Hybridization

Part 2: Practice

ObjectiveToday I will be able to:

Predict the molecular shape of a molecule using the VSEPR theoryApply hybridization to determining the orbital shape of a moleculePractice identifying the hybridization characteristics of different molecules

Evaluation/ Assessment Informal assessment – Listening to group interactions as they complete the

hybridization practiceFormal Assessment – Analyzing student responses to the exit ticket and the

Hybridization practice.Common Core Connection

Make sense of problem and persevere in solving them Reason abstractly and quantitatively Use appropriate tools strategically Look for and make use of structure

• Warm – Up• Explain and Elaborate: Hybridization Notes

Part 2• Elaborate and Engage: Hybridization Practice• Evaluate: Exit Ticket

Lesson Sequence

• What are hybrid orbitals?

• True or false: The non-central atoms determine the hybrid orbital types for a molecule

• How many orbitals are in each of the following hybrid options:– sp3d– sp– sp3d3

Warm - Up

• Today I will be able to:Predict the molecular shape of a molecule

using the VSEPR theoryApply hybridization to determining the

orbital shape of a moleculePractice identifying the hybridization

characteristics of different molecules

Objective

• STEM Fair Presentations – January 22• Study for quiz!

Homework

• Warm – Up• Hybridization Notes Wrap-Up• Hybridization practice• Exit Ticket

Agenda

Hybridization

Finishing up the notes

BeF2

1) Focus on Be2) Write the orbital diagram for Be

**You need to have 2 e- available to bond to F3) Write a new orbital diagram4) Promote electrons

Hybridization

BeF2

Original

Hybrid

BCl3

1) Focus on B2) Write the orbital diagram for B3) Write a new orbital diagram4) Promote electrons

Hybridization

http://www.dlt.ncssm.edu/tiger/diagrams/moleculargeometry/BCl3_Hybrid.gif

Carbon has 4 valence electrons 1s2 2s2 2p2

2 of the electrons are in the s orbital and 2 are in the p orbital.

s & p have different shapes and different amounts of energy.

Consider CH4

To create 4 equal bonds, carbon’s one 2s and three 2p orbitals fuse into 4 new identical orbitals called sp3.

Consider CH4

2s

2p

sp3

Hybridization

• What type of hybridization does BF3 have?• 1s2 2s2 2p1

2s

2p

sp2

Hybridization

sp3

Empty hybridized orbitals are dropped

So sp3 becomes sp2

• Each lone pair of electrons has it’s own hybridized orbital.

• See next slide.

How do you include lone pairs of e- in hybridization?

Oxygen e- configuration 1s2 2s2 2p4

(Use oxygen because it is the central atom)

What type of hybridization does H2O have?

2s

2p

sp3

Hybridization

• Draw the hybridization orbital diagram for phosphorus in PCl3

Hybridization Practice

http://www.mhhe.com/physsci/chemistry/essentialchemistry/flash/hybrv18.swf

Try this hybridization animation

• Determine the shape and hybridization of the following molecules and its central atom– XeF4

– PCl5

– NH3

Exit Ticket