Thank you so much Professor Dave. The most unique thing about your lessons is...there is always a comprehension check test at the end of it. It makes a significant difference because most of the time, I have been watching all online lessons and I thought I understood, but when it comes to problems, I dont know how to use the theory I learnt. But now, with your videos, I can learn what kind of problems will come up for the theory I learnt which is very helpful. Thanks again.
i dont mean to be offtopic but does someone know a tool to get back into an Instagram account?? I stupidly lost the login password. I would appreciate any tips you can give me.
Visit Unacademy JEE TH-cam channel and watch India's highly experienced and qualified teachers educate students FREE OF COST to crack entrance exams and they also provide pdf of notes
@@AvnishKumar-gy5nh of course brother but in only in hindi it is like the qualified teachers are always belongs to the people who speak hindi Wright isn't brother??
I love that you are able to present concepts in a way that makes sense. A lot of professors jump into certain topics without really letting us know the importance of it, what its used for in or why we should care. You have an amazing gift of giving students the AHA moment and making things click! Thank you doesn't suffice for the work you do. Much love 🤗
Prof.Dave, You explain everything so well. Guys, everyone watch the ad completely without skipping. This way, the prof gets some money. Thanks a million!
Hey Professor Christ. Suppose If I take the equation of PCl5 PCl3 and Cl2 at 1:44 . Now, since Kc(equilibrium constant) is independent of initial concentration, I can take Z molar solution and should still get the same answer. But if initial concentration is Z and degree of dissociation is a , Kc comes out to be (Za)^2/(Z-Za) => Za^2/(1-a). That is, it depends on Z(initial concentration) . PLEASE HELP.
in 2:52 why did he only take away one (0.135) form the 1m instead of two? shouldn't the product be 0.730 as both reactants have 0.135. someone please explain
Bruuhh im on a professor dave marathon since online classes got me confused as heck and now i have a test and i barely know what a chemical formula is xD
Hey, great tutorial! It really helped me to understand species concentrations better than my textbook. Just a small point though...at around 3:32, you mentioned that for Kc >> 1, "...we are creating more products..." which is not *technically* correct. The forward reaction is favored (when Kc >> 1), but at equilibrium, reactant and product concentrations are approximately constant. Making more products only occurs when the system is not in equilibrium, for Kc >> 1 and as you mentioned, when Kc > Q. It's a small point, but the semantic distinction is quite significant for a student to grasp chemical equilibrium. I know that you understand this distinction, but thought I would mention it here so other people don't leave with the idea of more products being *created* when Kc >> 1. I've subscribed and will be checking out your other videos. Your explanations are so clear and easy to follow. Thanks! :)
proffesor Dave you really exactly teacher who should all students rely on your lessons shorts and clear and convincing. i really appreciate you professor , but only few topics i didn't get on your lessons. that's Nervous system. CNS and PNS
Hi professor Dave. Thanks again for the great videos. Quick question on the checking comprehension. Did you multiply both sides by negative one to get to the quadratic form? When I multiply both sides by the denominator, I get the opposites for addition and subtraction.
nope i just brought the left side to the right side! if you have 0.036 - 0.36x and you bring it to the other side to be with 4x^2, you have to subtract the number and add the x term so the signs reverse.
question Equilibrium does mean the rate of the forward reaction is equal to the rate of the reverse reaction Equilibrium constant = forward reaction / backward reaction If equal, it means one Why does the reaction reach the equilibrium state? The equilibrium constant is not one?
Thank you very much this is extremely helpful. However, I am confused about how you got 4x^2 in the numerator when solving for X using the Equilibrium Constant Expression. Could you explain why we use 4x^2 instead of 2x^2? Thanks again!
@@ProfessorDaveExplains Yeah i was super confused as to why the 2 remained AS WELL as having it raised to a power of 2. I thought the coefficient was what became the power.
I LUV YOU SOO MUCH!!!!! thank you thank you thank you!!!!! nobody told me anything about the ICE thing i had to assume everything myself...but thanks to this, im confident to answer these types of questions!!! THANK YOU THANKYOU THANKYOUU
Every teacher is great but the way they introduce it is different. So the way you said was smooth to grasp, thank you professor. (Checking the comments, found so many Indian brothers and sisters ...They are always interestedin learning 😊😊)
Highly doubt I’d get a response but I’m gonna try (note that I learn chemistry in another language so some things might not make sense) I’m trying to understand why does a temperature disruption will change k and other disturbances won’t. I understand that one side of the reaction is prioritized in order to nullify the change made, but why does a temperature change also change the k? Does that have something to do with the fact that energy is used/ not prioritized in order to nullify the temperature change (sorry if this didn’t make sense)
if qc is higher than kc, the reaction proceeds in the reverse direction to achieve chemical equilibrium. So am i right to say that at the start of the reaction, the initial concentration of product is high while the reactant is 0?
well you could start the reaction from anywhere, all products, all reactants, some combination, and it will go in one direction or the other until it equilibrates
@@ProfessorDaveExplains I am not sure I understand either, it seemed as though it went straight from 0.126 to just knowing what x was? I feel like I missed something
In 2:06, what do you mean by “In this case, all stoichiometric coefficients are one”? Can you explain that in layman’s term? :( And what are stoichiometric coefficients? :((( Sorry for the dumb questions.
check out my tutorials on stoichiometry, the mole, balancing equations, etc. from earlier in the general chemistry series! they are necessary for understanding these concepts.
These steps aren't shown in the video's solution, but remember that everything inside the brackets/parentheses raised to the power of 2 is squared: [NO2] = 2x [NO2]² = [2x]² [2x]² = 4x²
Hi Professor Dave, for the answer 0.12, I know in the table it's 2x so 2 * 0.06 would be 0.12, but the question asks for NO2 while in the table is the concentration for 2NO2 so shouldn't that be divided by 2 again and get 0.6 (NO2) as the final answer? Sorry for my bad english
Sir plz can you in another video of yours.."The addition of inert gas at equilibrium at : (a) Constant pressure (b) Constant volume...... I would be really thankful if you could help.😃
Thank you so much!!! My chemistry "professor" was literally gaslighting us wtf, he taught us the entire process wrong and then told us the answer keys are given wrong in our book. 🤢🤢 Can't believe such people exist in this world Anyway, thanks again professor dave!
Thank you so much Professor Dave. The most unique thing about your lessons is...there is always a comprehension check test at the end of it. It makes a significant difference because most of the time, I have been watching all online lessons and I thought I understood, but when it comes to problems, I dont know how to use the theory I learnt. But now, with your videos, I can learn what kind of problems will come up for the theory I learnt which is very helpful. Thanks again.
happy to help!
Thank you professor Dave for a very clear explanations about Thermodynamics and Chemical Equilibrium. I really appreciate it.
i dont mean to be offtopic but does someone know a tool to get back into an Instagram account??
I stupidly lost the login password. I would appreciate any tips you can give me.
@@andredemetrius6083 bruh
@@andredemetrius6083 LOL
I’ve learned here in 6 minutes what I’ve been confused about for the past week. Thank you!
Damn
It's always crazy to see just how quickly and thoroughly you can teach a whole concept in under 10 minutes. Amazing work
This guy is awesome and sits among very few in the league of educating / Tutoring TH-camrs.
Visit Unacademy JEE TH-cam channel and watch India's highly experienced and qualified teachers educate students FREE OF COST to crack entrance exams and they also provide pdf of notes
@@AvnishKumar-gy5nh of course brother but in only in hindi it is like the qualified teachers are always belongs to the people who speak hindi Wright isn't brother??
@@skcenior4227 yes bro
@@AvnishKumar-gy5nh why are you boasting haha
I love that you are able to present concepts in a way that makes sense. A lot of professors jump into certain topics without really letting us know the importance of it, what its used for in or why we should care. You have an amazing gift of giving students the AHA moment and making things click! Thank you doesn't suffice for the work you do. Much love 🤗
The intro song aint lying
he really knows a lot of stuff
And explains it beautifully
Anyone in 2024?
✋✋✋he has just nailed it
sup
Here
yup
Here I am
Prof.Dave, You explain everything so well. Guys, everyone watch the ad completely without skipping. This way, the prof gets some money. Thanks a million!
Profesor Dave, your on line classes are helpful even to some teachers and professors. Your explanation is absolutely understandable. Thanks
Wish it was a step by step process on how you solved for x in the last example.
It's in there, look at the previous example for help. Remember products over reactants
U really explained very well.... 🇮🇳loads of love frm India
same
Grazie.
Got a exam in 30 mins! Let’s hope Dave can save me from failing!
@Mari Christofidou i passes with a decent grade!
Wish me luck, I'll be doing tha same :')
Thank you for teaching me jesus
Literally saving my life! Thanks so much
god bless this man
you make chem endurable :,)
I'm from Sri Lanka.... The way you teach is really amazing..... Really it covers our A/L syllabus.thank you so much
Thanks a million you are are lifting me up with your tutorials.
Andrew from Nigeria
I have a test in a few days and you're saving my life dude
Hey Professor Christ. Suppose If I take the equation of PCl5 PCl3 and Cl2 at 1:44 . Now, since Kc(equilibrium constant) is independent of initial concentration, I can take Z molar solution and should still get the same answer. But if initial concentration is Z and degree of dissociation is a , Kc comes out to be (Za)^2/(Z-Za) => Za^2/(1-a). That is, it depends on Z(initial concentration) . PLEASE HELP.
I swear my chem professor is the worst at teaching
blueberry yup and so as mine ... she’s the reason why i lost my key to future tho 💔
No , mine is worse 🙂💔
My chemistry teacher doesn't even teach us...
My science teacher too..
My chem teacher is completely under qualified.
I tell everyone about your channel, god bless you
Thanks!
A hundred page unit summarized in one 7min video ur the best
Wow this is very helpful. I've been staring at my Icebox Questions for hours. Thanks Dave💪🏽
in 2:52 why did he only take away one (0.135) form the 1m instead of two? shouldn't the product be 0.730 as both reactants have 0.135. someone please explain
I've never had an online tutor that has been the pillar of my chemistry marks. LMAO
Thanks a lot sir..I finally found a best destination 🎉
Congratulations for 1 millions hope to see u at 10 millions
Bruuhh im on a professor dave marathon since online classes got me confused as heck and now i have a test and i barely know what a chemical formula is xD
i thought this new semester was going to be a headache now im good thanks dude
You can learn as much about chemistry from this man's youtube channel as you can at a four year university.
I would love to learn more about balance being stillness please!
content so good my chem 2 prof sends your videos to watch instead of him lecturing
May I know how you solve 0.126=x/0.10-2x? If possible, please show me step by step. Thank you Dave.
just cross multiply, the rest is just algebra manipulation
Thank you so much for explaining this concept. You are superb and amazing
Prof Dave is the best.
Absolutely.
Ya made this one go easy too....Lucky to have prof like ya 😊😇
Hello, On the checking comprehension why is [NO2]^2 changed to 4x^2 and not 2x^2? Is it because of the equation give?
don't forget that when you do (2x)^2 the exponent operates on both the 2 and the x! so it becomes (2^2)(x^2) or 4x^2
Professor Dave Explains Thank you. Your videos are great!
PROFESSOR DAVE YOU. ARE. THE. BEST
i've been confused about this lesson for months now THANK YOU
we seriously need this type of teachers in india
sir please come in INDIA
i really appreciate it
even the lower order students would top by hearing his lectures so innovative hats off!!!
not me :/
this guy is the best. why cant my teacher be like him i swear i'd never have to crack my brains with him around
Your way of teaching is awesome 👌 sir. I like it. I am from India.
Even the first sentence of this video made so much more sense that what my teacher has taught
this dude is a teacher, we call these guys wizards cuz they are beasts.
This is fifteen times more useful than anything my teacher taught me, lol
WOW SIR.... GREAT SIMPLE EXPLANATION. THANK YOU
Hey, great tutorial! It really helped me to understand species concentrations better than my textbook.
Just a small point though...at around 3:32, you mentioned that for Kc >> 1, "...we are creating more products..." which is not *technically* correct. The forward reaction is favored (when Kc >> 1), but at equilibrium, reactant and product concentrations are approximately constant. Making more products only occurs when the system is not in equilibrium, for Kc >> 1 and as you mentioned, when Kc > Q. It's a small point, but the semantic distinction is quite significant for a student to grasp chemical equilibrium.
I know that you understand this distinction, but thought I would mention it here so other people don't leave with the idea of more products being *created* when Kc >> 1.
I've subscribed and will be checking out your other videos. Your explanations are so clear and easy to follow. Thanks! :)
proffesor Dave you really exactly teacher who should all students rely on your lessons shorts and clear and convincing. i really appreciate you professor , but only few topics i didn't get on your lessons. that's Nervous system. CNS and PNS
Hi professor Dave. Thanks again for the great videos. Quick question on the checking comprehension. Did you multiply both sides by negative one to get to the quadratic form? When I multiply both sides by the denominator, I get the opposites for addition and subtraction.
nope i just brought the left side to the right side! if you have 0.036 - 0.36x and you bring it to the other side to be with 4x^2, you have to subtract the number and add the x term so the signs reverse.
wow lol that was silly of me. Thanks for taking the time to answer such a mundane question! You are awesome!
@@ProfessorDaveExplains this was also helpful to me, thank you
the best presentation that i have ever seen
Professor
Why we raise the concentration with the power of their stoichiometric coefficients??
The life saver of students, thank you!
question
Equilibrium does mean the rate of the forward reaction is equal to the rate of the reverse reaction
Equilibrium constant = forward reaction / backward reaction
If equal, it means one
Why does the reaction reach the equilibrium state? The equilibrium constant is not one?
Thank you very much this is extremely helpful. However, I am confused about how you got 4x^2 in the numerator when solving for X using the Equilibrium Constant Expression. Could you explain why we use 4x^2 instead of 2x^2? Thanks again!
you have to square the 2 as well!
@@ProfessorDaveExplains Yeah i was super confused as to why the 2 remained AS WELL as having it raised to a power of 2. I thought the coefficient was what became the power.
My chemistry teacher sucks, and I'm so glad I found your youtube channel
I LUV YOU SOO MUCH!!!!! thank you thank you thank you!!!!! nobody told me anything about the ICE thing i had to assume everything myself...but thanks to this, im confident to answer these types of questions!!! THANK YOU THANKYOU THANKYOUU
Thank you sooooooo much Professor Dave, you are a real life saver, Love from India::::))))
Bro where are you from
Thank you so much Professor Dave, I finally understood how to find an equilibrium concentration
Covered most of the things of the topic in short time. This is good one.
he knows lot about science stuff
professor dave explains!!
Thank You so much for explaining this concept so easily and mess free.
Thank you. Si. It really helps me to my perfomance task in General Chemistry.
Can I ask something? What if the K is greater than 1 but the product is a solid. Is it still product favored?
Every teacher is great but the way they introduce it is different. So the way you said was smooth to grasp, thank you professor.
(Checking the comments, found so many Indian brothers and sisters ...They are always interestedin learning 😊😊)
I honestly love you! Thank you so Much! Many thanks 🤗🤗🤗🤗🤗.
Professor always make us come
closer to this subjects thanks.
6:07 Why is that 4X^2 and not 2X^2 ? We get two NO2 per one N2O4 right?
(2x)^2 = 4x^2, you have to square everything in the term.
@@ProfessorDaveExplains Thanks for the quick response. Also, you're a really good teacher.
2:55 "Simple no?
...no
Highly doubt I’d get a response but I’m gonna try (note that I learn chemistry in another language so some things might not make sense)
I’m trying to understand why does a temperature disruption will change k and other disturbances won’t. I understand that one side of the reaction is prioritized in order to nullify the change made, but why does a temperature change also change the k? Does that have something to do with the fact that energy is used/ not prioritized in order to nullify the temperature change (sorry if this didn’t make sense)
PROF DAVE I LOVE YOU THANK YOU SO MUCH
A bundle of thanks Mr.Dave
He knows a lot about science stuff.. thnx !
if qc is higher than kc, the reaction proceeds in the reverse direction to achieve chemical equilibrium. So am i right to say that at the start of the reaction, the initial concentration of product is high while the reactant is 0?
well you could start the reaction from anywhere, all products, all reactants, some combination, and it will go in one direction or the other until it equilibrates
@@ProfessorDaveExplains oh alright thank you
Thanks professor Dave,you really know how to explain....Zambia
شكرا بروفيسور💗💗💗
thaks professor dave. u really are amazing. you make it easier to understand chemistry.
Can somebody explain to me how did he got X at 5:45?
the math is laid out step by step, was there one step in particular that is confusing?
@@ProfessorDaveExplains I am not sure I understand either, it seemed as though it went straight from 0.126 to just knowing what x was? I feel like I missed something
How do you find 0.135 moles for x?
In 2:06, what do you mean by “In this case, all stoichiometric coefficients are one”? Can you explain that in layman’s term? :( And what are stoichiometric coefficients? :((( Sorry for the dumb questions.
check out my tutorials on stoichiometry, the mole, balancing equations, etc. from earlier in the general chemistry series! they are necessary for understanding these concepts.
Very simple and so helpful thank you dear dr
Actually thought I knew what I was doing until I watched this, now I'm completely lost haha
Are u sure about your thought 🤣🤣
i have a question about the example, how did you professor Dave get 0.036 from? And why is it 4x^2?
(2x)^2 = 4x^2, and the rest is just from doing some algebra. check out my algebra tutorials if its confusing!
Wow...it s all coming back to me!
Hi, do someone know why in the formula "C" is raised to "c", "D" to "d" and so on? and why C is multiplied by D and A by B, before division.
Great explanation ❤
question. why did you take the positive root instead of the negative one?
where did you get the value .135 from @2:45?
given information
why is it 4x squared and not 2x squared, in the comprehension check?
These steps aren't shown in the video's solution, but remember that everything inside the brackets/parentheses raised to the power of 2 is squared:
[NO2] = 2x
[NO2]² = [2x]²
[2x]² = 4x²
@@StephenJM94 thank you
Hi Professor Dave, for the answer 0.12, I know in the table it's 2x so 2 * 0.06 would be 0.12, but the question asks for NO2 while in the table is the concentration for 2NO2 so shouldn't that be divided by 2 again and get 0.6 (NO2) as the final answer? Sorry for my bad english
No , if 1 mole of n2o4 gives 2 mole of no2 so in total moles of no2 will be 2 moles not 1 mole
@@reddragonemperor1623 Bruv Im getting the same anwser but my X is 0.949 Isthere a problem. pls help
thanks a lot from my heart
You crazy man you saved my life
Why is x=0.06 @6:08? Isn't it supposed to be x=-0.0378?
solve the quadratic and take the positive value
@@ProfessorDaveExplains Even if the calculated x value is negative, just change it to positive?
no for any quadratic there will be two solutions, but we take the positive one because a negative concentration doesn't make any logical sense.
Sir plz can you in another video of yours.."The addition of inert gas at equilibrium at : (a) Constant pressure (b) Constant volume......
I would be really thankful if you could help.😃
Thanks Professor Dave.....
Howd you solve for X?
Thank you so much for explaining so well!
I love your explanations ! wish you all the best.......
Thank you so much!!! My chemistry "professor" was literally gaslighting us wtf, he taught us the entire process wrong and then told us the answer keys are given wrong in our book. 🤢🤢 Can't believe such people exist in this world
Anyway, thanks again professor dave!