Great video! Just one thing, at roughly 9:30 when you found out the no. of moles of all the gases, I don’t understand how you go from 2 moles of PCl5 to 3.25 total moles. Where did the extra 1.25 moles come from. I know my understanding of what moles are is probably completely off, but I’m trying to self-teach in coronavirus lockdown, if someone could help it would really be appreciated! Thanks
Because the ratio of the moles after equilibrium is 1:1 for the products so, therefore, PCl3 and Cl2 are both equal to 1.25, (and PCl5 is 0.75 because 2 - 1.25 = 0.75) after equilibrium. Adding 1.25 +1.25 + 0.75 = 3.25. So using this we can find out the mole fraction. Hope this helped! :)
I’m sure that changing pressure affects the value of Kp, if you do your calculation at the end again with a different pressure then the value for Kp changes.
@@georgewisa6769 having not touched a chemistry textbook for 3 years, at this point i don't even understand my question anymore lool.😂😂 but I appreciate the response
I'm just a little bit confused. In which spec is this video for? I've looked at the spec and I can't seem to find anything on Kp. As in, is this video for those who will be sitting both AS and A2 exams at the end of the A level course like me to know about?
Sana It's for the NEW linear spec, if your AS paper (if you even did it) does not count then this is the correct specification for you. 3.1.10 in the AQA spec if you wanna check it out
I love you ... go to heaven please Also why did u divide the no. of moles of N and O I mean shouldnt we add them to find the M.F bcz u said no.of moles of gas / TOTAL no . of moles of gases?
He added the no. of moles of O2 (0.075625 mol) and the no. of moles of N2 (0.2864 mol) to get 0.362025 mol. He then divided the no. of moles of the gas he was dealing with (O2, 0.075625 mol) by the TOTAL no. of moles he just calculated (0.362025 mol). moles of gas / total moles of gases = moles of O2 / moles of N2 + moles of O2 = 0.075625 / 0.2864 + 0.075625 = 0.075625 / 0.362025 = 0.2088..... You probably already figured this out already but if you didn't, hope that answered your question.
Timestamps:
0:46 - The Kp Equation
3:11 - Simple Kp calculation example
6:44 - The Mole Fraction
9:46 - Calculating partial pressure from mole fraction
14:52 - Effect of changing conditions of Kp
16:16 - Exam Question walkthrough
Thank you !!!!!!
I realize I'm kinda randomly asking but do anybody know a good place to watch new series online?
@Nathan Oakley I would suggest flixzone. Just search on google for it =)
@Colson Marcos yea, been using FlixZone for months myself =)
@Colson Marcos Thank you, signed up and it seems to work :) I really appreciate it!
I love how relatable he is. WE ALL celebrate like that when we get the right answers
for those last minute crammers like me (hehehe), speed up the videos so u can watch them all!!!!!!!
best advice!
watching this in 2018, a day till my paper 1 exam and your'e an absoulte life saver
Same, my exam is after tomorrow
Marya Amin Same, 3.5 hours to go till exam
lmao how did you guys do in your exam?
"sealed....veshel vessel veshel vessel"
AMAZING EXPLANATION! THANKS MAN!
16:30 when your teacher asks you "do you get it now?"
you're back!!!!!!!! perfect timing for my christmas holiday revison!
When you add up all the "MOLE FRACTIONS" does it always equal to 1? Anyone? Thanks
yup.
Thanks for replying bob
Literally the best explanation of this topic! I am lucky to find you on youtube!
I fucking love you, my teacher is so bad but I just watch your video and understand it
Youre a miracle, i would watch your vidoes if they were 2 hours long
wow christmas came early
that fact that a thirty minute video on chemistry and calculations is somewhat of a christmas present just shows how peak a-levels are
init bruv it's actually that bad smh
I’ve just started teaching and this is how I’m going to teach tomorrow.
Just show ur class the video then play kahoot the rest of the lesson
@@amanb5727 lol
@@kayceelondon UPDATE: I got a D in A level chemistry 🤣🤣🤣 if they made us take the exam i could've got a C tho
@@amanb5727 ahahahaha😂 thanks for sharing that with us! It’s no big deal tho so don’t stress it!!! Hope you got more good things coming your way!
Great video! Just one thing, at roughly 9:30 when you found out the no. of moles of all the gases, I don’t understand how you go from 2 moles of PCl5 to 3.25 total moles. Where did the extra 1.25 moles come from. I know my understanding of what moles are is probably completely off, but I’m trying to self-teach in coronavirus lockdown, if someone could help it would really be appreciated! Thanks
Because the ratio of the moles after equilibrium is 1:1 for the products so, therefore, PCl3 and Cl2 are both equal to 1.25, (and PCl5 is 0.75 because 2 - 1.25 = 0.75) after equilibrium. Adding 1.25 +1.25 + 0.75 = 3.25. So using this we can find out the mole fraction. Hope this helped! :)
Best videos out here for a level chem, thank you, sir!
saar endyan
How happy does getting that last answer correct make you! Love you passion!
Love this guy!! Your videos are really helpful thank you so much fir uploading them 😍😍😍 i bet your students love you for the resources
All your videos save me
2021 lockdown studying anyone?
I’m sure that changing pressure affects the value of Kp, if you do your calculation at the end again with a different pressure then the value for Kp changes.
Yes, if there are different numbers of moles of gas on each side of the equation the position of equilibrium will shift.
Wow huge mistake guys, Kp only changees with temp change
I was laughing my ass off at the end 😂😂😂
Great video!
You make it so easy like no other😭🥺
it feels illegal to watch these for free
Absolute genius. Thanks I now understand.
Hi Sir what are the units for this kp question at 6:34 as there is a power of a half? Thanks :)
hey cold coffee u still need that answer? 3 years later 😂.
@@georgewisa6769 having not touched a chemistry textbook for 3 years, at this point i don't even understand my question anymore lool.😂😂 but I appreciate the response
@@coldcoffeeandcake-7511 How'd you get on with A-levels if u dont mind me asking
e rintoul back wid a bang , real g, can you make a vid on kinetics year 2 there has been a few changes in regard to the old spec
CFC 9 c
alie he's a madness of a ting, my g
Chelseaaaa🔵🔵🔵🔵🔵blue is the colour football is our game and.....
Simply amazing!
can you please do a video on AS level states of matter
What tablet and software do you use to make these videos?
At 21:58 how did you get 0.42 moles of 3H2(g)?
Np i got it
26:19 when you take A level maths
Hi, in kP, kA, kC and kW, and any other constants are they all only affected by temparature, or does it differ?
in terms of our exams anyway, yes temperature is the only thing that affects constants but im not sure if thats actually the case
PHENOMENAL 👌🏽👌🏽👌🏽
You help so much, thankyou for such great content!
Aren't we supposed to convert kPa to Pa?
Hey, if all the info is given in kPa. Why convert. You will get the same value.
If you mean at the end I don't think it matters
Yeah, aren't we?
im about 5 years late but thankyou!! :)
You've saved my life thank you
I couldn't decide whether I should round it to 2 or 3 sig. figures so they'de just take a mark away like that even if everything is correct?
You are incredible 😭😭
3fe+4h2O _____ fe2O4 +4h2, the equilibrium constant K of the reaction above is represented as
25:31 idk but that made my day lmao 💀
Yesssssssss you're the mannn
Wait is this AS level only or AS plus A level?
this is A2 (year 13 content)
Do you use Kpa or pa in Kp. My teacher told us to use pa and I did the specimen question I got it slightly wrong. My answer was 1.47*10^-5
I love you ❤︎
i love u too x
I'm just a little bit confused. In which spec is this video for? I've looked at the spec and I can't seem to find anything on Kp. As in, is this video for those who will be sitting both AS and A2 exams at the end of the A level course like me to know about?
Sana It's for the NEW linear spec, if your AS paper (if you even did it) does not count then this is the correct specification for you. 3.1.10 in the AQA spec if you wanna check it out
Thank you!
Loved this!
THANK U
I LOVE YOU AHHHHHHHH
Is Kp an A2 or As topic?
Rhys Nicholas it’s in the year 2 textbook for Edexcel
I love you ... go to heaven please
Also why did u divide the no. of moles of N and O I mean shouldnt we add them to find the M.F bcz u said no.of moles of gas / TOTAL no . of moles of gases?
He added the no. of moles of O2 (0.075625 mol) and the no. of moles of N2 (0.2864 mol) to get 0.362025 mol. He then divided the no. of moles of the gas he was dealing with (O2, 0.075625 mol) by the TOTAL no. of moles he just calculated (0.362025 mol).
moles of gas / total moles of gases
= moles of O2 / moles of N2 + moles of O2
= 0.075625 / 0.2864 + 0.075625
= 0.075625 / 0.362025
= 0.2088.....
You probably already figured this out already but if you didn't, hope that answered your question.
30:02 - you wouldn't have uploaded it if it was wrong Sir 😂
Is this for A2?
yup..
Depends on spec
Depends.
quite helpful, thank you! :)
Anymore today? Keep it up
Mathematicians...even the British ones: English isnt my FoRtE
can you please request me a physics channel....i mean just like yours?
lol you were ment to add the moles but u divided them
id this a level or as level
Pretty sure it's a level🤷🏾♀️
Thank you!
thanks so much so useful
Noice vid thanks
still don’t understand this😦
keep posting plz
12:13 LMAOOOO
wow
ur a mess lmao but also a legend, cheers
Thanks...?
can you please do a video on AS level states of matter
Thank you!!