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Good Morning. Bacira Akther Khatun Lecturer Department of Chemistry Comilla Cadet College. Presented By. Class : XI From : A Duration of the period : 40 Minutes Date : 08-03-2013. Metal. Duralumin Al – 95%

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Presentation Transcript
slide2

BaciraAktherKhatun

Lecturer

Department of

Chemistry

Comilla Cadet College

Presented By

slide3

Class : XI

From : A

Duration of the period : 40 Minutes

Date : 08-03-2013

slide4

Metal

Duralumin

Al – 95%

Cu -4%

Mg- 0.5%

Mn- 0.4%

Alloy Metal

slide5

Intro

Today’s topic

Hybridization - SP3

slide6

By the end of this class they will be able to

say what is Hybridization

say Characteristics of Hybridization

3. explain formation of SP3 Hybridization

4. analyze shape and bond angles of molecule having SP3 hybrid

slide7

Atomic Orbitals

CH4

Valence bond theory

Number of unpaired electron indicates valency

1

1

2

H

Cl

O

1S1 - 1

1s22p6 3s23p5 - 2

1s2 2s2 2p4 - 2

Be

B

C

2

3

4

1s2 2s2 - 0

1s22s2px1 - 1

1s2 2s22px1 2py1 - 2

slide8

Excited state

Be

B

C

1s2 2s1 2px1 - 2

1s22s2 2px1 2py - 3

1s2 2s1 2px1 2py1 2pz1 - 4

2

3

4

In CH4 C -H → 415 kj/mol

H- C – H 1090 28`

Hybridization Theory

slide9

Two or more 0rbital nearly same

Pauling lius , USA. 1901- 1994

slide10

Excited state

Sp3 state

Carbon atom in its ground state

slide11

2p

Sp

2p

2S

2S

1S

2S

2S

Excited state

Carbon atom in its ground state

Sp3 state

slide13

Hybridization

Hybridization is a process (not phenomenon) of mixing up of two or more atomic orbitals to form equal number of orbitals of equal strength. The orbitals which are formed are known as hybrid orbitals

a process

mixing up

equal number

atomic orbitals

equal strength

The energy of each hybrid orbital is lower than the participating atomic orbitals.

slide14

Every body will do this work --- within -- 5 min

Write down the center atom hybridization of the following compound and ion

CH4 CCl4 SiH4 NH3 BH3-

slide15

The number of hybridized orbitals is equal to the number of orbitals being hybridized.

  • The hybrid orbitals are identical in shape and have equivalent energy.
  • The hybrid orbitals are more effective in forming stable bonds than the pure ones.

The type of hybridization indicates the geometry of the molecules

Characteristics of hybridization:

slide17

Group Work - Dear cadets, divide into five groups

Draw the bond angel and name of the shape of the following molecules : within 5min

Group - 1 → CH4

Group - 2 → SiF4

Group - 3 → NH4+

Group - 4 → H2O

Group - 5 → F2O

Tetrahedral , 109. 50 (1,2,3)

slide18

Molecular shape and orbital hybridization Video

Shape 5

Shape- 4

Shape-3

Shape-2

Shape 1

slide23

Prep task

Observe the following chart and answer the question

Analyze the following compounds shape with the figure of Hybridization

(1) TA4- (2) RA4 (3) qA4+ (4)A2Z (5) RY4 (6) SY4 (7) A2P (8) SX4

(9) X2Z (10) pY2

Every body will finished the prep task by next Monday

And submitted it