Explain how the collision model and activated complex model account for the temperature dependence of reactions.
Can anyone expand on this please?
Search found 130 matches
- Sat Mar 14, 2020 8:38 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Objective
- Replies: 2
- Views: 217
- Thu Mar 12, 2020 7:27 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: 7D1
- Replies: 4
- Views: 284
Re: 7D1
What equation are they using in this problem? Honestly I thought that the solution guide answer was confusing. To solve, use the equation ln(kr2/kr1) = Ea/R(1/T1 - 1/T2), found on page 623 of the textbook. You use .87 for kr2, .76 for kr1, 8.31•10^-3 for R, 1000 for T1, and 1030 for T2, and solve f...
- Tue Mar 10, 2020 11:45 pm
- Forum: Administrative Questions and Class Announcements
- Topic: What is the plan for the final?
- Replies: 16
- Views: 1001
Re: What is the plan for the final?
He just sent out an email!
- Tue Mar 10, 2020 3:08 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Catalysts and Rate Law
- Replies: 4
- Views: 299
Catalysts and Rate Law
I know intermediates can't be in our rate law but can catalysts be included?
- Tue Mar 10, 2020 10:37 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Catalysts
- Replies: 1
- Views: 215
Catalysts
Do catalysts have to be added to the slow step in order to change the rate? Will they not affect the rate if they are added to the fast step?
- Mon Mar 09, 2020 10:43 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: In lecture example
- Replies: 1
- Views: 166
In lecture example
Could someone please explain the example of a solid catalyst Dr.Lavelle gave in class today please. What was he referring to when talking about adsorption?
- Mon Mar 09, 2020 8:43 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: 7E7
- Replies: 1
- Views: 128
7E7
" A catalyst is not consumed in the course of a reaction"
Why is this true? I thought it was consumed but then is produced again?
Why is this true? I thought it was consumed but then is produced again?
- Sat Mar 07, 2020 11:47 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: 7D1
- Replies: 4
- Views: 284
7D1
Could anyone please explain the steps taken in this problem? For example, why did they multiply the temperatures? Did they use the original equation but then canceled out ln[A]?
- Sat Mar 07, 2020 11:40 am
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Homework 15. 63
- Replies: 2
- Views: 1527
Re: Homework 15. 63
This was an awesome response! I was very confused and this post really broke down the steps.
- Tue Mar 03, 2020 3:36 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6M.7
- Replies: 5
- Views: 375
Re: 6M.7
I just used the ones that all use the same amount of electrons and it seemed to work out.
- Tue Mar 03, 2020 3:29 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Hw problem 6M.7
- Replies: 1
- Views: 182
Re: Hw problem 6M.7
Yes, there is a table in the appendix. You just look at the values and order them by they're E values.
- Tue Mar 03, 2020 3:26 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6M.5 part A
- Replies: 1
- Views: 171
Re: 6M.5 part A
Because Mg is a metal, it's just currently in liquid form at 25C.
- Tue Mar 03, 2020 3:25 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Oxidizing Power
- Replies: 3
- Views: 259
Oxidizing Power
If something has high oxidizing power, does that mean their standard reduction potential is high?
- Tue Mar 03, 2020 3:24 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Reducing Power
- Replies: 3
- Views: 302
Reducing Power
Can anyone explain what "reducing power" means?
- Tue Feb 25, 2020 12:26 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Lecture notes
- Replies: 4
- Views: 262
Lecture notes
I think I might've written something down wrong during lecture. Can anyone explain how concentration affects cell potential?
- Tue Feb 25, 2020 10:59 am
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Test 2
- Replies: 6
- Views: 372
Re: Test 2
It was until the lecture from yesterday. And will include the lecture from the Friday after the midterm.
- Tue Feb 25, 2020 10:57 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6M.1
- Replies: 4
- Views: 393
Re: 6M.1
Has anyone confirmed if this is a typo? I was confused when looking at the answer key.
- Tue Feb 25, 2020 10:56 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell Diagrams
- Replies: 7
- Views: 328
Re: Cell Diagrams
I'm also confused on why the cell diagram was written this way!
- Tue Feb 25, 2020 10:53 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6N.9
- Replies: 2
- Views: 206
6N.9
How are you supposed to know that tin is the anode? I attached the question below for reference.
- Tue Feb 25, 2020 10:44 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6N.1
- Replies: 1
- Views: 140
6N.1
Does anyone know if this is just a typo and the work done here is wrong since they used 2 instead of 1?
- Sun Feb 23, 2020 8:34 pm
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: Questions 6O.1 &6).3
- Replies: 1
- Views: 183
Questions 6O.1 &6).3
Hey everyone!! I don't have my book with me and was wondering if anyone could post the questions to 6O.1 and 6O.3, please!
- Sat Feb 22, 2020 12:55 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Cell diagrams
- Replies: 2
- Views: 191
Cell diagrams
Could anyone help me with D? I have no idea of the thought process on how to do it.
- Fri Feb 21, 2020 3:54 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: galvanic cell
- Replies: 2
- Views: 145
Re: galvanic cell
I think that's when it's considered to be dead.
- Fri Feb 21, 2020 3:52 pm
- Forum: Balancing Redox Reactions
- Topic: balancing half reactions in a basic solution
- Replies: 7
- Views: 412
Re: balancing half reactions in a basic solution
Do you add the same amount of OH-?
- Fri Feb 21, 2020 3:50 pm
- Forum: Balancing Redox Reactions
- Topic: Oxidation Numbers
- Replies: 9
- Views: 624
Oxidation Numbers
Does anyone have any tips for finding oxidation numbers?
- Fri Feb 21, 2020 3:50 pm
- Forum: Balancing Redox Reactions
- Topic: combining redox reactions
- Replies: 2
- Views: 162
Re: combining redox reactions
Your electrons should cancel out. Nothing else has to cancel but it can occur.
- Fri Feb 21, 2020 3:49 pm
- Forum: Balancing Redox Reactions
- Topic: Adding Water in Redox Reactions
- Replies: 3
- Views: 362
Re: Adding Water in Redox Reactions
You add water in both acidic and basic solutions to balance oxygen.
- Fri Feb 21, 2020 3:45 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: Salt Bridge
- Replies: 3
- Views: 209
Salt Bridge
Could anyone please explain what a salt bridge does?
- Thu Feb 13, 2020 7:32 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Review session powerpoints
- Replies: 4
- Views: 258
Re: Review session powerpoints
I know one of them was posted under this section.
- Thu Feb 13, 2020 7:31 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Thermodynamic midterm review ppt 2/5 Chenxiang Wang
- Replies: 4
- Views: 720
Re: Thermodynamic midterm review ppt 2/5 Chenxiang Wang
I'm not seeing this until now but it will be very helpful for the final!
- Thu Feb 13, 2020 7:29 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm grading
- Replies: 8
- Views: 394
Re: Midterm grading
It is uniform graders. Does anyone know if it'll take about a week like last time?
- Thu Feb 13, 2020 7:28 pm
- Forum: Administrative Questions and Class Announcements
- Topic: grading curve
- Replies: 10
- Views: 642
Re: grading curve
I think if he does it'll only be a few points.
- Thu Feb 13, 2020 7:27 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2
- Replies: 1
- Views: 119
Test 2
I know its early, but does anyone know what the second test will be on?
- Sat Feb 08, 2020 2:11 pm
- Forum: Calculating Standard Reaction Entropies (e.g. , Using Standard Molar Entropies)
- Topic: Molar Entropy
- Replies: 3
- Views: 116
Molar Entropy
What takes precedence when comparing entropies between gases, the degeneracy or molecular weight?
- Thu Feb 06, 2020 9:21 pm
- Forum: Phase Changes & Related Calculations
- Topic: Thermochemistry outline
- Replies: 1
- Views: 125
Thermochemistry outline
Understand the environmental impact of burning fossil fuels, and the use of alternative
fuels as energy sources.
Does this relate to how fossil fuels release a lot of heat into the atmosphere?
fuels as energy sources.
Does this relate to how fossil fuels release a lot of heat into the atmosphere?
- Thu Feb 06, 2020 9:43 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: HW Question 4H.9
- Replies: 1
- Views: 109
HW Question 4H.9
For HW 9.35, it says that Container A is filled with 1.0 mol of the atoms of an ideal monatomic gas. Container B has 1.0 mol of atoms bound together as diatomic molecules that are not vibrationally active. Container C has 1.0 mol of atoms bound together as diatomic molecules that are vibrationally a...
- Tue Feb 04, 2020 11:20 am
- Forum: Calculating Work of Expansion
- Topic: Irreversible vs Reversible
- Replies: 1
- Views: 82
Irreversible vs Reversible
With respect to external pressure, can anyone explain the difference between an irreversible and reversible expansion?
- Tue Feb 04, 2020 10:37 am
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: 4F.11
- Replies: 1
- Views: 83
4F.11
" During the test of an internal combustion engine, 3.00L of nitrogen gas at 18.5 degrees C was compressed suddenly (and irreversibly) to .500L by driving in a piston. In the process the temperature of the gas increased to 28.1 degrees C. Assume ideal behavior and 1.00 mole of nitrogen gas. Wha...
- Sun Feb 02, 2020 2:31 pm
- Forum: Calculating Work of Expansion
- Topic: Homework Textbook
- Replies: 1
- Views: 91
Homework Textbook
Hey, everyone! I don't have my textbook with me but wanted to do some homework, could anyone upload section 4F and 4 G homework sections, please!
- Thu Jan 30, 2020 9:49 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Mondays Lecture Question
- Replies: 3
- Views: 68
Re: Mondays Lecture Question
LNgo 1G wrote:Because the reaction in that example is between a string acid and a strong base, it is a neutralization acid and forms water. The density of pure water is about 1.0 g/mL.
Why are we using density?
- Thu Jan 30, 2020 9:23 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Mondays Lecture Question
- Replies: 3
- Views: 68
Mondays Lecture Question
On Monday, "in a constant P calorimeter at 25c. Mix 50.0ml each of 1.0M HCL and 1.0 M NaOH after mixing, T=31.9C. In his answer he assumed density of solution to be 1.0g/ml, why did he do this? Why didn't we just use how many moles we had for our equation? Also why did he multiply this number t...
- Thu Jan 30, 2020 9:20 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Constant Pressure
- Replies: 7
- Views: 353
Constant Pressure
Can anyone please explain what it means to have constant pressure or constant volume?
- Tue Jan 28, 2020 11:20 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Textbook Section
- Replies: 2
- Views: 148
Re: Textbook Section
This is what I'm trying to figure out too. It seems we've covered 4E and parts of 4D and 4C but not 4A or 4B.
- Tue Jan 28, 2020 11:18 am
- Forum: Phase Changes & Related Calculations
- Topic: Change in Temperature
- Replies: 10
- Views: 243
Re: Change in Temperature
The equilibrium constant will only rise if your reaction is endothermic and you add heat. If you add heat and it's exothermic the equilibrium constant will decrease (this is because your reverse reaction is endothermic and so adding heat will cause a reaction to proceed in reverse direction.
- Tue Jan 28, 2020 11:16 am
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: 4E.5
- Replies: 2
- Views: 105
4E.5
C for 4E.5 stated that there enthalpy is zero, but I dont understand how if new bonds are forming?
- Tue Jan 28, 2020 10:11 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: 4A and B
- Replies: 2
- Views: 81
Re: 4A and B
I would maybe wait till he covers it. I also noticed 4A and 4B had a lot of terms we havent covered.
- Tue Jan 28, 2020 9:59 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: 4C.3
- Replies: 3
- Views: 131
4C.3
I am working on problem 4C.3, which asks to calculate the final temperature and the change in enthalpy when 765 J of energy is transferred as heat to 0.820 mol Kr (g) at 298 L and 1.00 atm. (at constant pressure and constant volume) When solving, they used 5/2 R to get the heat capacity, I'm wonderi...
- Mon Jan 27, 2020 12:30 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Fridays Lecture (week 3)
- Replies: 1
- Views: 178
Fridays Lecture (week 3)
Hello everyone! I wasnt able to make it to Fridays lecture and was hoping someone could please share their notes. Thank you!!
- Thu Jan 23, 2020 4:05 pm
- Forum: Phase Changes & Related Calculations
- Topic: Order to Read Book
- Replies: 3
- Views: 90
Order to Read Book
Dr. Lavelle said something about not going in the exact order of the book. Which sections of Focus 4 should we be reading first/doing the homework?
- Thu Jan 23, 2020 4:01 pm
- Forum: Phase Changes & Related Calculations
- Topic: Steam vs liquid
- Replies: 7
- Views: 336
Steam vs liquid
I got a little confused on Professors explanation of why steam causes a worse burn than boiling water, can anyone explain?
- Mon Jan 20, 2020 7:31 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Module
- Replies: 4
- Views: 187
Re: Module
okay! thanks i think i fixed it, can anyone confirm the answer is 2.10x10^-3
- Mon Jan 20, 2020 6:33 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Module
- Replies: 4
- Views: 187
Module
19. Calculate the reaction quotient, QC, from the following equilibrium data collected in a 3.00 L sealed reaction vessel for the reaction: AsH3 (g) ⇌ As (s) + H2 (g) AsH3 = 5.55 x 10-4 mol, As = 3.31 x 10-3 mol, H2 = 1.23 x 10-3 mol. I keep on getting 2.2 , can anyone tell me what I am doing wrong?...
- Mon Jan 20, 2020 2:20 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kw temperature
- Replies: 8
- Views: 145
Re: Kw temperature
Does anyone know how this number would change in response to temperature?
- Mon Jan 20, 2020 2:15 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Percent ionization
- Replies: 2
- Views: 64
Percent ionization
When we get a percentage of ionization, does that number represent how much we have left?
- Mon Jan 20, 2020 1:18 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 5 percent rule
- Replies: 2
- Views: 46
5 percent rule
Could anyone explain what the five percent rule is, please? Are you looking at x or your ionization percentage?
- Mon Jan 20, 2020 1:15 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Workshop Monday
- Replies: 2
- Views: 132
Workshop Monday
Hello everyone! Professor said that there would be a session today in covel, does anyone know if it will be Lyndon holding his regular session? I believe he said last week he wasn't holding it today so I was wondering if anyone knew.
- Mon Jan 20, 2020 1:12 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Salt solutions
- Replies: 1
- Views: 71
Salt solutions
Professor mentioned something about certain elements that don't affect ph and I was wondering if anyone could tell me what it was? I wasn't able to write it down.
- Sun Jan 19, 2020 6:30 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Titration
- Replies: 3
- Views: 117
Titration
Professor mentioned something about titration but that isn't on this test correct?
- Sun Jan 19, 2020 6:29 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Buffer
- Replies: 6
- Views: 323
Buffer
Can anyone explain what a buffer is please?
- Thu Jan 16, 2020 10:36 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Questions 6C5,6c9
- Replies: 1
- Views: 116
Questions 6C5,6c9
Could anyone post the table 6C.1 and 6C.2, I don't have my book with me but wanted to get some problems done. Thank you!
- Tue Jan 14, 2020 10:08 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 6A.19
- Replies: 6
- Views: 179
Re: 6A.19
I was looking at this too! Either they forgot to add mM to the problem or it is an error in the solutions manual. I got the answer to the ^-15.
- Tue Jan 14, 2020 9:57 am
- Forum: Resonance Structures
- Topic: Resonance
- Replies: 2
- Views: 835
Resonance
Hello, I was wondering why the N2H2 structure did not have resonance but the others did. Is there any rule for when something has resonance? Thank you.
- Fri Jan 10, 2020 2:25 pm
- Forum: Ideal Gases
- Topic: ICE table
- Replies: 7
- Views: 832
Re: ICE table
You set up your ice table to then be able to get your equilibrium constants. After that, you use the equation we have learned which is reactants/products.
- Fri Jan 10, 2020 2:17 pm
- Forum: Ideal Gases
- Topic: Chatelier’s Principle
- Replies: 8
- Views: 195
Re: Chatelier’s Principle
Do you happen to know on which page this falls on in the ideal gases section?
- Fri Jan 10, 2020 2:11 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Graphing K and Q Values
- Replies: 4
- Views: 166
Re: Graphing K and Q Values
I don't believe so, he has never mentioned this and I don't believe it's on the learning objectives on outline1.
- Fri Jan 10, 2020 2:06 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Kp vs Kc
- Replies: 6
- Views: 131
Re: Kp vs Kc
It becomes simpler when you see the phases that your reaction is in, which is usually given to you. For example, if it's in the gas phase you'd use partial pressures. Also if they are giving you units that relate to partial pressure then you'd use Kp.
- Fri Jan 10, 2020 2:02 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Pressure and Volume
- Replies: 8
- Views: 201
Re: Pressure and Volume
It does not affect K. I believe it can affect the concentration of products and reactants but not the ratio between them.
- Thu Jan 09, 2020 4:38 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Homework Question 5H.1
- Replies: 2
- Views: 118
Homework Question 5H.1
I have attached the question below and the answer. However I was wondering if someone could go through how they came to find b and c. Why did they square root for b?
- Thu Dec 05, 2019 7:15 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Sulfato
- Replies: 1
- Views: 112
Sulfato
Is sulfato a chelating ligand? or is it monodentate?
- Tue Dec 03, 2019 9:24 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: Textbook question 6B.9
- Replies: 2
- Views: 262
Re: Textbook question 6B.9
I saw this too, is there somewhere we can double check for the answers? Also, [OH]x[pOH]=10^-14. If you use the numbers in the answer key it doesnt work, but if you use the numbers we got, it does? So I'm thinking it probably was an error.
- Tue Dec 03, 2019 6:38 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: 6D.11 [ENDORSED]
- Replies: 2
- Views: 328
6D.11 [ENDORSED]
The question states, Decide whether an aqueous solution of each of the following salts has a pH equal to or greater than, or less than 7. I was a little confused on how they got the reactions for AlCl3 and Cu(NO3)2.
I put the answer down below if that helps when trying to explain, thank you :)
I put the answer down below if that helps when trying to explain, thank you :)
- Tue Dec 03, 2019 6:07 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: 6B.9
- Replies: 5
- Views: 329
Re: 6B.9
The textbook says it would be 1.5x10^-14Ryan Chang 3A wrote:You are using the correct formula to find the concentration of OH, which is [M]=10^-POH. Plugging in the numbers you get: 10^-14.176 = 6.668 x 10^-15 M, which is the correct answer.
- Tue Dec 03, 2019 4:13 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: 6B.9 Row 2&1
- Replies: 2
- Views: 122
Re: 6B.9 Row 2&1
Ah I see that makes sense!
- Tue Dec 03, 2019 10:52 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: 6B.9 Row 2&1
- Replies: 2
- Views: 122
6B.9 Row 2&1
6B.9 asks you to find the missing values given only certain ones. On row 1 they give you a H30+ concentration of 1.5, you can find the ph to be .176. However, when I would try to get the [H30+] concentration through the pH to double check my answers I would not get 1.5 through the equation we're sup...
- Tue Dec 03, 2019 10:34 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: 6B.9
- Replies: 5
- Views: 329
6B.9
The question asks to find the [OH], [Ph], and [OH] concentration with the given information that is 1.50M of [H30+]. You can get ph 0.176 and OH from that as 14.17. However, how would you get the OH concentration? I thought you would use the equation that is [M]= 10^-pOH. However, you get an incorre...
- Mon Dec 02, 2019 8:52 pm
- Forum: Acidity & Basicity Constants and The Conjugate Seesaw
- Topic: Finding concentration of H30+
- Replies: 1
- Views: 144
Finding concentration of H30+
On homework question 6A.23, it says to calculate the initial molarity of Ba(OH)2 and the molarities of Ba2+, OH-, and H3O+. You can find the first two, which I got 0.05M for OH-. However I don't understand how'd you find the H3O+ concentration. Is there a certain formula you always use? The solution...
- Tue Nov 26, 2019 9:51 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Test 2
- Replies: 1
- Views: 69
Test 2
Does anyone know if test scores appear as 0/50 while grades are being inputted?
- Sun Nov 24, 2019 3:33 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Focus 9C.1 and 9C.2
- Replies: 2
- Views: 131
Focus 9C.1 and 9C.2
Could anyone tell me the name of these topics?/ What is the section heading for these focuses. Thank you so much! :)
- Wed Nov 20, 2019 1:40 pm
- Forum: Lewis Structures
- Topic: Strength of bonds
- Replies: 3
- Views: 411
Strength of bonds
Which pair of atoms are most tightly bound, HO- or HS-, can anyone help me figuring out the answer?
- Wed Nov 20, 2019 1:19 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polarity
- Replies: 5
- Views: 295
Re: Polarity
Thank you Brittany!
- Tue Nov 19, 2019 10:38 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polarity
- Replies: 5
- Views: 295
Re: Polarity
Yes, but would the overall molecule be polar?
- Tue Nov 19, 2019 10:06 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polarity
- Replies: 5
- Views: 295
Polarity
Do double bonds ever play a role in polarity? For example, in GaF3, there is a double bond on one of the fluorines. Would this molecule be considered polar or nonpolar?
- Tue Nov 19, 2019 9:42 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond angles
- Replies: 3
- Views: 310
Bond angles
I had a question regarding CH2CHCN, what would be their bond angles? 120 would be present, would 180 be present as well between C-C-N?
- Tue Nov 19, 2019 5:23 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Sigma & Pi bonds
- Replies: 5
- Views: 315
Sigma & Pi bonds
Sigma bonds can rotate while Pi bonds cant. What gives each this characteristic?
- Tue Nov 19, 2019 3:16 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: Types of forces
- Replies: 4
- Views: 198
Re: Types of forces
Therefore, unless it says there are ions or other different molecules, we don't include those?
- Tue Nov 19, 2019 1:02 pm
- Forum: Lewis Structures
- Topic: H2SeO4
- Replies: 2
- Views: 348
Re: H2SeO4
Oh, I see! Thank you!
- Tue Nov 19, 2019 12:56 pm
- Forum: Lewis Structures
- Topic: H2SeO4
- Replies: 2
- Views: 348
H2SeO4
For H2SeO4, how would you know that the oxygen is bonded to hydrogen? Why would the hydrogen's not be bonded to Se?
- Tue Nov 19, 2019 12:53 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: Types of forces
- Replies: 4
- Views: 198
Types of forces
For homework question, 3F.1, it says to name the types of forces that can occur for certain molecules. In the answer key, SO2, only has dipole-dipole and London forces. Why is dipole-induced dipole and ion-dipole not included in the list?
- Tue Nov 19, 2019 9:48 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Square pyramidal
- Replies: 3
- Views: 107
Re: Square pyramidal
Thank you!! It looks really helpful.
- Mon Nov 18, 2019 8:21 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Square pyramidal
- Replies: 3
- Views: 107
Square pyramidal
We never covered square pyramidal in lecture and I was wondering if anyone knew if we would be tested on this shape?
- Mon Nov 18, 2019 6:37 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Bond angles
- Replies: 2
- Views: 216
Bond angles
I was wondering what the bond angles would be for ICL2-, I know it's linear and would have a bond angle that's 180 but would there be any others? Thank you!
- Sat Nov 16, 2019 2:04 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: Strength of bonds
- Replies: 3
- Views: 161
Re: Strength of bonds
I don't believe so, we just need to know the relative strength of each.
- Sat Nov 16, 2019 1:46 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Acids and Bases
- Replies: 4
- Views: 202
Re: Acids and Bases
I don't believe so, I believe acids and bases are covered in one of the last outlines of the quarter.
- Sat Nov 16, 2019 11:50 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Induced dipole-induced dipole force [ENDORSED]
- Replies: 1
- Views: 75
Re: Induced dipole-induced dipole force [ENDORSED]
An induced-dipole occurs when a dipole is created by the movement of electrons. As we know, electrons are always moving around. For a brief second, they'll be a partial negative/positive on an atom because of this random movement. This will occur in both molecules, leading to an attraction. It is ve...
- Sat Nov 16, 2019 11:47 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lone pairs
- Replies: 3
- Views: 181
Re: Lone pairs
Lone pairs occupy more space because lone pair can move more in a region than a bonding pair can. Electrons repel each other because of that negative-negative charge.
- Sat Nov 16, 2019 11:45 am
- Forum: Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)
- Topic: Test 2
- Replies: 5
- Views: 259
Re: Test 2
Everything covered recently, and one slide from Monday's lecture. I believe it's going to be hybridization.
- Sun Nov 10, 2019 6:24 pm
- Forum: Student Social/Study Group
- Topic: midterm grades
- Replies: 8
- Views: 481
Re: midterm grades
It'll be after the lecture and not discussion. Most likely on Wednesday and TA's will be standing outside with the physical copies.
- Sun Nov 10, 2019 6:16 pm
- Forum: Bond Lengths & Energies
- Topic: test 2
- Replies: 16
- Views: 825
Re: test 2
Has he mentioned what parts of the outline it'll be?
- Sun Nov 10, 2019 5:20 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: 392
Re: Hydrogen bonding
They are another form of bonding that isn't covalent or ionic. It deals with partial negatives and positives.
- Sun Nov 10, 2019 5:18 pm
- Forum: Lewis Structures
- Topic: Does the shape that I draw the Lewis structure matter?
- Replies: 14
- Views: 945
Re: Does the shape that I draw the Lewis structure matter?
The simplest answer would be yes it matters. We'll be learning more about the correct way to draw them in the lectures.