- Видео 20
- Просмотров 266 255
Andrew McKinley
Великобритания
Добавлен 19 ноя 2009
Hi there, welcome to my channel.
This channel mostly focusses on my instructional videos for chemical physics / physical chemistry, but I can't guarantee there won't be the occasional oddball video!
Anyway - subscribe, learn, enjoy.
-A.
This channel mostly focusses on my instructional videos for chemical physics / physical chemistry, but I can't guarantee there won't be the occasional oddball video!
Anyway - subscribe, learn, enjoy.
-A.
Quantum Chemistry 7
Seventh and final content video for the Quantum Chemistry course
Table of Contents:
00:07 - The story so far…
00:57 - The Hydrogen Atom
01:28 - Energies in hydrogen atom
02:16 - Particle in a 3-D box
03:56 - Visualising (r,φ,θ)
05:39 - A spherical harmonic?
06:24 - Atomic orbitals
07:14 - Radial distribution functions
08:33 - Radial and angular combined
10:42 - The Quantum Atom
11:32 -
12:09 - The Quantum Atom
12:31 - Quantum Chemistry: A summary
13:21 - Models in Quantum Chemistry (1)
13:58 - Models in Quantum Chemistry (2)
Table of Contents:
00:07 - The story so far…
00:57 - The Hydrogen Atom
01:28 - Energies in hydrogen atom
02:16 - Particle in a 3-D box
03:56 - Visualising (r,φ,θ)
05:39 - A spherical harmonic?
06:24 - Atomic orbitals
07:14 - Radial distribution functions
08:33 - Radial and angular combined
10:42 - The Quantum Atom
11:32 -
12:09 - The Quantum Atom
12:31 - Quantum Chemistry: A summary
13:21 - Models in Quantum Chemistry (1)
13:58 - Models in Quantum Chemistry (2)
Просмотров: 8 498
Видео
Quantum Chemistry 6
Просмотров 6015 лет назад
Table of Contents: 00:17 - Vibrational quanta 00:59 - The Quantum harmonic oscillator 01:29 - The Quantum harmonic oscillator 02:17 - Revisiting the Schrödinger equation 03:21 - Vibrational wavefunctions 04:53 - Vibrational probabilities 05:54 - Application to Diatomics
Quantum Chemistry 5
Просмотров 7185 лет назад
Fifth video for the Quantum Chemistry course Table of Contents: 00:06 - A quick recap… 00:37 - Continuing the story 01:26 - Rotations: Particle on a ring 03:03 - Identify the boundary conditions 04:45 - Boundary conditions: Continuity 05:51 - Other exceptions 07:13 - General wavefunction for rotations 08:20 - Visualising cyclic wavefunctions 10:13 - Energy levels in rotational systems 11:24 - E...
Quantum Chemistry 4
Просмотров 6225 лет назад
Live link 1: academo.org/demos/3d-surface-plotter/?expression=sin(1*x)*sin(0.5*y)&xRange=0,6.28&yRange=0,6.28&resolution=50 Live link 2: ruclips.net/video/v4ELxKKT5Rw/видео.html Table of Contents: 00:11 - Extending to two dimensions 01:14 - 2-D wavefunctions to calculate 08:48 - Particle on a 2-D surface 09:25 - Particle on a 2-D surface 09:39 - Particle on a 2-D surface - Lx > Ly 10:42 - Parti...
Quantum Chemistry 3.5: Normalising the wavefunction
Просмотров 5435 лет назад
Supporting video showing how to normalise a wavefunction Table of Contents: 00:05 - Locating the particle 01:03 - Normalise the wavefunction 1 01:57 - Normalise the wavefunction 2 03:17 - Normalise the wavefunction 3 05:21 - The final wavefunction
Quantum Chemistry 3
Просмотров 7065 лет назад
Third video for the Quantum Chemistry course Table of Contents: 00:10 - A quick recap… 00:58 - Energies in the box 02:15 - Energies in the box 02:36 - Energies in the box 04:46 - Progression of energies 05:44 - Application to molecular systems 06:38 - Calculation 10:06 - Locating the particle 12:06 - Finding the particle 12:32 - Probability of finding the particle 13:55 - Particle in 1-D box - ...
Quantum Chemistry 1
Просмотров 1,9 тыс.5 лет назад
Table of Contents: 00:06 - Hydrogen line spectra 00:33 - Hydrogen emission 01:09 - A general solution 01:33 - Energy Quantisation 01:59 - Energy Quantisation 02:10 - The Bohr atom 02:50 - An Overview of Quantum Chemistry 03:31 - A quick recap… Waves and Particles 04:10 - Describing particles as waves 05:05 - The wavefunction in Quantum Mechanics 06:30 - The wavefunction: Interpretations 07:38 -...
Molecular Driving Forces 7
Просмотров 1 тыс.5 лет назад
Final flipped video for the Molecular Driving Forces course Table of Contents: 00:08 - Free Energies 00:56 - Helmholtz Free Energy 01:38 - Constant volume entropy consideration 02:42 - Variable volume example 04:20 - Variable volume example 05:07 - Variable volume example 05:57 - Variable volume example 06:34 - Gibbs Free Energy 07:05 - Gibbs Free Energy 08:03 - Balancing entropy and enthalpy 0...
Quantum Chemistry 2
Просмотров 8215 лет назад
Table of Contents: 00:08 - Translational motion 01:03 - Picturing the particle in a box 01:48 - About the “box” 02:41 - About the “particle” 04:14 - Energy considerations 05:01 - Quick aside: Eigen functions 05:43 - Some practice… 06:40 - Solving the Schrödinger equation 07:34 - Which function to use? 08:33 - Visualising the wavefunction 09:31 - Quantisation of wavelengths 11:17 - Summary
Further Physical Chemistry: Electrochemistry session 8
Просмотров 36 тыс.5 лет назад
Further Physical Chemistry: Electrochemistry session 8
Further Physical Chemistry: Electrochemistry session 4
Просмотров 14 тыс.5 лет назад
The fourth video supporting the electrochemistry content from Further Physical Chemistry. This course is based heavily on my undergraduate learnings from CP Wilde, Department of Chemistry, Imperial College London in the early 2000s! Table of Contents: 00:09 - Factors affecting ion transport 00:51 - The Electric field, E 01:45 - The Electric field, E 03:10 - Drag forces 04:10 - Ionic drift speed...
Further Physical Chemistry: Electrochemistry session 9
Просмотров 20 тыс.5 лет назад
The ninth video supporting the electrochemistry content from Further Physical Chemistry. This course is based heavily on my undergraduate learnings from CP Wilde, Department of Chemistry, Imperial College London in the early 2000s! Table of Contents: 00:05 - The overpotential: A recap 00:50 - Overpotentials and galvanic cells 01:41 - Cell performance with overpotential 02:39 - Cell performance ...
Further Physical Chemistry: Electrochemistry session 6 SHORT
Просмотров 6 тыс.5 лет назад
This is the sixth video supporting the Electrochemistry topic in Further Physical Chemistry; it does not include the full walkthrough calculations. The full video is available here: ruclips.net/video/1pVmm_QvVqw/видео.html . This course is based heavily on my undergraduate learnings from CP Wilde, Department of Chemistry, Imperial College London in the early 2000s! Table of Contents: 00:07 - El...
Further Physical Chemistry: Electrochemistry session 5
Просмотров 12 тыс.5 лет назад
This is the fifth video supporting the Electrochemistry topic in Further Physical Chemistry. This course is based heavily on my undergraduate learnings from CP Wilde, Department of Chemistry, Imperial College London in the early 2000s! Table of Contents: 00:08 - What is “Potential” 01:53 - “Potential” vs “electron” energies 02:43 - “Potential Difference” 03:29 - Electrochemical potential 04:33 ...
Further Physical Chemistry: Electrochemistry session 10
Просмотров 87 тыс.5 лет назад
The tenth video supporting the electrochemistry content from Further Physical Chemistry. This course is based heavily on my undergraduate learnings from CP Wilde, Department of Chemistry, Imperial College London in the early 2000s! Table of Contents: 00:10 - Voltammetry: I vs E 01:16 - Voltammetry principles 02:44 - Concentration polarization 1 03:25 - Concentration polarization 2 04:03 - Conce...
Further Physical Chemistry: Electrochemistry session 3
Просмотров 13 тыс.5 лет назад
This is the third video supporting the Electrochemistry topic in Further Physical Chemistry. This course is based heavily on my undergraduate learnings from CP Wilde, Department of Chemistry, Imperial College London in the early 2000s! Table of Contents: 00:05 - Ions in solution 00:41 - Mobility in solutions 01:33 - Electrical concepts 02:43 - Solution conductivity 03:30 - Measuring conductivit...
Further Physical Chemistry: Electrochemistry session 7
Просмотров 15 тыс.5 лет назад
Further Physical Chemistry: Electrochemistry session 7
Further Physical Chemistry: Electrochemistry session 1
Просмотров 25 тыс.5 лет назад
Further Physical Chemistry: Electrochemistry session 1
Further Physical Chemistry: Electrochemistry session 6 FULL
Просмотров 9 тыс.5 лет назад
Further Physical Chemistry: Electrochemistry session 6 FULL
Further Physical Chemistry: Electrochemistry session 2
Просмотров 14 тыс.5 лет назад
Further Physical Chemistry: Electrochemistry session 2
Can we get this lectures in PDF?
Great video!
you are good at teaching. thank you.
Really good series. Thank you very much
Please any one help me in solutions this problem One gram of zinc metal dissolved in a solution of hydrochloric acid with a concentration of 6 molars, dilute it to 250 ml. Take 25 ml of it into a polarography cell, and the polarogram shows a voltage wave at -0.65 volts (assigned to Cd impurities), a diffusion current equal to 32 milliamps. If we add to the cell containing the zinc solution 5 ml of Cadmium chloride concentration is 0.0005 molar, and when taking a second crystalogram, the diffusion current was 77.5 milliamps. Calculate the weight percentage of cadmium impurities in zinc metal.
Hello! Through what email should I contact you?
Thanks for this impressive explanation. You delved into some intricate details about all the parameters.
thanks bro. my teacher copyed you
we have your lessons here in my university
No worries; if you read the description, this is based on what my lecturer taught me! Hope it is useful for you
Excellent and very useful
did you swat a fly at 9:13???
Try doing these calculation potentials with the electrode metals that have been altered with what's described in this video ruclips.net/video/mQdoKaNI8Ko/видео.htmlsi=JUulVLleH_1wGfey didn't want to give away the keywords above watch the video and find out.🤯 FYI it's mind-blowing stuff and fun calculations to do I've done it.😂
@ 0:57 L = n . (1/2 . wl) and so wl = 2L / n. Knowing that k = 2pi / wl = 2pi / (2L / n) = n . pi / L
@ 1:33 "No PE"? I think the condition is that the PE = constant. Here (1:57) the PE is not zero (and it can still move in the x-directions)! And yes, PE = 0 = constant.
Fine presentation. Chapeau!
Thanks for the video! At 8:03, do you mean we get "a faster and faster deviation from *zero*" rather than "theory"? And I believe at 8:53, at high I, you intended to say that "*γ* becomes greater than 1" rather than log(γ) - am I correct?
Difficult to understand your speed is fast
great video! its very helpful to understand the concepts im currently studying
Thanks for making this video! This is very helpful
Incredible videos supplied for free, just started grad school and these videos are more helpful than classes or textbooks in getting caught up in the field
You're also great at posing and responding to all the rhetorical questions I'm thinking
Superb, Excellent videos, please keep up the good work by uploading such videos.
Thank you!!
Hello Dr... Can you write your e mail please... Thhank you
Please can you send your email address.
Very good and benefit me understanding exchange density
Thank you very much!
I'm from korea and I'm really appreciating your series, but i have one questions. you said that only neutral species are in subjected to diffusion, then aren't there any diffusion of ion? if there is concentration gradient of Cu2+, then there is no diffusion of Cu2+ but only migration occurs?
Yes; I can see that is confusing. Diffusion is driven solely by the concentration gradient. While a concentration gradient of ions can (and indeed does) exist, ionic migration moderated by an electric field far outweighs this; an imposed electric field causes ionic migration (cations to cathode, anions to anode) and in fact *creates* a concentration gradient of ions; any diffusion process is therefore eliminated. Remember that the the ions themselves create an electric field which, in the absence of the imposed field, will cause migration of the ions. Hope that clears things up - Glad you're finding the videos useful.
@@aw_mckinley Your explanation really touched me. I cannot be more grateful than this Thank you very very much.
@@aw_mckinley I had the same doubt and your explaination here that the migration outweighs diffusion is helpful. I am reading literature related to DFN model of lithium ion battery, which has partial derivatives with linking diffusion and migration(not surely if its exactly like that I am still trying to understand), so my question is the movemnet of lithium ion with its solvation shell will be considered as diffusion or migration? Does lithium ion with its solvation shell carry any charge or not?
13:12 i like how he says potential source of confusion and its about electric potential lol
So helpful - I’m doing degree level chemistry and this is AMAZING. Thank you!
Am doing Fuel Cell research paper, as an Engineering Major , the part about Exchange current density and Charge transfer is most confusing. Most of research paper just focus on other operating conditions and how they affects performance but very few mention CTC I have watched this video every time I read something confusing and this video help me understand the chemistry side. Thank you.
Hi Andrew, thank you for this series. It has provided me with better understanding in electrochemistry. I have a doubt on a statement you made in the 3:00-3:15 of the 10 session where you said that the concentration of a specie in the system can influence the rate of reaction. I argue that this may not necessarily be the case giving that the concentration has no role to play on the Gibbs free energy, exchange current density and standard potential. Could you please shed more light please.
THank you sir
6:34 the equation is wrong
5:10 I dont think the rate increases when the area of electrode becomes larger. Reaction rate is independant to the area.
Thank you for this amazing lecture
Nice video for a high-level introduction - but since this is called "7", would there be 6 videos before this? They do not seem to be around or were they just not recorded/uploaded?
Very nice video. Thanks for the upload. I just had a concern about the use of the mass transport limitation of the oxidized species as the main reason for the formation of a peak. I think CV peaks are more traditionally taught with the reactants being the mass limited species. While ofc both can be true depending on the their diffusion coefficients and charge, I think the explanation of the CV peak using a reactant mass transport limitation is better. This is because it is easier to transfer conceptually to different electrochemical processes such as CV for electroplating processes. What are your thoughts on this?
Amazing Video!
Very clear and helpful! Thanks a lot
so beautifully explained, thankss
I don't understand how your reagent is reduced from cation to neutral but then oxidized from anion to cation. Also the part at 9.23 I am not sure if is worded right? That said thank you for your insight, this is excellent
Glad you have found the videos useful. In the video we first look at the cathode process (reduction of cations to uncharged species) in the example of linear voltammetry; but in the second part when exploring cyclic voltammetry in depth we look at the anode process (oxidation of anions to uncharged species). Note that in both cases they are either oxidised or reduced to the uncharged species - I can't see anywhere that I reference oxidation from the anion direct to cation; this would involve a two-electron process and the kinetics would be _very_ different. Remember that we are only interested in processes happening at one electrode (while a counter electrode completes the circuit); at one potential we will be oxidising anions, and when we lower the potential we will start reducing cations. These are not necessarily positive or negative potentials, simply different levels of potential. We could plan to do our CV sweep between 0.2 V and 1.4V; never going into a negative potential region, but we may still get reduction happening. What we see very much depends on our experimental set up and the system we are interested in. RE 09:23 I'm not sure what you are getting from the video, so not sure where the confusion comes from. The background to the processes is that the negatively charged anion migrates across the electric field gradient to the anode, where it is oxidised to an uncharged species. This then diffuses across the concentration gradient away from the anode. So at point E, the concentration gradient causes diffusion to be faster than the electric field causes for migration of the anions. I realise this is just a re-wording of what I say in the video, so if this doesn't help to clear things up please do let me know.
@@aw_mckinley hey, thank you for the reply. It turns out you are completely right, I assumed the oxidation and reduction examples were for the same compound. At the point E as far as I understand we get a reverse current due to a reduction process and the oxidation has already stopped. I think I assumed the oxidized species are nil at bulk solution so I imagined the diffusion backwards.
Tomorrow I have my project work presentation, and i have to describe cyclovoltametry their....... I saw various video on topic.. But i can say this is the nicest explanation in compact way , I have ever seen.... Thank you so much sir Huge respect for you - from India🇮🇳
Can I get the pdf of your slides, Please I need them
Please share the ppt sir
Please share the ppt share
Please share the ppt sir
Please share the ppt sir
Sir can you please share the ppt of this video