Predicting Bond Angles

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Predicting Bond Angles

Рет қаралды 442,771

Күн бұрын

This organic chemistry video tutorial explains how to predict the bond angles of certain molecules.
Organic Chemistry - Basic Introduction: • Organic Chemistry - Ba...
Which Bond Is More Polar?
• Which Bond Is More Polar?
How To Draw Lewis Structures:
• Organic Chemistry - Ho...
Condensed Structures to Skeletal Structures:
• Condensed Structures t...
Functional Groups Review:
• Functional Groups
Primary, Secondary, & Tertiary Functional Groups:
• Functional Groups - Pr...
_________________________________
How To Calculate Formal Charge:
• Formal Charge
Finding Lone Pairs Using Formal Charge:
• How To Identify The Nu...
Dipole Moment & Electronegativity:
• Dipole Moment, Vectors...
Predicting Bond Angles:
• Predicting Bond Angles
Valence Bond Theory:
• Valence Bond Theory & ...
Hybridization of Atomic Orbitals:
• Hybridization of Atomi...
_______________________________
Bond Strength and Bond Length:
• Bond Strength and Bond...
Orbital Overlap and Bond Length:
• Hybridization, Orbital...
Organic Chemistry PDF Worksheets:
www.video-tuto...
Organic Chemistry Exam 1 Playlist:
bit.ly/3kJnNXU
Full-Length Videos and Worksheets:
/ collections

Пікірлер: 167

@TheOrganicChemistryTutor Жыл бұрын

Organic Chemistry PDF Worksheets: www.video-tutor.net/orgo-chem.html Full-Length Exams and Worksheets: www.patreon.com/MathScienceTutor/collections Next Video: kzfaq.info/get/bejne/eqiipJZi3J7ac2g.html

@cardcaptorsakurax16 5 жыл бұрын

WHY AM I paying my tuition for my damn garbage professor that cannot teach me a single thing but I’m learning so much more from you for free.... please replace my professor 😭

@cindysu9185 4 жыл бұрын

im with u

@prateeksharma2331 3 жыл бұрын

It's not like ur proffesor is bad it's like ur not studying with concentration in his class and then when u miss something u come running here on KZfaq to understand with concentration

@Noone-qi1ve 2 жыл бұрын

@@prateeksharma2331 I mean.... I doubt you know his professer, he might as well be a bad teacher

@mingto2818 2 жыл бұрын

@@prateeksharma2331 hi prof

@harrisonbrand8985 2 жыл бұрын

@@prateeksharma2331 you really think bad professors don’t exist? go lick some boots lol

@turtlebutt1574 3 жыл бұрын

okay but how do i FIND it? How do i CALCULATE it? You're just giving us the answer. Are we supposed to like memorize it?

@SuperShadowP1ay 3 жыл бұрын

That's what I came here to find out. Looks like we're outta luck

@ewnetmussie3674 3 жыл бұрын

that's my question too

@discostu4275 3 жыл бұрын

You just have to memorize it...

@discostu4275 3 жыл бұрын

Scientists have already figured it out experimentally

@alanjacob1488 3 жыл бұрын

Study steric numbers and VESPR theory. Then you will get it. The video seems kind of pointless though. Tyler Dewitt, Khan Academy does a pretty good job of explaining this concept. Bit difficult to grasp but after initial struggle it is very easy. Practice is the only solution in Chemistry.

@jianghaoyoutube5017 4 жыл бұрын

THIS IS THE METHOD FOR CALCULATION BOND ANGLES. Doesn't work for all molecules but... Every lone you have, subtract 2.5° degree from 109.5°. Eg. H2O (H=O=H) Oxygen has two long pairs. Subtract 5° from 109.5°=104.5° (109.5° is the bond angle of tetrahedral shape molecule)

@fortuneless 4 жыл бұрын

but PH3 has only 1 lone pair if i substract 2.5° from 109.5° i get 107°. but the bond angle of PH3 is supposed to be 93.6° my exams are in like 3 hours.

@Mr-E. 4 жыл бұрын

@@fortuneless Interesting - is PH3 maybe an exception but otherwise Jianghao's method works?

@jianghaoyoutube5017 4 жыл бұрын

@@fortuneless sorry for late reply. The method I used probably only work on certain molecules or compound. It was taught in my A level (highschool) text books.

@fortuneless 4 жыл бұрын

@@jianghaoyoutube5017 bruh i passed got 20 out of 30 (answered 21)

@TitanTubs 4 жыл бұрын

How does that work with the example at 1:30 .. the bond angle is 120°. doesn't work with trigonal planar.

@elliekopanezos2550 4 жыл бұрын

this is really saving me the night before my final lmao

@ifloat1119 4 жыл бұрын

same

@xuanviet807 3 жыл бұрын

how did it go lol?

@bitcodelabs4660 2 жыл бұрын

My teacher is garbage

@elliekopanezos2550 2 жыл бұрын

@@xuanviet807 hey! i failed!

@xuanviet807 2 жыл бұрын

@@elliekopanezos2550 calm down my man, next time you'll get better marks

@mattNYSD 4 жыл бұрын

An explanation as to why the NH3 and CH3CN molecules have the bond angle they do would be far more helpful here, rather than just trying to memorize them.

@meghang9517 3 ай бұрын

im not sure if this will help but it’s basically to make room for the lone pair of electrons

@meghang9517 3 ай бұрын

it’s almost like in NH3 there are 4 areas of electron density but because there are three bonds and one lone pair it is pyramidal with a diff bond angle

@valentai_777 Ай бұрын

@@meghang9517whatever the fuck that means

@i_am_gods_child 3 жыл бұрын

for the people asking, yeah you do have to memorise them (for this level of chemistry anyway) - the 3D structure of the molecule if it has X number of bonding pair electrons and Y number of lone pairs around the central atom (when you draw out the Lewis structure), and what will the angles be, and what do we call that structure (trigonal pyramidal, trigonal planar etc...) Its about how much electrons repel eachother, and lone pairs will have a higher density so sorta 'squash' the bond angle more. I'm sure there is a good video about it somewhere! :)

@imstillaj 2 жыл бұрын

I'll pretend i understood that

@nafisaanjoom3021 2 жыл бұрын

Intelligent ARMY!! 💜

@WhiteChocolateSyrup 2 жыл бұрын

Going to have my chem final on Monday! These videos have been helping me all semester. God bless you

@YO-gk9zh 2 ай бұрын

Did you pass?

@WhiteChocolateSyrup 2 ай бұрын

@@YO-gk9zh Yes I did! Then I went on to change my major and never took another chemistry class lol

@HydrogenTwoO Жыл бұрын

Last semester I watched your VSEPR theory videos over and over. It took me a while to understand this. I'm studying for the 2nd semester of O chem, and I got to this video without any issues, and THROUGH this video understanding and predicting correctly! You are an incredible teacher.

@ch1namaan 4 жыл бұрын

How is this useful... He's not telling us how to find the bond angles, he's only telling us what the bond angles are.

@zannysquad8546 4 жыл бұрын

honestly yes. this is just memorization

@erikar6401 3 жыл бұрын

I’m so confused rn

@anthonytakouam4324 Жыл бұрын

yea i was like wtf is this haha

@blahblah6123 4 жыл бұрын

i still dont get it ..

@jianghaoyoutube5017 4 жыл бұрын

You can calculate it. Every lone you have, subtract 2.5° degree from 109.5°. Eg. H2O (H=O=H) Oxygen has two long pairs. Subtract 5° from 109.5°=104.5° (109.5° is the bond angle of tetrahedral shape molecule)

@bryanchavez1362 4 жыл бұрын

Jianghao KZfaq wow, simply wow

@notWaldont 4 жыл бұрын

@@jianghaoyoutube5017 the real pro tip is in the comments.

@zannysquad8546 4 жыл бұрын

@@notWaldont it doesn't really work for everthing. only tetrahedrals

@sonalgramopadhye2761 4 жыл бұрын

@@jianghaoyoutube5017 does that only work for tetrahedral compounds?

@noname-fp3kh 5 жыл бұрын

I like the little tips you put in the explanation

@MrJuan5278 5 жыл бұрын

This man is a genius.

@zihxxn5171 4 жыл бұрын

Nah yu are just dumb

@smartscience5305 3 жыл бұрын

HeLLo I am just 12 years and I saw this vedio easy and extremely easy!!! Your vedios are really great. ThAnKs VeRy MuCh

@EagleMiner 3 жыл бұрын

I do love the 10-20 seconds of silence at the end of every video

@rahulkumarkp503 Жыл бұрын

Thank you Tutor , these videos have been helping me a lot !

@nakulsindhwani1841 6 жыл бұрын

So are you going to change the name of your channel ??

@shannellemuparuri3827 3 жыл бұрын

It really helped me.. Thank you so much, wished I had known earlier about this page

@alfred5338 4 жыл бұрын

I don’t even take chem but i like watching your videos for fun lmao

@jimhalpert9803 4 жыл бұрын

Lmao noice

@zeekstersthename8014 5 жыл бұрын

I just want to say that you are one of a kind! I don't think your human..Welcome to our human Earth Mr.Organic Tutor!

@ankitjha3896 6 жыл бұрын

trust me, You are awesome bro ......keep going on.... big fan ... please make videos on physical chemistry ..... 😎😎😎

@thepanda145 3 жыл бұрын

I’m literally walking to my AP Chem Exam rn, I’m 2 mins away

@anthonytakouam4324 Жыл бұрын

rip

@secretgarden8142 3 жыл бұрын

Thank you (Wed 16 Dec 2020, 5:53 AM)

@rogersowden2369 4 жыл бұрын

Yeah but how do u calculate the angle? Or do you just memorize it?

@mashuknabi2298 4 жыл бұрын

Memorization

@jianghaoyoutube5017 4 жыл бұрын

@rogersowden2369 4 жыл бұрын

Jianghao KZfaq But why 2.5 and why do you minus it?

@jianghaoyoutube5017 4 жыл бұрын

@@rogersowden2369 idk but I was thought in school 😂

@jasdrawssometimes4660 4 жыл бұрын

Mashuk Nabi you're fucking kidding me right? You're KIDDING ME! HAHAHAHAHAHA MY GRADES FUCKED!

@carlossantana8306 4 жыл бұрын

You should do a video on symmetry operations/point group

@trendswithjotham 10 ай бұрын

I want you to go into Mathematical Methods please 🙏.....I really struggle finding videos on KZfaq associated with it

@skull_brawlstars3091 5 жыл бұрын

In H2O eg why u took 2H downward and why not in a straight line which makes an angle 180??

@Hanna-gr5mv 5 жыл бұрын

Because The lone pairs push the hydrogen down ward

@static4802 5 жыл бұрын

@@Hanna-gr5mv Do the lone pair electrons in Oxygen's valence shell repulse the bond pair electrons that are covalently bonded with Hydrogen?

@emilyleighton2984 5 жыл бұрын

Abrar Mahadik yes

@bryanchavez1362 4 жыл бұрын

Skull_ Brawl Stars electron repulsion pushes bonded pairs away from the lone pairs

@ChemistryRRR 3 жыл бұрын

Hybridization of of Water Molecule is Sp3 and u know the concept of VSEPR Theory , Lone pair- lone pair- repulsion> lone pair- bond pair repulsion > bond pair- bond pair repulsion. So , oxygen having two lone pair in water molecule that's why bond angle of H2O is 104°

@prelanreiss80 4 жыл бұрын

Does NH3 and PH3 and AsH3 bond angles the same

@Travelingsurgeon116 6 жыл бұрын

I have inorganic chemistry ....nice video.😊😊😊

@runnerkidal 5 жыл бұрын

good for you :) - here's a medal "medal"

@kuntakintedd5328 5 жыл бұрын

everything was good till 3:30... i was like damn where did it go from 0 to 100 i just wanna pass fck straight A's

@vihanya. 3 жыл бұрын

Guys, we have to memorise these bond angles.

@ronin6158 2 жыл бұрын

wouldnt the much larger O push the H's around further on the plane? ie: make the H's closer.

@fg45zaza22 5 жыл бұрын

Thanks you very much 💟 You are the best Learn me a lot

@internois8181 4 жыл бұрын

U re the best bro

@jannellezamora5084 3 жыл бұрын

why isnt it 90 degress for the HcH ?

@fredt8167 4 жыл бұрын

I know the lone pair electrons are involved in determining the shape but how do you know... how the lone pairs will react with the other atoms that are bonded to predict its shape?

@zannysquad8546 4 жыл бұрын

most atoms will have 8 electrons around it (octet rule)

@nurulsolehah6801 2 жыл бұрын

The lone pairs will repel the electrons in the bonds with the other atoms. Thus, have smaller angles than a molecule with the same number of bonded pair...if you get what I mean. Hope it helps.

@imtypingwords 3 жыл бұрын

But how do we know they are those angles? Like, is this just a theory? Did someone measure the angle? What experiment proves these angles? How do we verify said angles? I'm not in college or know much about chemistry but I question how any of this is known when we can't when see these things.

@prismaticerror6911 Ай бұрын

This is a theory, meaning it's the closest thing to truth the universe has. We actually can see atoms using special microscopes. For measuring charges and shit I recommend looking it up online, there are tons of experiments that go into things like this

@TanakaChonyera 6 жыл бұрын

Is Mark Wahlberg doing the voice over?

@blakeknight12387 4 жыл бұрын

This was not helpful at ALL. You just listed the angles but didn't explain how to get them. WHYYY?

@zannysquad8546 4 жыл бұрын

lol fr

@rohanbarde5958 3 жыл бұрын

I don't think there is a specific method to find bond angles, it all depends upon hybridisation and no. of lone pairs and bond pairs !!! U can predict some but mostly memorization!!

@mandyogoe7315 3 жыл бұрын

How do you know how much bonds the atoms like to form?

@insidethebox2470 2 жыл бұрын

How many electrons it needs to become stable

@arohisharma3335 Жыл бұрын

Love from india

@caroline-pm4mo 4 жыл бұрын

what grade do you learn this?

@bebridge3023 3 жыл бұрын

11 i think

@zqgb 2 жыл бұрын

QUESTION - How would I know if a molecule is bent? Thanks :)

@vishweshpande7271 2 жыл бұрын

Its mostly due to lone pair repulsion, look for lone pairs.

@bubblecakke 2 жыл бұрын

MY FKKN FINALS ARE AFRER 2 WEEKS I AM SO FKKN CONFUSED I DON'T KNOW WHERE TO START FROM UGHHHHH

@emmanuelonyedire8785 Жыл бұрын

Nice❤ keep it up

@smartscience5305 3 жыл бұрын

I am twelve year old and i solve it: Glycerine Glossary of C3H8O3; OH | HO\/\/OH

@kyle-tg7bi 3 жыл бұрын

girl I was playing with dolls when I was 12

@smartscience5305 3 жыл бұрын

@@kyle-tg7bi 😀😀😅😄

@sohatsharma2004 5 жыл бұрын

why is the second one linear molecular shap. Isnt the molecular shape bent and tetrahedral.

@sammadsaeed3373 5 жыл бұрын

Nope the second one has 2 bonding pairs and no lone pairs. Remember those 3 bonds N made with C we count that as 1 in bond angles! But there is no lone pair as carbon is making 4 bonds. So the central carbon makes 1 with the other carbon and makes the rest with nitrogen. It is like this C-C---N ( 3 lines are the 3 bonds). This is linear. Bent has a 120 degree angle if there are 2 bonding pairs and 1 lone pair or of there are 2 bonding pairs and 2 lone pairs!