Search found 108 matches
- Sun Mar 15, 2020 1:35 pm
- Forum: General Rate Laws
- Topic: Differential rate law
- Replies: 1
- Views: 202
Re: Differential rate law
Usually the integrated rate law is more applicable I believe.
- Sat Mar 14, 2020 6:51 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Endgame 15b
- Replies: 5
- Views: 429
Endgame 15b
Can someone explain question 15b on Endgame? The lab finds that with these conditions, yield a pseudo rate constant k'. Show how k' is related to the real overall rate constant k. I am a little confused what the significance of a pseudo rate constant is. I also just don't understand the solution giv...
- Thu Mar 12, 2020 7:30 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Catalysts and Rates
- Replies: 10
- Views: 697
Re: Catalysts and Rates
Question 7.17E asks whether a catalyst accelerating the third step of a three step reaction would increase the overall rate of reaction. Why is the answer no?
- Thu Mar 12, 2020 6:40 pm
- Forum: *Enzyme Kinetics
- Topic: Catalysts in a reaction
- Replies: 12
- Views: 1720
Re: Catalysts in a reaction
How can you tell the difference between a catalyst and an intermediary?
- Thu Mar 12, 2020 6:08 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: 7D.5
- Replies: 3
- Views: 319
Re: 7D.5
Can someone explain the difference between K2/K1 and K'/K1? I thought the latter was equivalent to the equilibrium constant, is the former also? (are they just the same)
- Tue Mar 10, 2020 11:51 pm
- Forum: Administrative Questions and Class Announcements
- Topic: What is the plan for the final?
- Replies: 16
- Views: 1083
Re: What is the plan for the final?
Does that mean the midterm is going to be wayyyyyy more influential to our grade than it would have been?
- Sun Mar 08, 2020 10:18 pm
- Forum: General Rate Laws
- Topic: Fractional order and negative orders
- Replies: 3
- Views: 351
Re: Fractional order and negative orders
Is there a way to determine? I figured it would have to be given.
- Sun Mar 08, 2020 10:06 pm
- Forum: General Rate Laws
- Topic: units
- Replies: 12
- Views: 687
Re: units
There is a chart explaining this on page 595 of the textbook
- Sun Mar 08, 2020 10:02 pm
- Forum: Zero Order Reactions
- Topic: Identifying Zero vs. First vs. Second Order Reactions
- Replies: 7
- Views: 584
Re: Identifying Zero vs. First vs. Second Order Reactions
In zeroth order, rate is independent of concentration of reactant so long as it is present in some quantity, in first rate is linearly dependent etc.
- Sun Mar 08, 2020 9:48 pm
- Forum: General Rate Laws
- Topic: unique average rate vs general reaction rate
- Replies: 2
- Views: 238
Re: unique average rate vs general reaction rate
with unique average rates, you also don't have to specify the species
- Sun Mar 08, 2020 9:38 pm
- Forum: Kinetics vs. Thermodynamics Controlling a Reaction
- Topic: Study Advice
- Replies: 73
- Views: 7463
Re: Study Advice
Lyndon's reviews!!
- Sun Mar 01, 2020 8:33 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: 6N.3
- Replies: 6
- Views: 513
Re: 6N.3
I am confused as to how the cathode/anode were determined. I thought they were interchangeable but if they were flipped, wouldn't this cause Q to be flipped as well?
- Sat Feb 29, 2020 9:58 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6.M.11 (d)
- Replies: 1
- Views: 155
6.M.11 (d)
How do you find the half reaction for O2/O3, OH-? I know that the standard potentials are listed with the equations, in the appendix but I was wondering how to find this half reaction without looking in the back.
- Sat Feb 29, 2020 9:23 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6M.5
- Replies: 2
- Views: 250
Re: 6M.5
Why is deltaG in Kj/mol in the answer... wouldn't number of moles (n) cancel with the moles in F?
- Sat Feb 29, 2020 2:40 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6M.1
- Replies: 5
- Views: 509
Re: 6M.1
Why is the cell diagram reversed when the potential is negative? Is it because reversing is the only way to make the reaction favorable/spontaneous?
- Sat Feb 29, 2020 2:16 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: hydrogen electrodes
- Replies: 3
- Views: 225
Re: hydrogen electrodes
The book lists the example: Pt(s)|H2(g)|H+(aq)||Zn2+(aq)|Zn(s), and states that the hydrogen electrode on the left is found to be the cathode. However, in another example, Pt(s)|H2(g)|H+(aq)||Cu2+(aq)|Cu(s), Cu is the cathode. Why is this/ how can you determine when the hydrogen electrode is the cat...
- Fri Feb 28, 2020 10:39 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6L9
- Replies: 2
- Views: 274
Re: 6L9
Potassium and chlorine aren't used in the reaction because they are spectator ions, and their oxidation states don't change.
- Thu Feb 27, 2020 10:23 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6L.7
- Replies: 3
- Views: 261
Re: 6L.7
Write the half-reactions and devise a galvanic cell (write a cell diagram) to study each of the following reactions: (b) H+(aq) + OH-(aq) ------> H20(l) the Brønsted neutralization reaction I got the correct answer for E standard, but I don't understand why oxygen is included in the cell diagram in ...
- Sun Feb 23, 2020 8:12 pm
- Forum: Balancing Redox Reactions
- Topic: 6K.1
- Replies: 6
- Views: 358
Re: 6K.1
Also how does oxidation state factor into balancing?
- Sun Feb 23, 2020 8:10 pm
- Forum: Balancing Redox Reactions
- Topic: 6K.1
- Replies: 6
- Views: 358
Re: 6K.1
Wait, hasn't Cr been oxidized because it has lost electrons not gained them (went from 2- to 3+)?
- Sun Feb 23, 2020 8:08 pm
- Forum: Balancing Redox Reactions
- Topic: Balancing redox
- Replies: 6
- Views: 551
Re: Balancing redox
If it is alkaline, why would you balance it first acidically?
- Sun Feb 23, 2020 8:00 pm
- Forum: Balancing Redox Reactions
- Topic: Balancing Reactions: Acid vs Base
- Replies: 3
- Views: 339
Re: Balancing Reactions: Acid vs Base
There is a difference: In acidic, balance O with H2O and H with H+, in basic it is more complicated but explained in Toolbox 6.K1
- Sun Feb 23, 2020 7:54 pm
- Forum: Balancing Redox Reactions
- Topic: Half Reactions
- Replies: 12
- Views: 889
Re: Half Reactions
I don't think the oxidizing/reducing agents are explicit in the half reactions, rather there is a focus on what gains/loses electrons.
- Fri Feb 14, 2020 6:20 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 4027135
Re: Post All Chemistry Jokes Here
Why was 6.62607004 × 10-34 m2 kg / s super ripped?
because he did a lot of Plank
because he did a lot of Plank
- Fri Feb 14, 2020 6:19 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Bomb Calorimeter
- Replies: 5
- Views: 926
Re: Bomb Calorimeter
Also, within the context of the isolated system, the change in entropy would equal zero, meaning that qsysystem= -qsurroundings, or would that be incorrect?
- Fri Feb 14, 2020 6:17 pm
- Forum: Ideal Gases
- Topic: ideal gas
- Replies: 5
- Views: 374
Re: ideal gas
How do properties of different ideal gases vary if they are essentially hypothetical?
- Fri Feb 14, 2020 6:16 pm
- Forum: Balancing Redox Reactions
- Topic: Redox reaction
- Replies: 5
- Views: 1067
Re: Redox reaction
This was very helpful! I had the same question.
- Wed Feb 12, 2020 9:34 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Homework 4A13
- Replies: 5
- Views: 247
Re: Homework 4A13
Under what conditions would q =-cal?
- Sun Feb 09, 2020 11:16 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: HW 4F.1
- Replies: 5
- Views: 226
Re: HW 4F.1
Actually I figured it out, it's because the system is losing energy and the surroundings are gaining energy, (-deltaSsys = deltaSsurr).
- Sun Feb 09, 2020 11:13 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: HW 4F.1
- Replies: 5
- Views: 226
Re: HW 4F.1
The answer key states that rate of entropy generation = - rate of heat generation/T. Why is this negative? The final answer is positive.
- Sun Feb 09, 2020 10:58 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Entropy of transition
- Replies: 8
- Views: 441
Re: Entropy of transition
would this same concept apply to standard entropy of fusion?
- Sun Feb 09, 2020 10:55 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: Entropy of transition
- Replies: 8
- Views: 441
Re: Entropy of transition
When deltaH is only given at temperature of vaporization.
- Sun Feb 09, 2020 10:32 pm
- Forum: Concepts & Calculations Using Second Law of Thermodynamics
- Topic: q rev
- Replies: 9
- Views: 351
Re: q rev
When using deltaS = qrev/T to derive the equation for entropy under isothermal and isobaric conditions, work is used in replacementf for qrev. Why is this, and why does the equation end up being positive when work is negative?
- Sun Feb 02, 2020 5:16 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: 4A.7
- Replies: 3
- Views: 141
Re: 4A.7
What is the answer to this problem for part b?
- Sun Feb 02, 2020 5:09 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: 4A.7
- Replies: 3
- Views: 164
Re: 4A.7
Is it possible to do this problem by finding total mass and only applying mcdeltaT once, or would that not work because of different heat capacities?
- Sun Feb 02, 2020 4:14 pm
- Forum: Calculating Work of Expansion
- Topic: Reversible and Irreversible
- Replies: 5
- Views: 219
Re: Reversible and Irreversible
The book states:
"work done during a reversible expansion of a gas is the maximum expansion work possible". Why is this true?
"work done during a reversible expansion of a gas is the maximum expansion work possible". Why is this true?
- Sun Feb 02, 2020 4:10 pm
- Forum: Calculating Work of Expansion
- Topic: Reversible Processes
- Replies: 3
- Views: 145
Re: Reversible Processes
When the external pressure is constant (Pex), this is an irreversible process. When external pressure changes slightly so Pex always equals Pin, then the reaction is reversible.
- Sun Feb 02, 2020 4:02 pm
- Forum: Calculating Work of Expansion
- Topic: Reversible vs Irreversible process
- Replies: 2
- Views: 178
Re: Reversible vs Irreversible process
According to the book, a reversible process in terms of thermodynamics is reversed by a very small change in a variable. However, I don't really understand conceptually the difference between this and an irreversible process. Can someone explain the theory behind this?
- Sun Jan 26, 2020 1:44 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: 4D.3
- Replies: 1
- Views: 177
4D.3
Can someone explain how to solve this problem? The reaction of 1.40 g of carbon monoxide with excess water vapor to produce carbon dioxide and hydrogen gases in a bomb calorimeter causes the temperature of the calorimeter assembly to rise from 22.113 8C to 22.799 8C. The calorimeter assembly is know...
- Sun Jan 26, 2020 1:07 pm
- Forum: Phase Changes & Related Calculations
- Topic: Superheating and Supercooling
- Replies: 2
- Views: 165
Re: Superheating and Supercooling
Does superheating/supercooling only happen with pure substances?
- Sun Jan 26, 2020 12:59 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: bomb calorimeter
- Replies: 5
- Views: 326
Re: bomb calorimeter
Is a bomb calorimeter an isolated system?
- Sun Jan 26, 2020 12:52 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: Heat Capacity
- Replies: 7
- Views: 411
Re: Heat Capacity
The book states that "The constant-volume and constant-pressure heat capacities of a solid substance are similar; the same is true of a liquid but not of a gas". Why is this not true for a gas?
- Sun Jan 26, 2020 12:44 pm
- Forum: Phase Changes & Related Calculations
- Topic: Reading?
- Replies: 5
- Views: 335
Re: Reading?
Considering we've only had 2 lectures, I've only read 4.C and 4.D.
- Sun Jan 19, 2020 4:42 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: When to omit "x-term"
- Replies: 6
- Views: 406
Re: When to omit "x-term"
Why can we do this? I understand that the rule exists, but I'm wondering if someone can explain how a small K correlates to a negligible x.
- Sun Jan 19, 2020 4:05 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 5I.27
- Replies: 8
- Views: 448
Re: 5I.27
Can someone solve this whole problem? I keep doing it and coming up with the wrong answer.
- Sun Jan 19, 2020 3:54 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 11.59
- Replies: 2
- Views: 910
Re: 11.59
Calculate Q first, which should produce a value of Q = 0.75. Because Q < Kc, the reaction proceeds in the forward direction, so reactants will lose concentration while products will gain concentration. Then do the ICE table and use quadratic equation to find Kc.
- Sun Jan 19, 2020 3:41 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: 5.I.23
- Replies: 3
- Views: 157
5.I.23
In this problem: A reaction mixture consisting of 2.00 mol CO and 3.00 mol H2 is placed in a reaction vessel of volume 10.0 L and heated to 1200. K. At equilibrium, 0.478 mol CH4 was present in the system. Determine the value of Kc for the reaction CO(g) 1 3 H2(g) ∆ CH4(g) 1 H2O(g) at 1200. K. would...
- Sat Jan 18, 2020 6:55 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: HW Q 6th ed. 11.53
- Replies: 5
- Views: 1036
Re: HW Q 6th ed. 11.53
Why would you not convert to P and calculate Kp?
- Sun Jan 12, 2020 9:03 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Concentration
- Replies: 5
- Views: 170
Concentration
does a change in concentration cause Kc to change?
- Sun Jan 12, 2020 8:56 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Concentrations and the K value.
- Replies: 7
- Views: 433
Re: Concentrations and the K value.
So is this why when the amount of reactant is increased, K remains the same for the reaction?
- Sun Jan 12, 2020 5:38 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: When to use Kc vs Kp
- Replies: 7
- Views: 244
Re: When to use Kc vs Kp
what would happen if the reactant(s) and/or products are different states?
- Sun Jan 12, 2020 5:35 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Finding K: liquids and aqueous
- Replies: 7
- Views: 270
Re: Finding K: liquids and aqueous
Is this the same case for solids?
- Sun Jan 12, 2020 5:34 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Different types of K
- Replies: 9
- Views: 322
Re: Different types of K
How do you convert from Kc to Kp?
- Sat Dec 07, 2019 10:55 pm
- Forum: Lewis Acids & Bases
- Topic: Lewis vs Bronsted
- Replies: 7
- Views: 659
Re: Lewis vs Bronsted
Is a lewis acid/base always a bronsted acid and vice-versa?
- Wed Dec 04, 2019 1:51 pm
- Forum: Properties & Structures of Inorganic & Organic Bases
- Topic: Stronger Acid 6C.21
- Replies: 3
- Views: 253
Re: Stronger Acid 6C.21
how does the Ch3 contribute electron density towards the O-H bond?
- Wed Dec 04, 2019 1:43 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Application of Electronegativity to Acid Strength
- Replies: 3
- Views: 858
Re: Application of Electronegativity to Acid Strength
^I am also wondering this... I saw another question asking whether HClO or HCLO2 is a stronger acid, I thought it was HCLO2 because more oxygen atoms are attached to the central atom, but the answer was HClO2 because ClO2- is more stable.
- Tue Dec 03, 2019 10:06 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 4027135
Re: Post All Chemistry Jokes Here
Little Billy was a chemist
Little Billy is no more
What he thought was H2O
was really H2SO4!
Little Billy is no more
What he thought was H2O
was really H2SO4!
- Tue Dec 03, 2019 8:44 pm
- Forum: Coordinate Covalent Bonds
- Topic: chelating ligands
- Replies: 1
- Views: 286
chelating ligands
How do you draw diethylenetriammine chelating?
- Tue Dec 03, 2019 8:43 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: chelating ligands [ENDORSED]
- Replies: 51
- Views: 102227
Re: chelating ligands [ENDORSED]
How do you draw diethylenetriammine chelating?
- Tue Dec 03, 2019 12:50 pm
- Forum: Biological Examples
- Topic: cisplatin
- Replies: 5
- Views: 444
Re: cisplatin
How do the Cl atoms attach to the DNA?
- Sun Dec 01, 2019 5:46 pm
- Forum: Lewis Acids & Bases
- Topic: 6A.13
- Replies: 7
- Views: 379
Re: 6A.13
What would H- be considered?
- Sun Dec 01, 2019 4:11 pm
- Forum: Bronsted Acids & Bases
- Topic: J9
- Replies: 3
- Views: 292
Re: J9
is the answer to part a CH3COOK?
- Sun Dec 01, 2019 3:53 pm
- Forum: Bronsted Acids & Bases
- Topic: J.7
- Replies: 8
- Views: 494
Re: J.7
I don't understand part b... I know that N is more electronegative than Zn so Zn(OH) must be the bronsted base, but I don't understand why it is Zn(OH)2.
- Sun Dec 01, 2019 3:18 pm
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Acid Strength
- Replies: 6
- Views: 437
Re: Acid Strength
Why does losing one hydrogen make H22So4 a weaker acid?
- Sun Dec 01, 2019 3:07 pm
- Forum: Lewis Acids & Bases
- Topic: Define Acid and Base
- Replies: 7
- Views: 819
Re: Define Acid and Base
If sodium metal produces OH- ions when it reacts with water, why is it not considered a base?
- Sat Nov 30, 2019 10:09 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordinate covalent bonds
- Replies: 4
- Views: 228
Re: Coordinate covalent bonds
In carbon monoxide, is one of the bonds a coordinate covalent bond? I read somewhere that it was but there is no transition metal involved.
- Sat Nov 30, 2019 10:01 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Coordination compound
- Replies: 5
- Views: 209
Re: Coordination compound
What is the difference between a complex ion and a coordination compound?
- Sun Nov 24, 2019 4:24 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Octahedral
- Replies: 2
- Views: 307
Re: Octahedral
Right but the book says that the most common complexes have a coordination number of 6, why is that?
- Sun Nov 24, 2019 4:21 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Substitution reaction
- Replies: 1
- Views: 177
Substitution reaction
what is a substitution reaction and under what conditions does it take place?
- Sun Nov 24, 2019 4:16 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Transition Metals
- Replies: 3
- Views: 241
Re: Transition Metals
Does it also have something to do with the variable valencies of transition metals and flexibility in oxidation states?
- Sun Nov 24, 2019 4:01 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Ligand
- Replies: 4
- Views: 342
Re: Ligand
From what I understand a Ligand is a lewis base that forms at least one coordinate covalent bond with the central atom which is generally a d block element.
- Mon Nov 18, 2019 6:28 pm
- Forum: Hybridization
- Topic: hybridization
- Replies: 4
- Views: 367
Re: hybridization
Why are terminal atoms not regarded as hybridized?
- Sun Nov 17, 2019 2:54 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lone Pairs
- Replies: 5
- Views: 331
Re: Lone Pairs
Also, how can you predict whether a lone pair will be axial or equatorial?
- Sun Nov 17, 2019 2:43 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Lone Pairs
- Replies: 5
- Views: 331
Re: Lone Pairs
Why are lone pairs important in identifying shape when only the position of atoms are considered when naming the shape?
- Sun Nov 17, 2019 1:32 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR
- Replies: 6
- Views: 406
Re: VSEPR
Why are different strength bonds treated the same when applying VSEPR?
- Sun Nov 17, 2019 1:26 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: regions of electron density
- Replies: 10
- Views: 552
Re: regions of electron density
Why is knowing the number of regions of electron density necessary when naming a molecule?
- Mon Nov 11, 2019 8:58 pm
- Forum: Dipole Moments
- Topic: Textbook question 3F.1
- Replies: 5
- Views: 328
Re: Textbook question 3F.1
I am also confused about this
- Sat Nov 02, 2019 10:30 pm
- Forum: Lewis Structures
- Topic: 2.B.11
- Replies: 2
- Views: 251
2.B.11
How is the lewis structure for H2C(NH2)COOH determined?
- Sat Nov 02, 2019 10:18 pm
- Forum: Lewis Structures
- Topic: 2B. 9
- Replies: 3
- Views: 242
Re: 2B. 9
How do you do part a, with ammonium chloride ?
- Sat Nov 02, 2019 10:16 pm
- Forum: Lewis Structures
- Topic: Midterm Topics
- Replies: 8
- Views: 285
Re: Midterm Topics
Will we have to know how to draw the lewis structure of a molecule given only the name of the molecule?
- Sat Nov 02, 2019 10:03 pm
- Forum: Lewis Structures
- Topic: 2B. 3 part d
- Replies: 4
- Views: 267
Re: 2B. 3 part d
Why can Br have 10 electrons, instead of 8?
- Sat Nov 02, 2019 9:41 pm
- Forum: Lewis Structures
- Topic: Resonance Hybrids
- Replies: 3
- Views: 182
Re: Resonance Hybrids
Can someone explain delocalized electrons?
- Sat Nov 02, 2019 9:33 pm
- Forum: Lewis Structures
- Topic: drawing lewis structures
- Replies: 5
- Views: 224
Re: drawing lewis structures
Why is the atom at the center of a lewis structure the one with the lowest ionization energy?
- Sun Oct 27, 2019 4:30 pm
- Forum: Ionic & Covalent Bonds
- Topic: 2A.23
- Replies: 5
- Views: 197
Re: 2A.23
Why is part C AlH3?
- Sun Oct 27, 2019 3:31 pm
- Forum: Ionic & Covalent Bonds
- Topic: Lattice Energy
- Replies: 2
- Views: 202
Lattice Energy
Can someone explain why the difference between a compound of widely separated gases and tightly compacted ones is so drastically different?
- Sun Oct 27, 2019 3:19 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Block Confusion
- Replies: 4
- Views: 201
Re: Block Confusion
Why does gallium form Ga 3+ with the configuration [Ar]3d10?
- Sun Oct 27, 2019 3:07 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Noble gas electron configurations
- Replies: 3
- Views: 204
Noble gas electron configurations
according the textbook, when sodium loses an electron (Na) - (Na +), the result has an electron configuration similar to neon, which is 1s1, 2s2, 2p6. Why does neon have this configuration, with only 1 electron in the 1s subshell?
- Fri Oct 25, 2019 8:20 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron Configurations
- Replies: 5
- Views: 239
Re: Electron Configurations
In what scenario would a valence configuration be used over an electron configuration?
- Fri Oct 25, 2019 8:15 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Homework Question. 2.51 [ENDORSED]
- Replies: 5
- Views: 5069
Re: Homework Question. 2.51 [ENDORSED]
How do you draw an aufbau structure?
- Fri Oct 25, 2019 8:04 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: 1E. 21
- Replies: 1
- Views: 176
1E. 21
Can someone help me with this problem?
Predict the number of valence electrons present in each of the following atoms (include the outermost d-electrons): (a) Ta; (b) Tc; (c) Te; (d) Tl.
Predict the number of valence electrons present in each of the following atoms (include the outermost d-electrons): (a) Ta; (b) Tc; (c) Te; (d) Tl.
- Sun Oct 20, 2019 4:14 pm
- Forum: Quantum Numbers and The H-Atom
- Topic: Quantum Numbers
- Replies: 9
- Views: 413
Re: Quantum Numbers
why are higher orbitals (g-,h- etc) not used by chemists in practice?
- Sun Oct 20, 2019 3:55 pm
- Forum: *Shrodinger Equation
- Topic: Wave functions
- Replies: 9
- Views: 384
Re: Wave functions
what is the relationship between wave functions and orbital shapes?
- Sun Oct 20, 2019 3:46 pm
- Forum: *Shrodinger Equation
- Topic: Schrodinger Equation
- Replies: 3
- Views: 319
Re: Schrodinger Equation
I don't really understand, conceptually, how the Schrodinger Equation was derived and proven. Can someone explain?
- Sun Oct 20, 2019 3:39 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: 1.B.25
- Replies: 1
- Views: 136
1.B.25
Question 1.B.25 asks " What is the minimum uncertainty in the speed of an electron confined within a lead atom of diameter 350. pm? Model the atom as a one-dimensional box with a length equal to the diameter of the actual atom."
What does it mean by model the atom as a one-dimensional box?
What does it mean by model the atom as a one-dimensional box?
- Sun Oct 20, 2019 3:31 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: 1.B #27
- Replies: 4
- Views: 308
Re: 1.B #27
Wouldn't the total uncertainty be 10 m/s, because the uncertainty is 5.00 m/s +/- 5.0 m/s?
- Sun Oct 13, 2019 3:31 pm
- Forum: Properties of Light
- Topic: problem 1A.15
- Replies: 4
- Views: 219
Re: problem 1A.15
How would you do this problem if the Lyman series did not apply?
- Sun Oct 13, 2019 3:11 pm
- Forum: Properties of Light
- Topic: problem 1A.15
- Replies: 4
- Views: 219
Re: problem 1A.15
Can you explain the reason we know the correlation between UV light and the fact that n1 = 1?
- Sat Oct 12, 2019 4:14 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Effect
- Replies: 3
- Views: 169
Re: Photoelectric Effect
If that is true ( if excess energy is used to emit electrons and since the electrons are moving, the excess energy is basically manifested as the kinetic energy of the electron) then what would be the kinetic energy when the threshold energy is met exactly?
- Sat Oct 12, 2019 4:05 pm
- Forum: Photoelectric Effect
- Topic: Planck's Constant
- Replies: 4
- Views: 174
Re: Planck's Constant
How was the actual value of Planck's constant derived?
- Sat Oct 12, 2019 3:55 pm
- Forum: Properties of Light
- Topic: Light Intensity
- Replies: 6
- Views: 219
Re: Light Intensity
One thinking point in the texbook asked why ultraviolet radiation is much more harmful to living tissue than infared radiation... I was wondnerinf if someone could explain the answer.