Search found 63 matches
- Tue Mar 12, 2019 11:33 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: arrhenius equation
- Replies: 1
- Views: 292
arrhenius equation
have we learned how to use the arrhenius equation in the way that the homework problems 15.61 and beyond use them
- Tue Mar 12, 2019 9:54 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Frequency factor
- Replies: 3
- Views: 399
Re: Frequency factor
yes that cleared it up for me! thank you!^^^
- Tue Mar 12, 2019 9:43 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: 6th edition 15.49
- Replies: 2
- Views: 350
Re: 6th edition 15.49
someone correct me if I'm wrong but if it asks for the rate law of that specific step in the rxn I think you do include intermediates. However it is not included in the rate law of the overall reaction. The slow step indicates the overall rate law so if there was an intermediate in the reactants of ...
- Tue Mar 12, 2019 5:07 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: molecularity
- Replies: 3
- Views: 453
molecularity
How would u indicate molecularity when given step 1 and 2 for a rxn mechanism
- Tue Mar 12, 2019 12:16 pm
- Forum: General Rate Laws
- Topic: stoichiometric coeffecients
- Replies: 1
- Views: 288
stoichiometric coeffecients
Do stoichiometric coefficients only matter for the unique rate or is there other instances in kinetics where stoichiometric coefficients are considered?
- Tue Mar 12, 2019 12:10 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: rxn mechanisms
- Replies: 3
- Views: 392
rxn mechanisms
What exactly does rxn mechanisms tell us?
- Tue Mar 12, 2019 12:07 pm
- Forum: Method of Initial Rates (To Determine n and k)
- Topic: instantaneous and unique rate
- Replies: 6
- Views: 1197
instantaneous and unique rate
is the instantaneous rate different from the unique rate or are they the same thing?
- Tue Mar 12, 2019 12:04 pm
- Forum: Second Order Reactions
- Topic: amounts of reactant and its affect on rate
- Replies: 6
- Views: 543
amounts of reactant and its affect on rate
If a reaction is second order with respect to reactant A, if the concentration of reactant A is doubled, is the rate quadrupled?
- Mon Mar 11, 2019 12:01 pm
- Forum: First Order Reactions
- Topic: concept
- Replies: 2
- Views: 318
concept
Is there a conceptual meaning behind a second order reaction?
- Mon Mar 11, 2019 12:01 pm
- Forum: Zero Order Reactions
- Topic: Concept
- Replies: 4
- Views: 737
Concept
Is there a conceptual meaning behind a zero order reaction?
- Mon Mar 11, 2019 12:00 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Frequency factor
- Replies: 3
- Views: 399
Frequency factor
What is the frequency factor, A?
- Mon Mar 11, 2019 10:44 am
- Forum: Zero Order Reactions
- Topic: Graphs
- Replies: 6
- Views: 850
Re: Graphs
Can anyone post the graphs for each rxn and sort of explain them? I didn't really get them down in my notes in class
- Fri Mar 08, 2019 12:29 am
- Forum: First Order Reactions
- Topic: Question 15.27
- Replies: 1
- Views: 273
Re: Question 15.27
I also had a problem with this question but for part c "How much time must elapse for the concentration of A to decrease to (c) 15% of its initial concentration" I used the half life of a first order rxn to find k, then solved for t using the first order integrated rate law, however I cann...
- Thu Mar 07, 2019 11:47 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: oxidizing power vs reducing power
- Replies: 3
- Views: 6462
oxidizing power vs reducing power
what is reducing power and oxidizing power? How do these relate to Ecell?
- Sun Mar 03, 2019 11:27 pm
- Forum: General Rate Laws
- Topic: Unique Rate
- Replies: 2
- Views: 289
Re: Unique Rate
How do we use the derivative to find the unique rate?? any math examples or problems of this?
- Sun Mar 03, 2019 10:42 pm
- Forum: General Rate Laws
- Topic: 15.1 6th edition
- Replies: 1
- Views: 285
15.1 6th edition
Complete the following statements relating to the
production of ammonia by the Haber process, for which
the overall reaction is N2(g) 3 H2(g) S 2 NH3(g).
What is the Haber process?
production of ammonia by the Haber process, for which
the overall reaction is N2(g) 3 H2(g) S 2 NH3(g).
What is the Haber process?
- Tue Feb 26, 2019 11:44 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: inert electrode?
- Replies: 1
- Views: 189
inert electrode?
How do I know when to use an inert electrode?
- Tue Feb 26, 2019 11:09 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: cell diagrams
- Replies: 1
- Views: 246
cell diagrams
If asked to write the cell diagram for a reaction, how do you know if there should be a salt bridge or porous disk? Is one more common than the other? will it be specified somewhere in the problem?
- Tue Feb 26, 2019 9:54 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: n
- Replies: 8
- Views: 806
Re: n
If they just give you a balanced redox reaction, do you then just look back at the half reactions and balance the charges again to figure out what the difference in moles of electrons were to get your n?
- Tue Feb 26, 2019 8:08 pm
- Forum: Balancing Redox Reactions
- Topic: oxidizing agent and reducing agent
- Replies: 15
- Views: 1310
oxidizing agent and reducing agent
What is the best way to remember how to identify which is the oxidizing agent and which is the reducing agent?
- Sun Feb 24, 2019 9:44 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: 9.63
- Replies: 1
- Views: 263
9.63
9.63 Determine which of the following compounds are stable with respect to decomposition into their elements under standard conditions at 25 C (see Appendix 2A): (a) PCl5(g); (b) HCN(g); (c) NO(g); (d) SO (g). After calculating the standard free energy of formation of the compounds, why does a posit...
- Sun Feb 24, 2019 1:29 am
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Concepts
- Replies: 2
- Views: 300
Concepts
I do not completely understand how the values of enthalpy and entropy explain the spontaneity of a reaction (aka the concepts of the Gibbs free energy equation), can someone give me a quick run down?
- Wed Feb 13, 2019 4:01 am
- Forum: Administrative Questions and Class Announcements
- Topic: Lyndon's HOTDOG MIDTERM REVIEW SESSION!! FINALLY!
- Replies: 49
- Views: 11464
Re: Lyndon's HOTDOG MIDTERM REVIEW SESSION!! FINALLY!
Can anyone share the answers to questions 1-3 on Lyndon's review? I was an hour late to the review session bc I had a midterm
- Tue Feb 05, 2019 12:33 pm
- Forum: Student Social/Study Group
- Topic: review sessions
- Replies: 2
- Views: 300
review sessions
Is there any information up for midterm review sessions yet?
- Mon Feb 04, 2019 11:20 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: helpful hw problems?
- Replies: 1
- Views: 218
helpful hw problems?
Does anyone know which problems in the sixth edition cover what was gone over in today's lecture (Monday 2/4)? thanks!
- Tue Jan 29, 2019 10:29 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Homework
- Replies: 9
- Views: 884
Homework
some of the homework problems do not seem to match up with any of the examples we did in class. Where do these start in the 6th edition
- Sun Jan 20, 2019 7:44 pm
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: 12.27 b 6th edition
- Replies: 1
- Views: 139
12.27 b 6th edition
A careless laboratory technician wants to prepare 200.0 mL of a 0.025 m HCl(aq) solution, but uses a 250.0-mL volumetric ask by mistake.
part b asks you to find the actual pH of the solution in the 250.0 mL flask, how do you do this with information given?
part b asks you to find the actual pH of the solution in the 250.0 mL flask, how do you do this with information given?
- Sun Jan 20, 2019 2:12 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Given Kw
- Replies: 2
- Views: 194
Given Kw
Can anyone explain the reasoning behind, given a Kw (at any temperature, doesn't really matter), why do we know that the concentrations of [H30+] and [OH-] the same?
- Tue Jan 15, 2019 4:52 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: ICE table
- Replies: 4
- Views: 437
ICE table
When do you know you have to use an ICE table?
- Tue Jan 15, 2019 4:48 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 11.39 6th edition
- Replies: 4
- Views: 460
11.39 6th edition
Can someone please explain this problem:
Use the information in Table 11.2 to determine the value of K at 300 K for the reaction 2 BrCl(g) + H2(g) ∆ Br2(g) + 2 HCl(g)
Use the information in Table 11.2 to determine the value of K at 300 K for the reaction 2 BrCl(g) + H2(g) ∆ Br2(g) + 2 HCl(g)
- Tue Jan 15, 2019 4:38 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 11.37 6th edition
- Replies: 3
- Views: 297
11.37 6th edition
I don't understand how to calculate K for part c of this problem, can someone please explain the reasoning for the answer that the solution manual comes to? 11.37 For the reaction N (g) + 3 H (g) ∆ 2 NH (g) at 223 400. K, K 41. Find the value of K for each of the following reactions at the same temp...
- Tue Jan 15, 2019 4:09 pm
- Forum: Non-Equilibrium Conditions & The Reaction Quotient
- Topic: 11.33 6th edition
- Replies: 2
- Views: 239
11.33 6th edition
11.33 A 0.500-L reaction vessel at 700. K contains 1.20 mmol SO2(g), 0.50 mmol O2(g), and 0.10 mmol SO3(g). At 700. K, Kc 1.7 106 for the equilibrium 2 SO2(g) O2(g) ∆ 2 SO3(g). (a) Calculate the reaction quotient Qc. (b) Will more SO3(g) tend to form? Why do we divide each elements moles by the volu...
- Sat Dec 08, 2018 11:59 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: Test 3 6b
- Replies: 2
- Views: 502
Test 3 6b
what was the answer to this 6b on test 3?
Order these cations from least to most polarizing power: Li+,Ca2+,Cs+,Ba2+
and can you explain why?
Order these cations from least to most polarizing power: Li+,Ca2+,Cs+,Ba2+
and can you explain why?
- Sat Dec 08, 2018 11:37 pm
- Forum: Air Pollution & Acid Rain
- Topic: practice problems?
- Replies: 1
- Views: 459
practice problems?
are there any practice problems for acid rain?
- Sat Dec 08, 2018 11:00 pm
- Forum: Lewis Acids & Bases
- Topic: 12.25
- Replies: 1
- Views: 396
12.25
Can someone walk me through exercise 12.25?
Calculate the initial molarity of Ba(OH)2 and the molarities of Ba2 , OH , and H3O in an aqueous solution that contains 0.43 g of Ba(OH)2 in 0.100 L of solution.
Calculate the initial molarity of Ba(OH)2 and the molarities of Ba2 , OH , and H3O in an aqueous solution that contains 0.43 g of Ba(OH)2 in 0.100 L of solution.
- Sat Dec 08, 2018 2:06 am
- Forum: Naming
- Topic: order of ligands when going from name to formula
- Replies: 3
- Views: 415
order of ligands when going from name to formula
Based off the name of the coordination compound given, if there are multiple different ligands does it matter what order you write them when writing out the formula?
17.31 d
Can someone walk me through how to get the formula of sodium bisoxalato(diaqua)ferrate(III)?
- Sat Dec 08, 2018 1:52 am
- Forum: Naming
- Topic: confusion name to formula
- Replies: 4
- Views: 486
confusion name to formula
If we are given the name of a coordination compound, for example, potassium hexacyanidochromate(III), I see that the 'ate' in chromate means a negative complex. But when writing out the formula, since there is a potassium(a cation), does it counter the negative charge of the complex and therefore th...
- Sat Dec 08, 2018 12:11 am
- Forum: Administrative Questions and Class Announcements
- Topic: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
- Replies: 118
- Views: 20836
Re: FINAL PRACTICE - Lyndon's Churro Review Session [ENDORSED]
can someone explain 23 and why porphyrin ligand is tetradentrate
- Mon Nov 26, 2018 9:33 pm
- Forum: Hybridization
- Topic: bond angles and increasing s-character
- Replies: 2
- Views: 1179
bond angles and increasing s-character
Can someone please explain why the bond angles increase as the s-character of a hybrid orbital increases
- Mon Nov 26, 2018 6:36 pm
- Forum: Hybridization
- Topic: 4.31
- Replies: 2
- Views: 142
4.31
4.31 "State the relative orientations of the following hybrid orbitals: (a) sp3; (b) sp; (c) sp3d2; (d) sp2."
What does it mean by relative orientations? what answer is this question exactly looking for?
What does it mean by relative orientations? what answer is this question exactly looking for?
- Sun Nov 25, 2018 3:42 pm
- Forum: Dipole Moments
- Topic: distinguishing dipole moments
- Replies: 1
- Views: 331
distinguishing dipole moments
Can someone explain to me how we know there is a dipole moment in terms of bond vectors? perhaps an example as well?
- Sun Nov 25, 2018 1:36 pm
- Forum: Lewis Structures
- Topic: Central atom of CNO-
- Replies: 2
- Views: 161
Central atom of CNO-
which is the central atom in CNO- ?
- Mon Nov 19, 2018 12:04 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Electron geometry vs molecular shape
- Replies: 4
- Views: 385
Electron geometry vs molecular shape
Did we go over the difference between electron geometry and molecular shape?
- Sun Nov 18, 2018 11:08 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Dipole moments
- Replies: 8
- Views: 3298
Dipole moments
How do you know when certain dipole moments cancel each other out?
- Sun Nov 11, 2018 11:56 pm
- Forum: Dipole Moments
- Topic: Dipole Moments [ENDORSED]
- Replies: 10
- Views: 952
Re: Dipole Moments [ENDORSED]
Which was the equation given for dipole moments?
- Sun Nov 11, 2018 11:01 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: polarizing power of a cation
- Replies: 3
- Views: 358
polarizing power of a cation
can someone explain the polarizing power of a cation? Does it follow a trend on the periodic table? Does it apply for compounds?
- Sun Nov 11, 2018 10:42 pm
- Forum: Electronegativity
- Topic: Greater Ionic character
- Replies: 3
- Views: 507
Greater Ionic character
for this hw question 3.77 "For each pair, determine which compound has bonds with greater ionic character: (a) HCl or HI; (b) CH4 or CF4; (c) CO2 or CS2", I understand we need to choose the compound that has a greater difference in electronegativites between its atoms, but for letter c how...
- Sun Nov 04, 2018 11:59 pm
- Forum: Lewis Structures
- Topic: Lewis acids and bases
- Replies: 1
- Views: 232
Lewis acids and bases
Do we need to know Lewis acids and bases for the midterm?
- Sun Nov 04, 2018 11:10 pm
- Forum: Trends in The Periodic Table
- Topic: 6th Edition 2.71
- Replies: 4
- Views: 328
Re: 6th Edition 2.71
Is this something we should worry for the midterm?
- Sun Nov 04, 2018 9:22 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: Heisenburg equation units
- Replies: 2
- Views: 389
Heisenburg equation units
When using the Heisenberg uncertainty, what are the correct units to use for the components of the equations? (mass, velocity, distance, etc.)
- Sun Oct 28, 2018 8:01 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: electron configuration of tungsten
- Replies: 1
- Views: 3579
electron configuration of tungsten
Can someone please explain to me how to get the electron configuration of Tungsten[W]? I know what the answer is but I just do not know how to get there
- Sun Oct 28, 2018 6:40 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Z effective 2.37
- Replies: 1
- Views: 625
Z effective 2.37
can someone please explain to me how effective nuclear charge works in terms of 2.37. Thanks! "Which of the following statements are true for many- electron atoms? If false, explain why. (a) The effective nuclear charge Zeff is independent of the number of electrons present in an atom. (b) Elec...
- Tue Oct 23, 2018 10:29 pm
- Forum: DeBroglie Equation
- Topic: deriving DeBroglie
- Replies: 2
- Views: 264
deriving DeBroglie
Can someone show me how to derive the DeBroglie equation? I am looking back in my notes and I must have written something down wrong because it is not making sense
- Sun Oct 21, 2018 1:43 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: 6th edition 2.1
- Replies: 1
- Views: 160
6th edition 2.1
Here is the question for reference: Which of the following increase when the electron in a hydrogen atom undergoes a transition from the 1s-orbital to a 2p-orbital? (a) Energy of the electron. (b) Value of n. (c) Value of l. (d) Radius of the atom. Can someone explain to me how we would determine th...
- Tue Oct 16, 2018 8:56 pm
- Forum: Properties of Light
- Topic: Finding energy
- Replies: 1
- Views: 199
Finding energy
If you are given the number of photons produced (per second) and the wavelength of the light, how would you find how much energy (in joules) is produced as radiation at that wavelength? (referring to 1.59 in the 6th edition)
- Sun Oct 14, 2018 9:03 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: 6th edition 1.15
- Replies: 2
- Views: 134
6th edition 1.15
I am having trouble figuring this out: 1.15 says "In the ultraviolet spectrum of atomic hydrogen, a line is observed at 102.6 nm. Determine the values of n for the initial and final energy levels of the electron during the emission of energy that leads to this spectral line." I understand ...
- Sun Oct 14, 2018 7:43 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: E(n)=-hR/n^2
- Replies: 3
- Views: 195
Re: E(n)=-hR/n^2
What does the 'h' represent here in this equation?
Sorry, disregard this question. I knew it was Planck's constant, just had it rounded in my notes
Sorry, disregard this question. I knew it was Planck's constant, just had it rounded in my notes
- Sun Oct 14, 2018 6:39 pm
- Forum: Properties of Light
- Topic: wavelengths and energy of a photon
- Replies: 2
- Views: 375
wavelengths and energy of a photon
Is there any relationship between the size of a wavelength and the energy of a photon? Or is the energy of a photon only relative to the frequency of a wave because of the equation E=hv?
- Sun Oct 07, 2018 9:34 pm
- Forum: Limiting Reactant Calculations
- Topic: M.7
- Replies: 1
- Views: 153
M.7
can anyone help with M.7 in the sixth edition? I think I am doing something wrong with converting the masses to moles that is preventing me from figuring out the rest of the problem
- Thu Oct 04, 2018 9:33 pm
- Forum: Limiting Reactant Calculations
- Topic: Calculating reactant moles [ENDORSED]
- Replies: 4
- Views: 373
Re: Calculating reactant moles [ENDORSED]
M.3 in the sixth edition!
- Thu Oct 04, 2018 9:26 pm
- Forum: Limiting Reactant Calculations
- Topic: Calculating reactant moles [ENDORSED]
- Replies: 4
- Views: 373
Calculating reactant moles [ENDORSED]
Can someone explain the step of calculating reactant moles when solving a stoichiometry problem. In other words, I do not understand the "why" behind the calculations of this step.
- Wed Oct 03, 2018 9:40 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: V=n/c
- Replies: 7
- Views: 8889
V=n/c
In the equation V=n/c, what does the 'n' represent?