Hi, as a professor of general chemistry I have used your videos on atomic orbital hybridization and this one to help my students. Your 3D graphics are particularly helpful for these topics. Thanks for doing this!
Thank you for taking the time out and trying your best to help your students. Most teachers are not that humble so they won't look for other sources of information.
Wow, I reviewed this several times and in just a short while and understand so much. Our whole class is a bit confused because of our chemistry teacher, is doing a terrible job. He wings it in class, is disorganized and unprepared and explains thing in pieces and jumps around. Maybe Ph.D.'s should continue to refine their methods to be able to explain it to us, laypersons. It's so sad that a professor can make so much money and we pay so much tuition and get a better education from youtube for free. FANTASTIC JOB TO THE AUTHOR HE UNDERSTANDS HOW TO TEACH.
WTF!!! I'm gonna cry😭.. I almost give up because of too much confusion about this topic. But this video really really helped me erase my confusionssss. You're the best teacher!!
You have no idea how hard it was to find a video that actually explained this well. Yesterday I found a website that has very simple breakdowns of chemistry terms and now this! I'm on a roll! Thank you thank you thank you :D
Now I get it! This is probably about the 5th video i've seen on polarity and this one is the only one to has it make sense for me. Thank you Crash Chemistry Academy!
The positive comments for this video are well deserved. The COVID-19 shutdown happened just as we were beginning this topic with my high school chemistry class. I know this will help my students interested in continued learning, and in fact I am going back to make a few tweaks to my instruction based on your approach.
Thank you for the tutorial, now I can find and differentiate by myself whether the molecule is polar or non-polar. Once again thank you sir for the explanation.
This is so awesome. I understood from beginning to end, something sorely missing than the other vids I looked at. Very clear, and your illustrations really nailed it. Thank you!!!!!!!!!!!
I feel like it all makes sense, but there are too many rules and caveats for me to remember. I have to keep coming back to videos like this to make I know what I'm doing. Thank you, you have saved my grade.
Sometimes I doubt if I really have to go to school. UA-cam makes lessons easier, more than a two-hour classroom discussion. This one saved me for my Chem exams
Not really. The dot & dash structures do not show all the other electrons that exist below the outer shell, and do not show how many protons are in the atom. And that is not necessary because in a molecule, each atom contributes an equal amount of protons and electrons to the compound. So it is the electronegativity differences that are relied upon to indicate how uniformly those electrons are distributed. Any differences in electronegativity changes the electron density around one atom versus another, resulting in concentration of charge on one part of the molecule versus another part, and this is what we call polarity.
This was amazing! I absolutely loved the flowchart idea - it really helped me organize my notes & my thinking, and then teach the concepts to my (very bored) mother after I learned them properly! Thanks for being so organized & efficient in your teaching process, with a wealth of possible examples! Elle
Hi, I have a question. According to the video, we need to check if there is any polar bonds. For PH3, since they have the same electronegativity, they have no polar bonds at all then they are supposed to be non-polar. But in my test, I wrote non-polar and I got it wrong.
Not sure what level your chemistry class is. Phosphorus has a Pauling EN of 2.19, and hydrogen is 2.20. The difference seems negligible, so the polarity considerations would have to take into account the lone pairs on the phosphorus as well as formal charge, and of course the pyramidal shape. My video was aimed at an introductory level and so did not address those issues.
Your animations and explanations are excellent specially hybridization video. Thank you. The only point I would make in the polarity lesson is regarding ozone, which is polar. The definition of polarity is based on what you stated at the very beginning, which is asymmetrical distribution of electron density around the molecule. Because ozone has a lone pair and is bent, the electron density is not evenly distributed. It does not matter if O-O bond itself is non-polar. Dipoles will not cancel out.
4:52 I stopped comprehending ;-; I'm better with the EN difference but idk which is the one being subracted if the center one has less of an EN than the ones bonded to it. And at this point he stops mentioning it? Can any one help ;-;
thank you so much for your educational and effective videos! i understand everything you explain and i really appreciate your work. btw i'm switching from applied biology to chemistry this semester 🙏
Teacher, 10:16 You could to pair both trigonal planar and pyramidal, in the illustration next time. trigonal planar has no eletric negative charge. Bu pyramidal has uneven distribuion of electric negative charge. Right?
sir, your explanation is super clear to me. As u mentioned, CO2 is a nonpolar molecule since its polarity cancels out, but why does it absorb infrared and contribute to Green house effect , because as we kNow that only molecules that show polarity absorb infrared
I'm not sure there is a link between polarity and specific EM frequency absorbed. The two worst greenhouses gases (IR absorbing), methane and CO2, are completely non-polar. Water is very good at absorbing IR and is polar but the amount of water vapor that can be held in the atmosphere is limited to a maximum vapor pressure, which of course increases with temperature. The mechanism of IR absorption is the matching of IR frequency of EM oscillation with the vibrational frequency of the molecule's atoms. The three aforementioned molecules' atoms have several modes of vibration due to their bonding structure and some of those modes match IR frequencies, and so that IR energy is absorbed which increases the KE of the molecule, which in turn passes on that increased KE to any colliding air molecule. Temperature is the average KE of a system, and so with added KE in atmospheric molecules, the average temperature of the atmosphere increases. I am making a video about this but not sure when it will be posted. Hope that makes sense.
This video really helped me alot to understand this. At a first look,this looks very complicated and complexed but it is actually pretty logical and easy if you understand the basics.
As long as the electronegativity difference is small enough. For example, HCl has too large of a difference and is polar. The C - S bond has a very small EN difference, however they do not form a diatomic molecule. I would say most elements with small electronegetivity differences do not form diatomic molecules, and so in those cases you have to account for all of the bonds in a multi-atom molecules, which the following video shows how to do: ua-cam.com/video/72CQe-_PJU4/v-deo.html
At 7:19 the blue arrow points toward one fluorine atom instead of between them as 7:23 shows from off the Boron atom. Plus the red triangle arrows appear incorrect pointing counter clockwise. Anyone elaborate?
👌Watched again, the triangle's corners are not the molecule's atoms but direction of polar bonds. The arrows point out from the boron atom center, but the triangle is another way to show polarity.
what about the compound CH3I? is it polar? I'm asking because it has the iodine atom that has a similar electron-negativity of carbon, but it has a higher electron-negativity of hydrogen.
You know your real life chemistry teacher sucks at teaching when you have to watch UA-cam to understand what she said. Great video by the way
PREACH
Same here, got a quiz coming up and she summed up everything within one class, barely explaining anything
I appreciated this video. My professor did not take the time to explain this this way
mine just wasant there cause she had to bring students to a competition usually i can understand :)
I feel you m8
wow, well that sums up 5 months of confusion.... 👌
I get u bro
Hi, as a professor of general chemistry I have used your videos on atomic orbital hybridization and this one to help my students. Your 3D graphics are particularly helpful for these topics. Thanks for doing this!
It is always particularly gratifying to hear from instructors. Thanks!
Thank you for taking the time out and trying your best to help your students. Most teachers are not that humble so they won't look for other sources of information.
Wow, I reviewed this several times and in just a short while and understand so much. Our whole class is a bit confused because of our chemistry teacher, is doing a terrible job. He wings it in class, is disorganized and unprepared and explains thing in pieces and jumps around. Maybe Ph.D.'s should continue to refine their methods to be able to explain it to us, laypersons. It's so sad that a professor can make so much money and we pay so much tuition and get a better education from youtube for free. FANTASTIC JOB TO THE AUTHOR HE UNDERSTANDS HOW TO TEACH.
WTF!!! I'm gonna cry😭.. I almost give up because of too much confusion about this topic. But this video really really helped me erase my confusionssss. You're the best teacher!!
Thanks! Glad it helped!
Brilliant explanation. What I didnt understand in 10 chemistry classes was explained to me easily in 10 minutes
Not sure whether u going to read this but Daaaaaaammmn u saved my ass
You have no idea how hard it was to find a video that actually explained this well. Yesterday I found a website that has very simple breakdowns of chemistry terms and now this! I'm on a roll! Thank you thank you thank you :D
What website? Do u mind linking me to it?
@@zxnblxx9824 I'll find it when I get home this evening :)
@@angelaisacliche are you at home yet?
this is perfect. Exactly what I needed--clear, comprehensive, beautiful graphics!
Best educational Chemistry videos ever. Seriously guys you deserve an award or something.
this is literally genius, i'm recommending it to all my friends!
Thanks!!
Thank you for being the only person who actually makes chemistry easy and sensible.
Thanks, and thanks for watching!
Great! I did understand it better, than my teacher discussing for almost 1 hr.
This explained it so much better than any textbook I've yet read. Thanks mate!
You're welcome!
Now I get it! This is probably about the 5th video i've seen on polarity and this one is the only one to has it make sense for me. Thank you Crash Chemistry Academy!
This was really appreciated. The pictures and way you explained it made it seem so much easier to understand. I shared with my classmates-THANK YOU!!
Thank You!
this literally summed everything up for me thank yo so much my professor goes through 8 topics in an hour and demonstrated once this saved me
The positive comments for this video are well deserved. The COVID-19 shutdown happened just as we were beginning this topic with my high school chemistry class. I know this will help my students interested in continued learning, and in fact I am going back to make a few tweaks to my instruction based on your approach.
Thanks so much! It is always gratifying to hear from other teachers! I teach high school chem in Illinois.
Thank you for the tutorial, now I can find and differentiate by myself whether the molecule is polar or non-polar. Once again thank you sir for the explanation.
Been wandering around few videos and textbooks to understand this. Thanks a lot!
literally a life saver. I'll come back with a score on my CHM101 exam!
This is so awesome. I understood from beginning to end, something sorely missing than the other vids I looked at. Very clear, and your illustrations really nailed it. Thank you!!!!!!!!!!!
Yep 👍
Thank you so much for this video! My teacher never really explained any of this to us so this was really helpful:)
I feel like it all makes sense, but there are too many rules and caveats for me to remember. I have to keep coming back to videos like this to make I know what I'm doing. Thank you, you have saved my grade.
This was the most helpful video I have ever seen for chemistry!
AHHH I was freaking out last minute cause I didn't understand this in my Chem 20 class. Thanks, this cleared up the confusion!!!
you are a life saver!!! and a day before the exam!
Sometimes I doubt if I really have to go to school. UA-cam makes lessons easier, more than a two-hour classroom discussion. This one saved me for my Chem exams
I was having a hard time understanding polarities of molecules but when I watched your vid, everything was clear. Thank you!
I wish my teacher explained it as simple as you did! Thank you for this!! :)
Finally an useful video that actually explains things
Quick question doesnt the lone pairs also cause partial positives and partial negatives?
Not really. The dot & dash structures do not show all the other electrons that exist below the outer shell, and do not show how many protons are in the atom. And that is not necessary because in a molecule, each atom contributes an equal amount of protons and electrons to the compound. So it is the electronegativity differences that are relied upon to indicate how uniformly those electrons are distributed. Any differences in electronegativity changes the electron density around one atom versus another, resulting in concentration of charge on one part of the molecule versus another part, and this is what we call polarity.
@@CrashChemistryAcademy So would H2S be polar or non polar since the end difference is less then 0.5
It would be slightly polar, have a small dipole
This was amazing! I absolutely loved the flowchart idea - it really helped me organize my notes & my thinking, and then teach the concepts to my (very bored) mother after I learned them properly! Thanks for being so organized & efficient in your teaching process, with a wealth of possible examples! Elle
I'm glad it was helpful!
Thank you so much, this was a great help. It was really easy to understand and clear up all my confusion.
I'd been looking for something like this, thank you, concise and great explanation.
I'm glad it was helpful!
this dude deserve a million sub, thank you sir
Good timing~
I was learning more about those.
It's amazing how more efficient you teach than the teacher I currently have in college. Thank you!
Thanks!
Hi, I have a question. According to the video, we need to check if there is any polar bonds. For PH3, since they have the same electronegativity, they have no polar bonds at all then they are supposed to be non-polar. But in my test, I wrote non-polar and I got it wrong.
Not sure what level your chemistry class is. Phosphorus has a Pauling EN of 2.19, and hydrogen is 2.20. The difference seems negligible, so the polarity considerations would have to take into account the lone pairs on the phosphorus as well as formal charge, and of course the pyramidal shape. My video was aimed at an introductory level and so did not address those issues.
The best video I have found on this topic yet!
Your animations and explanations are excellent specially hybridization video. Thank you. The only point I would make in the polarity lesson is regarding ozone, which is polar. The definition of polarity is based on what you stated at the very beginning, which is asymmetrical distribution of electron density around the molecule. Because ozone has a lone pair and is bent, the electron density is not evenly distributed. It does not matter if O-O bond itself is non-polar. Dipoles will not cancel out.
Yes, I learned this sometime after making the video. I will have to post a correction, thanks for the reminder!
You saved my life. Best Chemistry man N/A
Wow!!! very clear explanation. So helpful. Thanks for sharing po.
Legendary explanation. Thanks a lot
Thank you. Your explanation is so clear and it really helps me understand this lesson.
It's really helpful for me... Thanks alot
GREAT! Thanks so much! Your presentation really drives home the point. Beautifully done.
Thank you so much. I am actually taking General Chemistry 1B, and the first test actually covers this.
I am a math teacher and assign to teach physical science where first part is chem. Thank you for this video. I can now teach it to my learners
Thanks so much. It is always very gratifying to hear from teachers!
Yes I knew it. Coz I also upload tutorials on my other account... Please continue doing videos like this. Youre amazing
Not the type of guy to be positive in the comment section, but this is a very good video. Thank you for teaching me when my teacher couldn't.
Beautifully explained, thank you!
This was so helpful! Clear Explanations and great diagrams! :)
This is a good summary video indeed. I wish I watched this in the beginning of this term:))
This very well explained by the simplest way possible the dipole and the dipole moment.
This is an excellent video! Thank you so much!!!
This is the best explanation so far!
4:52 I stopped comprehending ;-; I'm better with the EN difference but idk which is the one being subracted if the center one has less of an EN than the ones bonded to it. And at this point he stops mentioning it? Can any one help ;-;
This is amazing! This helped me so much. Thank you.
Thanks dude 👍 the explanation was freaking awesome 👍
thank you so much for your educational and effective videos! i understand everything you explain and i really appreciate your work. btw i'm switching from applied biology to chemistry this semester 🙏
Thanks so much. Good luck with chemistry, a great thing to study!
O M G! teach me everything you know. thank you!!!
Watching this an hour before the test. I wonder why I am even attending lectures when everything is summed up in 10 minutes.
YOU'RE A LIFESAVER. 😭
Teacher, 10:16 You could to pair both trigonal planar and pyramidal, in the illustration next time.
trigonal planar has no eletric negative charge. Bu pyramidal has uneven distribuion of electric negative charge. Right?
Amazing video, super clear!
You cleared all my doubts.. thanks....😊😊
One of the best explanation of the topic. Thank you, sir.
Thanks and you're welcome!
@@CrashChemistryAcademy Sir, I want to learn more Chemistry frm you, Is there any way?
I promise to be yr best student because I've really connected w/ yr teachings.
I'm retiring from teaching in June and will probably look for students to tutor through my youtube channel. I'm sorry but no time until then.
@@CrashChemistryAcademy Sir, can you provide me any mail where I can ask you doubts even if you don't teach me, is that possible?
Thank you very much, this is way much easier to understand than to read books.
We have a test later. Thanks for these!
This is an excellent video, very helpful, thank you so much.
thank you sir! this was very helpful
👍That was a great explanation. Thank you
sir, your explanation is super clear to me. As u mentioned, CO2 is a nonpolar molecule since its polarity cancels out, but why does it absorb infrared and contribute to Green house effect , because as we kNow that only molecules that show polarity absorb infrared
I'm not sure there is a link between polarity and specific EM frequency absorbed. The two worst greenhouses gases (IR absorbing), methane and CO2, are completely non-polar. Water is very good at absorbing IR and is polar but the amount of water vapor that can be held in the atmosphere is limited to a maximum vapor pressure, which of course increases with temperature. The mechanism of IR absorption is the matching of IR frequency of EM oscillation with the vibrational frequency of the molecule's atoms. The three aforementioned molecules' atoms have several modes of vibration due to their bonding structure and some of those modes match IR frequencies, and so that IR energy is absorbed which increases the KE of the molecule, which in turn passes on that increased KE to any colliding air molecule. Temperature is the average KE of a system, and so with added KE in atmospheric molecules, the average temperature of the atmosphere increases. I am making a video about this but not sure when it will be posted.
Hope that makes sense.
You saved my life
Your videos are fantastic, so helpful, thank you
This video really helped me alot to understand this. At a first look,this looks very complicated and complexed but it is actually pretty logical and easy if you understand the basics.
can atoms be different and still form a nonpolar molecules? maybe have the same/very similar electronegativity?
As long as the electronegativity difference is small enough. For example, HCl has too large of a difference and is polar. The C - S bond has a very small EN difference, however they do not form a diatomic molecule. I would say most elements with small electronegetivity differences do not form diatomic molecules, and so in those cases you have to account for all of the bonds in a multi-atom molecules, which the following video shows how to do: ua-cam.com/video/72CQe-_PJU4/v-deo.html
I been looking for a video like this!!
I'm sorry, How the explanation about semi polar sir ? Like ethyl acetat? Thanks
Your explanation is very easy to understand...
Thank you so much!!! such detailed explanation and examples!!!!!!!! finally understand
At 7:19 the blue arrow points toward one fluorine atom instead of between them as 7:23 shows from off the Boron atom. Plus the red triangle arrows appear incorrect pointing counter clockwise. Anyone elaborate?
0-Zone I think you need to rewatch that part.
👌Watched again, the triangle's corners are not the molecule's atoms but direction of polar bonds. The arrows point out from the boron atom center, but the triangle is another way to show polarity.
0-Zone it’s kind of difficult to explain online but the video is correct, I think you’re misunderstanding some things
I agree with the video, my 2nd comment's a correction of my misunderstanding the polarity triangle.
Thank you so much, this videos is a such a gem of my understanding of polarity in molecules thank you! ;__;
You're welcome!
Chemistry is the most bloody subject in our school.
what about the compound CH3I? is it polar? I'm asking because it has the iodine atom that has a similar electron-negativity of carbon, but it has a higher electron-negativity of hydrogen.
Fantastic, succinct explanation. Thank you.
You're welcome!
My professor sucks at explaining these simple concepts Thanks.
Thank you so much! It literally help me!😳
Fantastic - is the word I will use, thank you so much 🙏
how about ph3 //is it polar?? you said without polar bonds it can t be polar but i think ph3 is polar
This video was amazing, thanks.
God bless you. You're a good teacher.
Thank you!
this makes a lot of sense, thank you!
Great tutorial!! where can i get an image of the periodic table that includes the electronegativity at the bottom right corner for each element?
Thanks! I put a link in the description under the video window.
@@CrashChemistryAcademy I got it, thank you!
If their is a option of liking 10000 times i will click that . thank you sir for giving such a good explanation.
😀😀
Thanks!
my nigga this shit is fire
This is an excellent video!!!
This has been so helpful thank u so much!!
well explained. thank you so much.
YOU SAVED ME THANK YOU
This is great. I love your work. 👍
Thanks!