Lab Shapes of Molecules.

Slides:

Advertisements

Similar presentations

Molecular Shape Sect 9.4. VSEPR Model Valence Shell Electron Pair Repulsion Valence Shell Electron Pair Repulsion Electron pairs will position themselves.

Advertisements

Chemical Bonding Shape Lab. 1)One structural isomer only.

Copyright McGraw-Hill Chapter 9 Chemical Bonding II: Molecular Geometry and Bonding Theories.

AS Jul-12. BASIC IDEAS Shapes of molecules and ions depends on total number of electron pairs around the central atom. Two types of electron pairs:

X. VSEPR Theory – Valence Shell Electron Pair Repulsion theory. [Remember: Like charges repel!] Valence Shell Electron Pair Repulsion theory. [Remember:

Lewis structures & molecule shapes. AB or AB 2 – linear If there are only two atoms the shape will be linear – there are no If there are only two atoms.

Lab 6. Objectives  Correlate Lewis dot structures with electron domain geometries  View the effect of lone pairs of electrons on molecular shape.

Molecular shapes Balls and sticks. Learning objectives  Apply VSEPR to predict electronic geometry and shapes of simple molecules.

Warm-Up: to be turned in Write the electron configuration, noble-gas configuration and orbital notation for: Sulfur and Calcium.

Drawing Lewis Structures and VSEPR. Draw basic Lewis dot structures of atoms and compounds. Using VSEPR, predict bond shape from electron arrangement.

MOLECULAR GEOMETRY VSEPR ACTIVITY. CARBON DIOXIDE Chemical formula: CO 2 # of atoms bonded to central atom: 2 # of lone pairs on central atom: 0 What.

Molecular Shapes Chapter 6 Section 3. Molecular Structure It mean the 3-D arrangement of atoms in a molecule Lewis dot structures show how atoms are bonded.

Trigonal Bipyramidal Electronic Geometry: AB5, AB4U, AB3U2, and AB2U3

Carvone Bucky ball Molecular Geometry Chapter 8 Part 2.

VSEPR Theory Valence Shell Electron Pair Repulsion.

Molecular Shape Section 9.4

Molecular Geometry VSEPR Theory.

The Shape of Covalent Molecules

Topic: Molecular Shape Do Now: Draw the Lewis Dot Diagram for N 2 and C 2 H 2.

VSEPR. This is the shape that CO 2 makes. 1. Linear 2. Bent 3. Trigonal planar 4. Tetrahedral 5. Trigonal pyramidal 6. Trigonal bipyramidal 7. See-saw.

VSEPR Theory Valence Shell Electron Pair Repulsion.

VESPR Theory. Molecular Structure Molecular structure – _______________ arrangement of atoms in a molecule.

Molecular Shapes. VSEPR Valence Shell Electron Pair Repulsion The main idea is that electrons don’t like to hang around near each other because they repel.

Molecular Shapes Chapter 6 Section 3. Lewis dot structures show how atoms are bonded together, but they often do not illustrate the true shape of a molecule.

VSEPR Notes & Lab GT Chemistry 12/15/14. Drill Draw Lewis structures for –CH 3 Br –NH 3 –HCl (that’s hydrogen chloride, not carbon/iodine) –AlF 3 HW:

Chapter 9 Molecular Shape.

The Shapes of Molecules

Molecular Geometry and VSEPR Theory

Molecular Shapes.

VSEPR and Molecular Geometry

Molecular Models and Chemical Bonds - Experiment

Predicting Shapes of Molecules

Deviations from Expected Shape

Chemsheets AS006 (Electron arrangement)

Timberlake LecturePLUS

Molecular Geometries and Bonding Theories

Ch. 6 – Molecular Structure

Valence Shell Electron Pair

Valence Shell Electron Pair Repulsion Theory (VSEPR)

Bellwork Monday Draw the following Lewis dot structures. CCl4 NH4+

Valence shell electron pair repulsion (VSEPR) model:

MOLECULAR GEOMETRY Bonding Unit.

II. Molecular Geometry (p. 183 – 187)

O = O V___________ S________ E________ P______ R____________

Daily Science Draw the Lewis structure for NO2-1 . How many sigma and pi bonds does it have? Draw the Lewis structure for the following and tell how.

Molecular Shape & Geometry

Molecular Structure Molecular Geometry.

Molecular Geometry VSEPR Theory

Molecular Geometry 11/8 Opener:

Chemsheets AS006 (Electron arrangement)

Atoms, Molecules and Compounds

Electron Pair Geometries vs. Shape

Molecular Structure II. Molecular Geometry.

Molecular Geometry.

Unit 9: Covalent Bonding

II. Molecular Geometry (p. 183 – 187)

Unit 9: Covalent Bonding

Bellwork # What is electronegativity?

Valence Shell electron pair repulsion model 3D models

Molecular Shapes VSEPR Model

Molecular Shapes Mrs. Chan.

II. Molecular Geometry (p. 183 – 187)

II. Molecular Geometry (p. 183 – 187)

Valence Shell Electron-pair Repulsion model

Valence Shell Electron Pair Repulsion (VSEPR) Theory

Presentation transcript:

Lab Shapes of Molecules

Lab – Shapes of Molecules Procedure: Determine the central atom (i.e. atom with the most bonding electrons). Draw the Lewis Diagram (Electron Dot). If there exists two central atoms, draw a symmetric molecule. Analyze one central atom to determine the shape of the molecule. Construct the molecule, using the ball and stick model kits provided. Draw a 3-D picture to represent the shape.

# Atoms Bonded around central atom Shapes # Lone Pairs # Atoms Bonded around central atom Name of Shape 1 linear 2 3 trigonal planar 4 tetrahedral trigonal pyramidal angular 5 trigonal bipyramidal 6 octahedral

NI3 . N : . N : : . : . I I : . I : . I 1 3 Trigonal pyramidal Molecular Substance Lewis Diagram For Each Central Atom Name To Represent Predicted Shape Representation For Actual # lone Pairs Around Central atom # atoms bonded to central atom 1 3 Trigonal pyramidal NI3 . N : . N : : . : . I I : . I : . I

Atoms and Bonds Black Carbon Yellow Hydrogen Red Oxygen Colour Atom Black Carbon Yellow Hydrogen Red Oxygen Blue (3 Holes) Nitrogen Orange Halogens (F, Cl, Br, I) Purple Green Single bonds = 1 stick Double bonds = 2 springs Triple bonds = 3 springs