4.2.7 Predict the Shape and Bond Angles of Simple Species IB Chemistry

Valence shell electron pair repulsion (VSEPR) theory enables you to draw out the Lewis structures. By then counting the charge centers the molecular geometry can be worked out.

http://showcase.unis.org/SciLproJ/

Category:

Education

Tags:

• molecular geometry
• Lewis structures
• tetrahedron
• charge centers
• IB chemistry
• gmod
• 4.2.7

[diznikkatuan]

sounds like a fun video, but not helpful, since u just go ahead and draw the Lewis structures and do your own prediction without teaching us how you got that answer. Too fast for me to follow! But thank you.

[richthornley]

@diznikkatuan I agree! I am working on another video to fix this!

RT

[PeachBunPanda]

Great video!!!!! It made me understand so much better. And the accent made listening to you verrrry fun. I think all teachers should adopt a cool accent. (: make more for us when you can!

[richthornley]

@PeachBunPanda Thanks buddy!

[iFawzi619]

what do you mean by 2/3 charged centres?

[richthornley]

@iFawzi619 Charge center is easy to spot, hard to explain but I'll have a go.

You know that methane has 4 electron pairs around central C atom = 4 charge centers

The central C in CO2 has 2 charge centers (a double bond to the left, and a double bond to the right)

BH3 has 3 charge centers around the B (= 3 x electron pairs)

Its similar to a grouping of electron pairs OR

Lone pair = 1CC, Bonded pair = 1CC, Double bond =1CC, Triple bond = 1CC.

The charge centers repel. Ouch , tricky question buddy!

[peterpiperspepper]

LET'S GO FOR A SWIM.

[madbouy]

haha, neat

[omfgmerry]

i wish this is how we learn in real life! lmfao this is UBER cute!

[keekiiD]

wayy too fast for me to follow..

[ShadCalGaming]

Im having trouble finding the bond angles of Threonine and the formula is C4H9NO3. Please help me out.

[MyAbzz]

this was a total waste of time u did not even state how we can predict the shape and bonding just by looking at the molecule