5.1 VSEPR model Flashcards

0
Q

what does VSEPR stand for?

A

valance shell e- pair repulsion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
1
Q

what is the name given to the 3D arrangement of atoms in a molecule

A

molecular structure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

when is VSEPR best utilized?

A

to predict the 3D geometry of molecules formed from nonmetals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

the main idea of VSEPR

A

is to minimize e- pair repulsions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is the degree of the angles in a tetrahedral structure?

A

109.5

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

when should prs of e-‘s be arranged tetrahedrally?

A

when there are 4 prs of e-‘s around an atom

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is the first step in a VSEPR model?

A

draw the lewis structure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is the 2nd step to a VSEPR model?

A

count the e- pairs and arrange them in a way that minimizes repulsion (put them as far apart as possible)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is the 3rd step in a VSEPR model?

A

determine the positions of the atoms from the WAY the e- pairs are shared

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

when does a molecular structure VSEPR model get named?

A

after the positions of the atoms is determined in step 3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

which requires more room? bonding pairs or lone pairs?

A

lone pairs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

because lone pairs require more room than bonding pairs, what happens to the angles between the bonding pairs?

A

they get compressed to give the lone pairs more space on the orbitals of the atom they belong to.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the arrangement of 2 e- prs around an atom that yields minimum repulsion

A

linear

180 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is the arrangement of 3 e- prs around an atom that yields minimum repulsion

A

Trigonal planar

120 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

the tetrahedral arrangement of e- pairs is used for how many e- pairs?

A

4

109.5 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

the trigonal bipyramidal arrangement of e- pairs is used for how many e- pairs?

A

5

120/90 degrees

16
Q

the octahedral arrangement of e- pairs is used for how many e- pairs?

A

6

90 degrees

17
Q

what is the molecular structure of a molecule with 4 bonding e- pairs?

A

tetrahedral

18
Q

what is the molecular structure of a molecule with 3 bonding e- pairs and 1 lone pr?

A

trigonal pyramid

19
Q

what is the molecular structure of a molecule with 2 bonding e- pairs and 2 lone e- prs?

A

V-shaped (or bent)

20
Q

what is the molecular structure of a molecule with 5 bonding e- pairs?

A

trigonal bipyramid

21
Q

the see-saw structure is seen in molecules with how many bonding and lone pairs?

A

4 bonding

1 lone pair

22
Q

the T-shaped structure is seen in molecules with how many bonding and lone e- prs?

A

3 bonding

2 lone prs

23
Q

what are the possible molecular structures for molecules with 4 e pairs?

A

tetrahedral
trigonal pyramid
v-shaped (or bent)

24
what are the possible molecular structures for molecules with 5 e- pairs?
trigonal bipyramidal see-saw t-shaped linear
25
in VSEPR model, a double bond is counted as
on effective pair
26
when a molecule exhibits resonance, which resonance structure should be used to predict the molecular structure in the VSEPR model?
any of them
27
what degree angle provides lone pairs with enough space so that distortions do not occur?
120
28
the mixing of the native atomic orbitals to create special orbitals for bonding
hybridization
29
sp3 hybridization or saying an atom is sp3 hybridized means
its orbitals formed from 1 2s and 3 2p orbitals (s1p3)
30
whenever a set of equivilent tetrahedral atomic orbitals is required by an atom in a molecule, the model assumes that the atom adopts a set of ___ orbitals; the atom is ____ ________
sp3 | sp3 hybridized