Search found 120 matches
- Mon Mar 15, 2021 11:15 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Calculating Reaction Quotient with Solids
- Replies: 8
- Views: 530
Re: Calculating Reaction Quotient with Solids
Hi! Yes, the denominator of the reactant quotient would just be 1!
- Mon Mar 15, 2021 11:09 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Bomb Calorimeter
- Replies: 14
- Views: 4795
Re: Bomb Calorimeter
Hi! Like many have stated before, a bomb calorimeter is considered a "perfect system" since it is an isolated system which means no energy/matter can leave the system or be brought in.
- Mon Mar 15, 2021 11:05 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kp Units
- Replies: 5
- Views: 457
Re: Kp Units
Hi! I believe you can use bar or atm since they are very similar when calculating Kp
- Mon Mar 15, 2021 10:57 pm
- Forum: Van't Hoff Equation
- Topic: Celcius vs Kelvin for T1 and T2
- Replies: 84
- Views: 7112
Re: Celcius vs Kelvin for T1 and T2
I believe that we should always have temperature in units of Kelvin since using Celsius might give you issues with your answer and units, so unless the question directly asks for the units to be in celsius, just stick to using Kelvin.
- Mon Mar 15, 2021 10:42 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: ICE Chart Question
- Replies: 26
- Views: 1612
Re: ICE Chart Question
Hi! I believe you still have to take into consideration the coefficients for the exponents when writing the constant equation.
- Mon Mar 15, 2021 10:39 pm
- Forum: Phase Changes & Related Calculations
- Topic: Voltage difference
- Replies: 9
- Views: 837
Re: Voltage difference
Hi! Like many others have stated, E(max) is the maximum voltage difference in a system :)
- Mon Mar 15, 2021 8:47 pm
- Forum: General Rate Laws
- Topic: Factors Affecting k
- Replies: 83
- Views: 5690
Re: Factors Affecting k
Hi! Only a change in temperature can change K!
- Mon Mar 15, 2021 8:42 pm
- Forum: Zero Order Reactions
- Topic: Overall order of the reaction
- Replies: 45
- Views: 2081
Re: Overall order of the reaction
Hi! Like many others have stated, the overall order of a reaction can be found by adding the individual orders of the reactants together.
- Mon Mar 15, 2021 8:33 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Value of N
- Replies: 24
- Views: 1196
Re: Value of N
Hi! Like many have stated, n represents the number of electrons being transferred which can be found in the balanced half reactions of the redox reaction.
- Mon Mar 15, 2021 8:23 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: Nernst
- Replies: 6
- Views: 500
Re: Nernst
Hi! Like many others have stated, you use the nernst equation when you are calculating the cell potential under non-standard conditions/when the reaction is not at equilibrium.
- Mon Mar 15, 2021 7:47 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: qrev vs q
- Replies: 21
- Views: 2038
Re: qrev vs q
Hi! Like many others have stated, q represents just heat while qrev represents the heat of a reversible reaction.
- Mon Mar 15, 2021 7:42 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Which R value to choose
- Replies: 13
- Views: 1578
Re: Which R value to choose
When trying to choose what R value to use, you should try looking at/keeping track of the units given to you in the problem to ensure that the units all match so that in your final answer, you end up with the desirable units.
- Mon Mar 15, 2021 7:35 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Forward vs. Reverse
- Replies: 22
- Views: 2175
Re: Forward vs. Reverse
Hi! A forward reaction is from reactants to products (A->B) so it moves from left to right and a reverse reaction is from products to reactants (B->A) so it moves from right to left.
- Mon Mar 15, 2021 7:31 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: ΔG°, ΔH°, and ΔS°
- Replies: 5
- Views: 1185
Re: ΔG°, ΔH°, and ΔS°
Hi! Like many others have stated, usually the naught symbol means the reaction occurs under standard conditions which would be like 298K and so forth.
- Sun Mar 14, 2021 11:07 pm
- Forum: Van't Hoff Equation
- Topic: Delta H naught VS delta H
- Replies: 28
- Views: 2561
Re: Delta H naught VS delta H
Hi! Like many have stated, delta H naught represents change in enthalpy under standard conditions and delta H just represents change in enthalpy.
- Sun Mar 14, 2021 10:59 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: delta U=0
- Replies: 17
- Views: 2683
Re: delta U=0
Like many others have stated, Delta U is equal to 0 for isothermal expansions because the temperature stays constant.
- Sun Mar 14, 2021 10:56 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: pka vs ka
- Replies: 28
- Views: 1429
Re: pka vs ka
I think it has to do with log rules, logab = log a + log b, and also because pKa and pKb are log functions.
- Sun Mar 14, 2021 10:47 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Delta G and G naught
- Replies: 46
- Views: 4671
Re: Delta G and G naught
Like many have stated, delta G naught is at standard conditions, while delta G is not
- Sun Mar 14, 2021 10:29 pm
- Forum: Thermodynamic Definitions (isochoric/isometric, isothermal, isobaric)
- Topic: Useful Summary of Thermodynamic Definitions
- Replies: 55
- Views: 18637
Re: Useful Summary of Thermodynamic Definitions
This was super helpful, thank you so much for the summary!
- Sun Mar 14, 2021 9:20 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Isolated Systems
- Replies: 15
- Views: 872
Re: Isolated Systems
Hi! Like many others have stated, a perfect isolated system is theoretical since there has to be some exchange of energy.
- Sun Mar 14, 2021 6:56 pm
- Forum: Phase Changes & Related Calculations
- Topic: state properties
- Replies: 13
- Views: 840
Re: state properties
Like many others have stated, heat is not a state function because it depends on the pathway of the reaction, while enthalpy does not rely on the pathway, only the initial and final states of the reaction matter.
- Sun Mar 14, 2021 6:49 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Q Calculations
- Replies: 21
- Views: 1091
Re: Q Calculations
Hi! I think it is best to convert your units from mmol/L to mol/L since the units for Q are mol/L, unless the questions tells you otherwise.
- Sun Mar 14, 2021 6:33 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: catalyst's effect on equilibrium
- Replies: 9
- Views: 881
Re: catalyst's effect on equilibrium
A catalyst only lowers the activation energy of a reaction, so it should have no affect on equilibrium or anything else.
- Sun Mar 14, 2021 6:28 pm
- Forum: Ideal Gases
- Topic: K and Q
- Replies: 57
- Views: 3555
Re: K and Q
Like many others have stated, Q is equal to K at equilibrium, while Q is mainly used when the solution is not at equilibirum.
- Sun Mar 14, 2021 6:24 pm
- Forum: Second Order Reactions
- Topic: Determining slow step
- Replies: 22
- Views: 1215
Re: Determining slow step
The way you know if one of the reactants is part of the slow step is if they are part of the overall rate law, but usually the question will tell you.
- Sun Mar 07, 2021 11:15 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: State functions
- Replies: 18
- Views: 935
Re: State functions
Hi! Yes, those are all state functions and there are others as well like temperature.
- Sun Mar 07, 2021 11:12 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: C vs Cs/Cm
- Replies: 8
- Views: 1719
Re: C vs Cs/Cm
Hi! Molar heat capacity is measuring the number of moles, while specific heat capacity is measuring the mass in grams
- Sun Mar 07, 2021 11:08 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Enthalpy vs Entropy
- Replies: 39
- Views: 3286
Re: Enthalpy vs Entropy
Hi! Enthalpy focuses on the change of heat in a system, while entropy focuses on the change in disorder of a system
- Sun Mar 07, 2021 11:05 pm
- Forum: Phase Changes & Related Calculations
- Topic: Enthalpy vs heat
- Replies: 31
- Views: 2625
Re: Enthalpy vs heat
Heat is the transfer of energy between two systems because of an energy difference while enthalpy measures the change of amount of heat in a system
- Sun Mar 07, 2021 10:53 pm
- Forum: Ideal Gases
- Topic: gas constant R
- Replies: 18
- Views: 1702
Re: gas constant R
It is important to know what units are given to you in the question to see what value you have to use, but as long as your units cancel out and you have the correct units at the end then you should be fine.
- Sun Feb 28, 2021 11:28 pm
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: pH meter
- Replies: 11
- Views: 703
Re: pH meter
A pH meter measures the concentration of H+ ions in a solution to determine its acidity.
- Sun Feb 28, 2021 11:20 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Molar Entropy
- Replies: 10
- Views: 1133
Re: Molar Entropy
I believe its because since larger molecules have more atoms, this will lead them to having a greater disorder/ways that the atoms can be arranged, which means larger molecules will inturn have higher entropy.
- Sun Feb 28, 2021 11:00 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Tips for what gas constant to use
- Replies: 10
- Views: 690
Re: Tips for what gas constant to use
Like many others have said, you should try to keep track of/look at the units you are given in the equation to help you determine what gas constant to use!
- Sun Feb 28, 2021 10:53 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Factors that affect the equilibrium constant
- Replies: 31
- Views: 4196
Re: Factors that affect the equilibrium constant
Hi! I believe the only factor that can affect the equilibrium constant is temperature.
- Sun Feb 28, 2021 10:50 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: K meaning
- Replies: 29
- Views: 2290
Re: K meaning
I believe k is just Boltzmann constant which is 1.38x10^—23 J/K
- Sun Feb 21, 2021 11:08 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: percent protonation/deprotonation
- Replies: 15
- Views: 897
Re: percent protonation/deprotonation
Thank you everyone for the explantions, they were really helpful since this was a concept I was also confused about!
- Sun Feb 21, 2021 11:04 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: K vs. Kc
- Replies: 36
- Views: 1422
Re: K vs. Kc
I believe K and Kc are the same concept, the only difference is that Kc is specifically for the equilibrium constant of concentrations and Kp is for partial pressures.
- Sun Feb 21, 2021 10:39 pm
- Forum: Balancing Redox Reactions
- Topic: coefficients for oxidation number
- Replies: 22
- Views: 4985
Re: coefficients for oxidation number
I believe coefficients do not affect the oxidation number, they are just there to help balance the equation.
- Sun Feb 21, 2021 10:35 pm
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Solids and Liquids?
- Replies: 26
- Views: 1524
Re: Solids and Liquids?
Yes, like many others have stated, only gases apply to Le Chatelier's Priniciple
- Sun Feb 21, 2021 10:28 pm
- Forum: Ideal Gases
- Topic: Temperature
- Replies: 99
- Views: 7010
Re: Temperature
Yes, I believe you would assume it's at standard conditions, 25 C or 298 K :)
- Sun Feb 14, 2021 11:22 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: R constants
- Replies: 40
- Views: 2269
Re: R constants
You would most likely have to look at the units given and then from there determine which R value/constant is best to use.
- Sun Feb 14, 2021 11:17 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: G° vs G
- Replies: 30
- Views: 2708
Re: G° vs G
G°is under standard conditions (298 K and 1 atm) and G is not.
- Sun Feb 14, 2021 11:09 pm
- Forum: Phase Changes & Related Calculations
- Topic: State Property
- Replies: 71
- Views: 3281
Re: State Property
State property only focuses on the final value and the initial value, and does not focus on the path taken to reach the state.
- Sun Feb 14, 2021 11:05 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Closed vs Isolated System
- Replies: 30
- Views: 1410
Re: Closed vs Isolated System
Thank you everyone for the explanations and examples, this really helped since this was also something I was having some trouble with!
- Sun Feb 14, 2021 11:00 pm
- Forum: Ideal Gases
- Topic: Units for K
- Replies: 29
- Views: 1295
Re: Units for K
Since K is a ratio, when you solve for K all the units cancel out so in the end K is left unitless.
- Sun Feb 07, 2021 11:31 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Hess's Law
- Replies: 12
- Views: 574
Re: Hess's Law
Thank you everyone for the explanations and tips, I also was having trouble with problems involving Hess's Law and this was really helpful!
- Sun Feb 07, 2021 11:27 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Units
- Replies: 10
- Views: 439
Re: Units
I believe it really depends on what units the question is asking for. One thing you do have to remember is to make sure that all your units are either in Kelvin in the equation or they are all in Celsius.If they are not you have to convert them so all the units in the equation are the same.
- Sun Feb 07, 2021 11:19 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Negative Sign
- Replies: 16
- Views: 612
Re: Negative Sign
Like many have said, the negative sign would go on the side that is exothermic, which means it is losing heat.
- Sun Feb 07, 2021 11:12 pm
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: types of gas
- Replies: 9
- Views: 353
Re: types of gas
Yes, like others have stated, you would just have to draw out the lewis structure.
- Sun Feb 07, 2021 10:50 pm
- Forum: Phase Changes & Related Calculations
- Topic: when to assume x is insignificant
- Replies: 86
- Views: 7808
Re: when to assume x is insignificant
Hi! I believe we can assume x is insignificant when the k value is less than 10^-4
- Sun Jan 31, 2021 11:04 pm
- Forum: Phase Changes & Related Calculations
- Topic: Vapor vs gas
- Replies: 121
- Views: 12530
Re: Vapor vs gas
Like many have stated before, there is no difference between vapor and gas, they mean the same thing :)
- Sun Jan 31, 2021 10:57 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: is HClO3 weak or strong? [ENDORSED]
- Replies: 49
- Views: 4471
Re: is HClO3 weak or strong? [ENDORSED]
HClO3 would be considered a strong acid
- Sun Jan 31, 2021 10:53 pm
- Forum: Ideal Gases
- Topic: Exo vs Endothermic
- Replies: 40
- Views: 2562
Re: Exo vs Endothermic
Exothermic is when energy is being released, like in the forming of bonds, and endothermic is when energy is required, like when you are breaking bonds. This is how I think of it, hope it helps!
- Sun Jan 31, 2021 10:45 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Strong Acids/Bases
- Replies: 19
- Views: 1407
Re: Strong Acids/Bases
I was also having trouble with which strong acids/bases I should memorize, so thanks to everyone for the resources and explanations, it really helped!
- Sun Jan 31, 2021 10:41 pm
- Forum: Ideal Gases
- Topic: Reversing Reactions
- Replies: 68
- Views: 2546
Re: Reversing Reactions
When you reverse a reaction, you would take the reciprocal of K so it would be 1/k.
- Sun Jan 24, 2021 11:07 pm
- Forum: Phase Changes & Related Calculations
- Topic: Define Phase Change
- Replies: 78
- Views: 5527
Re: Define Phase Change
Phase change is when a substance goes/changes from one state of matter to another, an example would be when a solid changes to a liquid and so forth.
- Sun Jan 24, 2021 11:01 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Hess's Law
- Replies: 58
- Views: 3156
Re: Hess's Law
I was also wondering about this, thank you everyone for the explanations and resources, they were really helpful!
- Sun Jan 24, 2021 10:48 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Direction of arrows
- Replies: 11
- Views: 551
Re: Direction of arrows
When there is one arrow present, that usually means that the reactions favors that side of the reaction.
- Sun Jan 24, 2021 10:28 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Heat released/ gained
- Replies: 22
- Views: 1073
Re: Heat released/ gained
When breaking a bond, energy is required. On the other hand, when a bond is formed, energy is released.
- Sun Jan 24, 2021 10:24 pm
- Forum: Phase Changes & Related Calculations
- Topic: Endothermic v. Exothermic
- Replies: 139
- Views: 15224
Re: Endothermic v. Exothermic
Yes, like others have said, endothermic reactions will always have a positive delta H and exothermic reactions will always have a negative delta H
- Sun Jan 17, 2021 11:38 pm
- Forum: Ideal Gases
- Topic: Kp?
- Replies: 30
- Views: 1085
Re: Kp?
Yes, like many have stated, partial pressure only applies to gases!
- Sun Jan 17, 2021 11:25 pm
- Forum: Ideal Gases
- Topic: R Value
- Replies: 17
- Views: 741
Re: R Value
Like many have stated before, we will most likely be given a constant sheet to use for the exam, so I do not think you have to memorize it :)
- Sun Jan 17, 2021 11:07 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: Strong vs Weak Acids and Bases
- Replies: 7
- Views: 294
Re: Strong vs Weak Acids and Bases
Like others have said, I think it would be best to try and memorize the strong acids/bases.
- Sun Jan 17, 2021 10:37 pm
- Forum: Ideal Gases
- Topic: Non-Ideal gases?
- Replies: 26
- Views: 1017
Re: Non-Ideal gases?
I do not think we use them/go over them in this course!
- Sun Jan 17, 2021 10:34 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE table troubles
- Replies: 16
- Views: 793
Re: ICE table troubles
Thank you everyone for the helpful tips and advice, it really helps!
- Sun Jan 10, 2021 9:15 pm
- Forum: Ideal Gases
- Topic: Kc vs Kp
- Replies: 109
- Views: 5071
Re: Kc vs Kp
Thank you to everyone for the explanations, I was also having trouble with this!
- Sun Jan 10, 2021 9:09 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Sapling Homework #5
- Replies: 3
- Views: 132
Re: Sapling Homework #5
Thank you so much for the explanation, it really helped me figure out how to solve a similar problem I had!
- Sun Jan 10, 2021 9:00 pm
- Forum: Ideal Gases
- Topic: Units of Temperature
- Replies: 82
- Views: 3982
Re: Units of Temperature
Hi! The units for temperature should be in kelvin I believe.
- Sun Jan 10, 2021 8:58 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Concentrations
- Replies: 9
- Views: 494
Re: Concentrations
I believe the concentrations of P and R should be given to you in the problem in some way.
- Sun Jan 10, 2021 8:55 pm
- Forum: Ideal Gases
- Topic: Units for Pressure
- Replies: 41
- Views: 2606
Re: Units for Pressure
Hi! I believe the unit should be atm, I do not think we have to convert to pascals.
- Wed Dec 16, 2020 6:24 pm
- Forum: Dipole Moments
- Topic: Dipole Arrows & Electronegativity
- Replies: 6
- Views: 480
Re: Dipole Arrows & Electronegativity
Dipole arrows move/point towards the more electronegative atom.
- Wed Dec 16, 2020 6:22 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bent vs Angular
- Replies: 20
- Views: 970
Re: Bent vs Angular
Bent and angular refer to the same molecular geometry.
- Wed Dec 16, 2020 6:19 pm
- Forum: Sigma & Pi Bonds
- Topic: Pi Bonds
- Replies: 18
- Views: 858
Re: Pi Bonds
Pi bonds are only applicable to covalent bonds.
- Wed Dec 16, 2020 6:16 pm
- Forum: Einstein Equation
- Topic: units for E=hv
- Replies: 21
- Views: 1197
Re: units for E=hv
I thinks it's mostly going to be j/photon, but it can also be j/atom, it really depends on the question.
- Wed Dec 16, 2020 6:11 pm
- Forum: Lewis Acids & Bases
- Topic: Water
- Replies: 63
- Views: 3017
Re: Water
Water can be both an acid and a base since it is amphoteric.
- Sun Dec 06, 2020 11:04 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordination Number
- Replies: 13
- Views: 974
Re: Coordination Number
The coordination number is the number of atoms the central atom is bonded to. I believe it is important to know because it allows us to find the name and shape of the coordination complex.
- Sun Dec 06, 2020 10:57 pm
- Forum: Naming
- Topic: Naming quizlet
- Replies: 41
- Views: 1923
Re: Naming quizlet
Thank you so much for sharing this with us, it is really helpful!
- Sun Dec 06, 2020 10:54 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Sapling Week 9
- Replies: 6
- Views: 479
Re: Sapling Week 9
The most common geometry for a complex with a coordination number of 6 would just be octahedral.
- Sun Dec 06, 2020 10:49 pm
- Forum: Naming
- Topic: Roman numeral
- Replies: 5
- Views: 301
Re: Roman numeral
Thanks everyone for the clarification, I was always having a hard time with finding the oxidation number!
- Sun Dec 06, 2020 9:14 pm
- Forum: Naming
- Topic: "(en)" Sapling
- Replies: 19
- Views: 970
Re: "(en)" Sapling
Thank you to everyone for the clarification, I also was wondering what that meant as well!
- Sun Nov 29, 2020 11:42 pm
- Forum: Hybridization
- Topic: Sigma and Pi bonds
- Replies: 29
- Views: 2815
Re: Sigma and Pi bonds
One sigma bond is just a single bond and one can be found in all bonds. Pi bonds are found in double and triple bonds. There is 1 pi bond and 1 sigma bond in a double bond and 2 pi bonds and 1 sigma bond in a triple bond. Hope this helps!
- Sun Nov 29, 2020 11:32 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: finding the shape of a molecule
- Replies: 6
- Views: 444
Re: finding the shape of a molecule
I think when we are trying to find the shape of a molecule, you have to draw/use the most stable lewis structure, but I am not very sure. This is also something that I wanted to know as well.
- Sun Nov 29, 2020 11:19 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Determining Molecular Shape
- Replies: 9
- Views: 494
Re: Determining Molecular Shape
Molecular geometry is not affected by bond type, it is affected by the amount of lone pairs there are.
- Sun Nov 29, 2020 11:13 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Shape Names
- Replies: 50
- Views: 2590
Re: Shape Names
The shape would be bent or angular, and you can use either term to describe the shape since they mean the same thing.
- Sun Nov 29, 2020 11:06 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Equatorial/ Axial Planes
- Replies: 14
- Views: 915
Re: Equatorial/ Axial Planes
Equatorial atoms positioned horizontally on the same plane as the central atom and surround it you could say, while axial atoms are vertical which would be above and below the central atom.
- Sun Nov 29, 2020 10:49 pm
- Forum: Lewis Acids & Bases
- Topic: angle size
- Replies: 11
- Views: 454
Re: angle size
I was also having some trouble with angle size, thanks to everyone for the explanations and the resources to figure this out, it was very helpful!
- Sun Nov 29, 2020 9:42 pm
- Forum: Hybridization
- Topic: Single Bonds and Sigma Bonds
- Replies: 23
- Views: 1195
Re: Single Bonds and Sigma Bonds
Yes, all single bonds contain a sigma bond and a double and triple bond also contain one sigma bond as well.
- Sun Nov 29, 2020 9:38 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: sigma vs pi bonds
- Replies: 33
- Views: 2160
Re: sigma vs pi bonds
All single bonds contain a sigma bond, double bonds contain a sigma bond and a pi bond, and lastly a triple bond has one sigma bond and two pi bonds.
- Sun Nov 29, 2020 8:03 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polarity
- Replies: 17
- Views: 736
Re: Polarity
Thank you to everyone for the explanations, I was also having some trouble with this topic!
- Sun Nov 22, 2020 10:25 pm
- Forum: Ionic & Covalent Bonds
- Topic: Rules of ionization energy
- Replies: 18
- Views: 1807
Re: Rules of ionization energy
Ionization energy increases as you go up and across (to the right) the periodic table.
- Sun Nov 22, 2020 10:16 pm
- Forum: Electronegativity
- Topic: Trick for remembering periodic trends
- Replies: 11
- Views: 3517
Re: Trick for remembering periodic trends
Thank you for sharing, this is really helpful!
- Sun Nov 22, 2020 8:23 pm
- Forum: Electronegativity
- Topic: Periodic trend
- Replies: 17
- Views: 958
Re: Periodic trend
Yes, you are correct. Electron affinity and ionization energy follow/have the same trend as electronegativity.
- Sun Nov 22, 2020 8:12 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: What exactly is a dipole? [ENDORSED]
- Replies: 16
- Views: 1241
Re: What exactly is a dipole? [ENDORSED]
Thank you so much to everyone for the clarification, I was also having trouble with this topic!
- Sun Nov 22, 2020 8:10 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: London Forces [ENDORSED]
- Replies: 19
- Views: 876
Re: London Forces [ENDORSED]
Yes, london dispersion Forces are found in all molecules but they are the weakest bond.
- Sun Nov 22, 2020 8:02 pm
- Forum: General Science Questions
- Topic: # of chem posts
- Replies: 27
- Views: 1893
Re: # of chem posts
By today, we should have 35 posts and 50 by the end of the quarter since we have to post five posts each week.
- Sun Nov 15, 2020 11:06 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Textbook 2D.9
- Replies: 4
- Views: 265
Textbook 2D.9
Hi everyone! Can someone help me out with this problem from the textbook?
"Arrange the cations, Rb^+, Be ^2+, and Sr^2+ in order of increasing polarizing power. Explain your reasoning."
"Arrange the cations, Rb^+, Be ^2+, and Sr^2+ in order of increasing polarizing power. Explain your reasoning."
- Sun Nov 15, 2020 10:32 pm
- Forum: Electronegativity
- Topic: determining electronegativity
- Replies: 40
- Views: 5899
Re: determining electronegativity
I was also having trouble with determining electronegativity, thank you to everyone for the clarification, it really helped!
- Sun Nov 15, 2020 9:58 pm
- Forum: Lewis Structures
- Topic: Textbook 2B.5
- Replies: 1
- Views: 91
Textbook 2B.5
I'm having trouble with this problem in the textbook, can someone help me out?
"Draw the Lewis structure of (a) tetrahydridoborate ion, (b) hypobromite ion, (c) amide ion,"
"Draw the Lewis structure of (a) tetrahydridoborate ion, (b) hypobromite ion, (c) amide ion,"
- Sun Nov 15, 2020 8:21 pm
- Forum: Lewis Structures
- Topic: Drawing Lewis Structures on Midterm
- Replies: 31
- Views: 1270
Re: Drawing Lewis Structures on Midterm
I think we do have to draw the lewis structure with the lowest fromal charge since it is the most stable, but I don't think we will have to draw them on the midterm since it is multiple choice.
- Sun Nov 15, 2020 8:08 pm
- Forum: Lewis Structures
- Topic: Lewis acids and Bases
- Replies: 20
- Views: 883
Re: Lewis acids and Bases
I was also having a hard time with the classification of Lewis Acids and Bases, so I'm glad you asked. Thank you so much to everyone for the clarification, it was very helpful!