Moment
- Replies: 10
- Views: 873
Re: Dipole Moment
How do we tell there is a major difference in electronegativity to cause dipole-moments? Is there a specific range or even an electronegativity chart being given?
- Mon Nov 25, 2019 1:13 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Calculating formal charge
- Replies: 8
- Views: 652
Re: Calculating formal charge
When calculating formal charge the order doesn't matter because each element has there own formal charge. This is calculated through subtracting the number of bonds a lone pair electrons from the valence electron of that given element. As for adding the charges at the end, the only thing you should ...
- Mon Nov 25, 2019 1:06 pm
- Forum: Resonance Structures
- Topic: Resonance
- Replies: 5
- Views: 456
Re: Resonance
Laura WM 3I wrote:It it better to have 2 formal charges of -1 or 1 formal charge of -2?
This depends on the element itself. If one element is more electronegative compared to the other then you should place the negative charge on the element with the higher electronegativity.
- Mon Nov 25, 2019 12:56 pm
- Forum: Dipole Moments
- Topic: Dipole Induced- Dipole Induced
- Replies: 13
- Views: 1183
Re: Dipole Induced- Dipole Induced
Why exactly are there induced dipoles? Is it simply because the molecule would just be more stable if it were bonded or is there another factor that is playing in this?
- Mon Nov 25, 2019 12:50 pm
- Forum: Sigma & Pi Bonds
- Topic: sigma and pi bonds
- Replies: 27
- Views: 1694
Re: sigma and pi bonds
Pi bonds prevent the molecule from rotating, is this because it is formed from a double bond (one sigma and one pi)?
- Mon Nov 25, 2019 12:39 pm
- Forum: Trends in The Periodic Table
- Topic: Electronegativity
- Replies: 9
- Views: 513
Re: Electronegativity
I know that the trend of electronegativity increases as you go up and to the right, however, in the case of oxygen and chlorine which one has a higher electronegativity and what aspect of that element makes it so?
- Mon Nov 25, 2019 12:35 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bent vs linear
- Replies: 56
- Views: 4294
Re: Bent vs linear
While both molecular geometry's do have two bonds connected to the central the main thing to consider is if there are any lone pairs on the central atom as well. There are two instances when it can be considered linear; one way is when there are only two bonds to the central atom and no lone pairs, ...
- Mon Nov 25, 2019 9:42 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bent vs linear
- Replies: 56
- Views: 4294
Re: Bent vs linear
Can we refer to bent as angular or v-shaped as well or are we limited to just saying bent for exams?
- Sun Nov 24, 2019 7:19 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: dipole-dipole vs induced dipole
- Replies: 9
- Views: 592
Re: dipole-dipole vs induced dipole
Why is the molecule OCS is considered polar,shouldn't their dipoles cancel out making the molecule non-polar?
- Sun Nov 24, 2019 7:16 pm
- Forum: Hybridization
- Topic: Hybridization
- Replies: 3
- Views: 230
Re: Hybridization
In class, we used Carbon as an example to understand hybridization since it can adopt all types of hybridization (sp3, sp2, and sp1). Can someone explain why that is?
- Sun Nov 24, 2019 7:13 pm
- Forum: Sigma & Pi Bonds
- Topic: Sigma & Pi Bonds
- Replies: 9
- Views: 633
Re: Sigma & Pi Bonds
Why is it that the sigma is the first bond to always form and not the pi bond?
- Sun Nov 24, 2019 7:13 pm
- Forum: Sigma & Pi Bonds
- Topic: Sigma & Pi Bonds
- Replies: 9
- Views: 633
Re: Sigma & Pi Bonds
What is the bond between an s-orbital and an s-orbital called?
- Sun Nov 24, 2019 7:11 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Radicals and Molecular Shape
- Replies: 4
- Views: 345
Re: Radicals and Molecular Shape
What exact factors of the VSPER model helps us determine the shape/orientation of molecules?
- Sun Nov 10, 2019 6:33 pm
- Forum: Dipole Moments
- Topic: Dipoles Cancelling Out
- Replies: 4
- Views: 300
Re: Dipoles Cancelling Out
DarrenKim_3G wrote:I believe cancelling out has to do with the symmetry of a molecule. For example C2Cl4 has no net dipole moment because the molecule is symmetric so the moment cancels out
When you say symmetric what does that exactly refer too, perhaps the shape of the element?
- Sun Nov 10, 2019 6:21 pm
- Forum: Dipole Moments
- Topic: Boiling Point
- Replies: 11
- Views: 732
Re: Boiling Point
How can we determine between elements which will have a higher boiling point?
- Sun Nov 10, 2019 6:15 pm
- Forum: Dipole Moments
- Topic: Polarity
- Replies: 8
- Views: 249
Re: Polarity
Is there another way besides drawing out an element to determine the polarity?
- Sun Nov 10, 2019 6:04 pm
- Forum: Dipole Moments
- Topic: HYDROGEN BONDING
- Replies: 3
- Views: 145
Re: HYDROGEN BONDING
In terms of covalent, ionic, and hydrogen bonds which is the strongest and why? I would think ionic but I can see how hydrogen bonds are stronger since they are easily attracted to high electronegative elements.
- Sun Nov 10, 2019 5:57 pm
- Forum: Dipole Moments
- Topic: Dipole Moment
- Replies: 6
- Views: 185
Re: Dipole Moment
When Lavelle was drawing the water molecule to show the dipole moment why did he put the arrows pointing toward the oxygen? Is it because of oxygen's higher electronegativity?
- Wed Oct 30, 2019 11:13 am
- Forum: Coordinate Covalent Bonds
- Topic: Why can h20 only donate 1 lone pair?
- Replies: 5
- Views: 2270
Re: Why can h20 only donate 1 lone pair?
D-nice1D wrote:I think that would lead to the oxygen having a 2+ formal charge
Adding on, Oxygen has a high electronegativity so having a formal charge of 2+ is not ideal.
- Wed Oct 30, 2019 11:10 am
- Forum: Octet Exceptions
- Topic: List of Octet exceptions
- Replies: 6
- Views: 329
Re: List of Octet exceptions
Is there a limit on the number of electrons the exceptions to the octet rule can have?
- Wed Oct 30, 2019 11:08 am
- Forum: Resonance Structures
- Topic: Delocalization vs. Resonance
- Replies: 8
- Views: 2998
Re: Delocalization vs. Resonance
So in terms of delocalization can we say this occurs when atoms form bonds with each other because in a way they are spreading out their electrons through sharing them?
- Wed Oct 30, 2019 11:03 am
- Forum: Ionic & Covalent Bonds
- Topic: Ionic Bonds
- Replies: 6
- Views: 352
Ionic Bonds
Just for clarification, ionic bonds are formed between elements that are further from each other due to a substantial difference in their electronegativity?
- Sun Oct 27, 2019 10:10 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Heisenberg Constant
- Replies: 3
- Views: 170
Heisenberg Constant
Why is that when we learned about the Heisenberg uncertainty principle the principle was h/4*pi but in the textbook, they referred to the constant as h/2.
- Sun Oct 27, 2019 10:07 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3641929
Re: Post All Chemistry Jokes Here
Q: What's the best thing to learn about equilibrium?
A: Nothing changes.
A: Nothing changes.
- Sun Oct 27, 2019 10:06 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3641929
Re: Post All Chemistry Jokes Here
Q: Why didn't Na and Cl relationship workout?
A: Because they were salty together.
A: Because they were salty together.
- Sun Oct 27, 2019 10:04 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Wavelength Plausibility
- Replies: 31
- Views: 2714
Re: Wavelength Plausibility
APatel_4A wrote:He said that it is 720 to 400 but that we can just remember 700 to 400 since it's easier!
Thank you !!!
- Sun Oct 27, 2019 10:01 pm
- Forum: Lewis Structures
- Topic: Exceptions to the Octet Rule
- Replies: 3
- Views: 192
Exceptions to the Octet Rule
I remember that there were certain exceptions to the Lewis structure in regards to the octet rule, however, I don't understand the logical/reason behind it. Can someone please explain?
- Sun Oct 06, 2019 6:50 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3641929
Re: Post All Chemistry Jokes Here
Thanos got jokes!
- Sun Oct 06, 2019 6:44 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3641929
Re: Post All Chemistry Jokes Here
Me: Do you know why I make bad jokes about chemistry?
Friend: No, why?
Me: Because, all the good one's Argon.
Friend: No, why?
Me: Because, all the good one's Argon.
- Sun Oct 06, 2019 6:36 pm
- Forum: Administrative Questions and Class Announcements
- Topic: How to find my posts
- Replies: 163
- Views: 168652
Re: How to find my posts
Is there a way to access the lecture powerpoints because I wanted to screenshot one of the images and print it out for reference in my notes.
- Sun Oct 06, 2019 6:30 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Wavelength Plausibility
- Replies: 31
- Views: 2714
Re: Wavelength Plausibility
I remember in the lecture the slides said that visible light can be seen from 700nm (Red) to 400nm (Violet) but in the picture from the slides it went up to 720 nm. So, basically my question is if visible light ranging from 700 nm to 400nm or from 720nm to 400nm.
- Sun Oct 06, 2019 6:19 pm
- Forum: Limiting Reactant Calculations
- Topic: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
- Replies: 68
- Views: 7051
Re: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
I don't want to be that person but what does dimensional analysis mean?