I think that, for the sake of exams, Kw will always be 1x10^-14 unless stated otherwise :) You've probably worked this out already but I thought I'd comment just incase there are other people confused!
Hi!, How does temperature effect the position of equilibrium of kw? Is it in warmer temperatures that water is more 'acidic' ? The video is fantastic by the way! thank you!
I love your videos! First your such a great teacher and second, your personality makes them so funny at the same time with all the noises and stuff that you make😂!! Thank you so much
Yay! Thanks so much for uploading these they are always sososo helpful. Do you think you could maybe please do a short summary of acid/base reactions, that is to say, for example, why CH3COOH + F- --> CH3COO- + HF, because i thought that the acid (ethanoic acid) and base (F-) would neutralise to form water but it doesn't. Also when do you use normal arrows and when do you use equilibrium arrows? Thank you!! :)
+india Where did you get that equation from? I'd like to see it in context really... Normal arrows are used for strong acids/bases and the equilibrium arrows are used for weak acids/bases. I'll be doing a video on weak acids/bases soon!
+E Rintoul The equation is from one of the old European Bac examinations (however I find AQA syllabus useful for it) and it basically just asks to complete the equation (equilibrium) of CH3COOH + F- ? my final issue is, how do you know which side the equilibrium lies on or does that go under the video on weak acids/bases? :) thanks!
india Could you send me the link for the paper? I'm interested in knowing exactly what it says. When it comes to weak acids, the equilibrium lies far to the left and that leads to less dissociation and as such, leads to them being weaker acids!
I toyed with starting a patreon, but didn't like the idea of people paying into something to receive content (I think that's how patreon works...). I do have a PayPal donate link in the about section which you are more than welcome to use! But honestly, you really don't have to!
Hello! Loved the video...really helped, but I’m a little confused. At 7:04 , how did you get a pH of 6.14? I tried it and I got something much different. Method: Kw= 51.3x10^-14 Kw= [H+][OH-] Kw= 2[H+] [H+]= (51.3x10^-14)/2 [H+]= 2.565x10^-13 pH=-log[H+] pH=-log[2.565x10^-13] pH= 12.59?????? Please help. Thanks
hi sir, your videos are very helpful keep up the great work. I'm doing the OCR board, are these videos still relivent ? would you consider making OCR videos ? thanks for your help !
+Obaid Zadran To be honest, I have too much on to make OCR videos as well. But, you should find that these are very similar to what is required from OCR...
Legend has it he’s still looking for the perfect salmon colour
lmao
😂😂😂😂
😂
six years later and you are still a blessing to hundreds of students, we really do appreciate your effort!! : )
"that's a lovely colour isn't it... like skin!" love this
8:43 is the time stamp hahaha
"that's a lovely colour isn't it" hahahaha
8 years later.. still helping us out what a G
“Possibly dribbling out your eyes” omg made my day
That salmon colour though 😉
god bless your soul. You are so genuine and very kind. You deserve more subs dude
Thank you! Youve helped me at AS, and with the new content continue to help me at A2 :).
+Raz Raz I'm happy to have helped!
Is there a video on Ka and working out weak acids and bases?
Yep
top lad rintoul
I am SOOOOO happy you have uploaded videos on this topic, thank you so so much!
+innocent azure No worries :)
salmon sure is great haha
+Nishi Solanki I don't remember saying anything about salmon!? I don't really like salmon.
😂 the salmon hahaha, honestly made me laugh so much through the stress of paper 1 tomorrow
Thanks for the new A2 vids, much appreciated
+Boby Gandhi No worries. There will be more.
could you please make a video that covers optical isomerism?
“Mathsed it up”
7:37 best part
you're an absolute ledge
Is there a video on Ka?
On the calculations at around 11:50 how were you getting the values for KW or were you just not showing them to us?
yeah i didn't get all of the last examples
I think that, for the sake of exams, Kw will always be 1x10^-14 unless stated otherwise :) You've probably worked this out already but I thought I'd comment just incase there are other people confused!
After you calculate [H^+] using Kw equation, you utilise -log[H^+] to calculate the ph.
Yo we have the same name
Hi!,
How does temperature effect the position of equilibrium of kw? Is it in warmer temperatures that water is more 'acidic' ?
The video is fantastic by the way! thank you!
+NiksDjs As temperature increases, the value of Kw also increases. Because of the logarithmic nature of the pH scale, this gives a lower pH.
This is amazing! Will you upload a video on indicators ?
Thank you, this was very helpful. I especially love how you spent so much time tryna find the salmon colour LMAO
Eliot you are a hero among men
Thank You so much. Your videos are amazing! Can you do a quick video on pH curves please?
+Reian Taank I shall at some point. Watch this space!
super happy to see these videos up :) really helping me in my A2, thanks :)
+adventurebecks There will be more! And no worries :)
8:43 elliot embraces his artist side
Just when I needed this! thankssss
+heylookitstan Good timing!
I’m confused at 11:00
I put the equation into my calculator and got 3.7 not 13.70.
I did:
1x10^-4 / 0.500 = 2x10^-4
pH= -log ( 2x10^-4 ) = 3.7
HELP!!
Freya Tc it should be 1x10^-14
Not 1x10^-4
That is a lovely colour! :)
I love your videos! First your such a great teacher and second, your personality makes them so funny at the same time with all the noises and stuff that you make😂!! Thank you so much
THANK YOU SOOOO MUCHHH
How did you get the answer of 14.79 at 11:59?
Could you please make a video on weak acids and bases, and Ka?
Yay! Thanks so much for uploading these they are always sososo helpful. Do you think you could maybe please do a short summary of acid/base reactions, that is to say, for example, why CH3COOH + F- --> CH3COO- + HF, because i thought that the acid (ethanoic acid) and base (F-) would neutralise to form water but it doesn't. Also when do you use normal arrows and when do you use equilibrium arrows? Thank you!! :)
+india Where did you get that equation from? I'd like to see it in context really... Normal arrows are used for strong acids/bases and the equilibrium arrows are used for weak acids/bases. I'll be doing a video on weak acids/bases soon!
+E Rintoul The equation is from one of the old European Bac examinations (however I find AQA syllabus useful for it) and it basically just asks to complete the equation (equilibrium) of CH3COOH + F- ? my final issue is, how do you know which side the equilibrium lies on or does that go under the video on weak acids/bases? :) thanks!
india Could you send me the link for the paper? I'm interested in knowing exactly what it says. When it comes to weak acids, the equilibrium lies far to the left and that leads to less dissociation and as such, leads to them being weaker acids!
E Rintoul Yes sure! Do you have a gmail account so I can share the document with you?? :) and thanks!
india For real. It's mrerintoulchemistry@gmail.com
Youre a genius. I love you
Please do a video on optical isomerism!!
Wait why can you use Kw for equations that aren't water?
So is water always always always neutral and everything else can be taken as relative to it?
Thank you very much, really appreciated!!
+Luke Alderson No problem at all :)
I know this is late but is there a way to support this channel, like a patreon maybe. It's an absolute lifesaver
I toyed with starting a patreon, but didn't like the idea of people paying into something to receive content (I think that's how patreon works...). I do have a PayPal donate link in the about section which you are more than welcome to use! But honestly, you really don't have to!
Hello! Loved the video...really helped, but I’m a little confused. At 7:04 , how did you get a pH of 6.14? I tried it and I got something much different.
Method:
Kw= 51.3x10^-14
Kw= [H+][OH-]
Kw= 2[H+]
[H+]= (51.3x10^-14)/2
[H+]= 2.565x10^-13
pH=-log[H+]
pH=-log[2.565x10^-13]
pH= 12.59??????
Please help. Thanks
Uzma N it’s not 2x[H+]
2 is in the power so it’s [H+]^2
wait, surely the equil would lie far to the right if most of the solution is in the form of H20?
how transferable are these videos with OCR? great videos very engaging
hi sir, your videos are very helpful keep up the great work.
I'm doing the OCR board, are these videos still relivent ?
would you consider making OCR videos ?
thanks for your help !
+Obaid Zadran To be honest, I have too much on to make OCR videos as well. But, you should find that these are very similar to what is required from OCR...
this guy's a god
Great video!! Does this mean you've covered the whole pH/buffers/acid/base topic?
+mali 45671 Not quite. I think weak acids is missing...
+E Rintoul Great videos!!! are you still making more for AQA A2 Chemistry (unit 4 and 5)
PLEASE DO A VIDEO ON ACID BASE TITRATION CURVES AND INDICATORS A LEVELS
This helped a lot, thank you.
you know this guy serious bout he's colours
"ooh im gonna go with it"uses it "ooh no noimnot"
great video! lol the salmon part got me
When are you supposed to know whether to use -log10[H+] or just -log[H+]
they give the same answer
@@otiliawalters8271 oh ok I see thanks
For your calculations of ph at 100 degrees celsius i got 7.162401832*10^-7
jonty clark no you didn't. I'm pretty sure that's the hydrogen ion concentration. Remember to do the - log
yer ok i see now was wrong. thank you.
Thanks so much, I'm currently learning this topic
+James Chikari Well I hope it all makes sense!
salmon id say more pink
im dying over the salmon
If Kw is for water, how come you used it for bases?
iPlay its the only way at this level you can work this out. in the same way Ka is for acids but you can use it for the salt in some scenarios
what a legend
salmon
7:37 this made me laugh even though im on a chemistry revision grind
who is watching this in 2020
when she wears them thicc jeans to college 08:18
LOOL
LOOOOOL DEAD.
"what colour is a salmon?" XD
are the units always mol^2dm^-6?
9:34 practically finished me off hahah
i want the colour of a salmon....... "what's the colour of a salmon?"
What the hell is Ka then? haha there's too many K's in chemistry!
Creased at salmon
Ka bish plz
😅😊
I am wasted :(