Bill Stapleton

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@ChinmayiMangoli 17 күн бұрын

Thankyou very much, I finally understood this

@billstapleton2071 16 күн бұрын

So glad I could help! If you have your exam on Wednesday, best of luck! If not, best of luck with Chem anyway!!!

@kennyGB3926 2 ай бұрын

First video to do it . I feel a lot more assured there's a doable way to find out .Thank you.😊

@billstapleton2071 3 ай бұрын

Just to update to this video, we now refer to them as "Secondary Interactions", not secondary bonds. I know this is confusing, given we still call them hydrogen bonds, but where I refer to secondary bonds, please make sure you understand to use the term "interactions". Hope this helps!

@graceryan4152 6 ай бұрын

Thank you!

@gracechen2412 10 ай бұрын

thank you! finally this topic is demystified!

@surendersingal2192 Жыл бұрын

Thank you sir, great schooling on Zinc production process. Jussojuan

@thomaschirila6372 Жыл бұрын

What are the units for the 193,000 in the equation? Where did you get it from?

@billstapleton2071 Жыл бұрын

It comes from the constant that the charge on one mole of electrons is a faraday, or 96500 coulomb mol-1. Then given that the mole ratio of Cu to electrons is 1:2, given both the Faradays and mole ratio are on the bottom, you multiply 96500 x 2 to get 193 000. Its complicated, hence why I simplified it for Year 12 Chemistry.

@thomaschirila6372 Жыл бұрын

@@billstapleton2071 ok, you just didn’t put the units in the equation. Where I go to school, you can get almost and entire question wrong simply for not using units in the equation, and I can see why. Numbers are just numbers unless you specify what they are.

@billstapleton2071 Жыл бұрын

@@thomaschirila6372 sorry if I confused you! This video was only ever designed to be a support for my students with their practical task. The calculation is actually not part of our Year 12 Chemistry course, it is only used so we can get a theoretical mass calculation to compare against. FYI, you do not need to put units in most of the exam question answers, as they are stated in the question. Units shouldn't need to be included in equations, only for the final answers, but thats just my opinion! All the best with your study!

@Omixea Жыл бұрын

I love you bill

@Omixea Жыл бұрын

I love you bill

@Omixea Жыл бұрын

I love you bill

@Omixea Жыл бұрын

I love you bill

@Omixea Жыл бұрын

I love you bill

@Omixea Жыл бұрын

I love you bill

@Omixea Жыл бұрын

I love you bill

@Omixea Жыл бұрын

I love you bill

@Omixea Жыл бұрын

I love you bill

@billstapleton2071 Жыл бұрын

Lol thank you random stranger...always nice to be loved!

@elenanitot Жыл бұрын

Love it!

@trankamy8538 Жыл бұрын

useful

@1babyborn Жыл бұрын

is rinsing the burette systematic or random error?

@billstapleton2071 Жыл бұрын

Hi Naomi. If you don't rinse the burette, it will be a random error. It will affect your first one or two titrations, but once you have to refill the burette it will pretty much disappear and will no longer affect your results. Hope this helps!

@1babyborn Жыл бұрын

@@billstapleton2071 thank you

@reeseyvuitton4257 Жыл бұрын

Higher titre equals higher concentration value? Or lower concentration value? It's been changing in the video

@roobaa5594 Жыл бұрын

Thank you for giving the best explanations! Could you please add a link to your website to access the PowerPoint?

@billstapleton2071 Жыл бұрын

Hi Rooba, I no longer run that website, but I am more than happy to send them to you via DropBox. You should be able to access them here: www.dropbox.com/sh/30wb30wgpmquyju/AAAL_Y1gJ4tcGzqJ-nRokoJNa?dl=0 Please let me know if it doesn't work!

@roobaa5594 Жыл бұрын

@@billstapleton2071 Thank you so much!

@Nashan_Layan 2 жыл бұрын

🔥 😮

@abdulrk6284 2 жыл бұрын

thanks for this really informative

@billstapleton2071 2 жыл бұрын

Glad it was helpful!

@qaharjuwon2004 2 жыл бұрын

Thanks

@mayaperry1752 2 жыл бұрын

Thank you! I couldn't find anything that said octets expanded past 10 electrons and I was very confused

@billstapleton2071 2 жыл бұрын

Glad I could help!

@theaprimrose899 2 жыл бұрын

this was so helpful thank you !!

@billstapleton2071 2 жыл бұрын

You're so welcome!

@lauratew 2 жыл бұрын

Hello Bill! Just came across your nice vid here so I've subscribed. Laura from SVCC!

@billstapleton2071 2 жыл бұрын

Thanks! Great to hear from you! Hope you are doing well

@HALOO_ANTON 2 жыл бұрын

Thank you so much this is so easy to understand greetings from Indonesia !!

@billstapleton2071 2 жыл бұрын

You're very welcome!

@ela7511 2 жыл бұрын

Appreciate ya

@v1nce502 2 жыл бұрын

Thank you! UKChO 2020 Round One Question 4 is related to this.

@billstapleton2071 2 жыл бұрын

Welcome! Glad to hear that it helped

@Ravenjin00 3 жыл бұрын

thank you so much sir,you really help me

@vidusheeyvarshnay6535 3 жыл бұрын

What do you write with?

@billstapleton2071 3 жыл бұрын

They are glass markers on a glass screen. Can get them at most newsagents or office supply stores. Thanks for asking!

@akirauzumaki3805 3 жыл бұрын

Great explanation! Thank you very much for your efforts!

@namitaggarwal1899 3 жыл бұрын

Highly underrated

@billstapleton2071 3 жыл бұрын

Thanks! Appreciate the support

@devangib3968 3 жыл бұрын

Good explaination sir ty

@sairarahman6558 3 жыл бұрын

Super Amazing sir

@billstapleton2071 3 жыл бұрын

Thanks! Let me know if there is something else you want a video on

@khoacao4940 3 жыл бұрын

Why we need to burn the sample?

@JohnDoe-et4oq 3 жыл бұрын

Hey are you there ? I need your help

@billstapleton2071 3 жыл бұрын

Hi sorry didn’t see this, how can I help?

@ayaalammo3709 3 жыл бұрын

great video, thanks a lot.

@ntodrizzy6597 3 жыл бұрын

I didn’t understand the bit of not filling the below tap what do you mean. We should fill solution till below the tap.

@billstapleton2071 3 жыл бұрын

Hi Drizzy, if you do not fill below the tap then it is a random error as the titre value will appear higher than it should be. You are correct in that to perform a titration correctly, you must fill below the two before your first titration

@ntodrizzy6597 3 жыл бұрын

Thanks dude can you tell me few errors like systematic, human and random for a titration for KHP Vs NaOH please. Also how I could reduce them as well the errors.

@connor465 3 жыл бұрын

3:49 ahh so you moved your notes down by your feet, or low on the wall, instead of holding them looks much more professional, not waving a paper around the whole video

@connor465 3 жыл бұрын

for me, everything is the unknown 3:50

@Repsyzz 3 жыл бұрын

how do you write like that

@billstapleton2071 3 жыл бұрын

Lol, it’s actually just that I write normally and flip the video in editing, I am actually right handed.

@Repsyzz 3 жыл бұрын

@@billstapleton2071 oh i see, great video

@athenafaria6578 4 жыл бұрын

Very good video! Thank you very much!

@billstapleton2071 4 жыл бұрын

Glad it was useful! Thanks for the nice comments

@alicedeng8978 4 жыл бұрын

So helpful!😂

@billstapleton2071 4 жыл бұрын

Lol, you trolling me Alice? Thanks for the comment though! Hope you are well!

@alicedeng8978 4 жыл бұрын

@@billstapleton2071 I am very well, thank you for asking! Still suffering from chemistry in uni lol!

@pipb1426 4 жыл бұрын

Thanks so much for the video! I know this is very late but I have a question - what is the purpose of the flame? Why can't you simply spray the metal solution in the air? Wouldn't the energy from the flame interfere with the amount of energy absorbed? Thanks so much again!

@billstapleton2071 4 жыл бұрын

The purpose of the flame is to vapourise the sample. The flame evaporates off the solvent that the sample is in, and it doesn't interfere with the energy absorbed as it is not the specific wavelength of the atoms in the sample, so is not absorbed by the atoms. Hope this makes sense?

@pipb1426 4 жыл бұрын

@@billstapleton2071 Ok that makes sense! Thanks so much for the reply.

@IncognitoDiabetic 4 жыл бұрын

Why u got no clout bro I’m rooting for u my g keep up the fire content

@romandarko2415 4 жыл бұрын

Whilst I understand that some of the light of the correct wavelength is absorbed by the atoms in the flame and putting them in an excited state, but what's to stop the electrons in these excited states from dropping down to their ground state and emit light (photons) of the same wavelength ? In emission spectroscopy, the atoms are excited in a high temp plasma which initially push electrons to higher states and when they return to their ground states, they emit photons of specific wavelengths to give a line emission spectrum. Or have i misunderstood? Thanks

@robot5254 4 жыл бұрын

If I fail my chem practical I’m coming for u

@billstapleton2071 4 жыл бұрын

Max Ahmed how’d you go? Do I need to move? Hope the video helped!

@robot5254 4 жыл бұрын

Bill Stapleton helped me finally understand the difference between systematic and random error the practical exam went great

@szintiavarady7933 4 жыл бұрын

Okay

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