1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive...

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1 Molecular Polarity

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Transcript of 1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive...

Page 1: 1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The.

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Molecular Polarity

Page 2: 1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The.

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Polar Molecules

Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The molecule contains a dipole.

Physical properties depend on the polarity of a molecule.

Page 3: 1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The.

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Polarity of a Covalent Bond

Electronegativity (EN) values are used to predict the polarity of covalent bonds. The greater EN, the more polar will be the bond. A polar bond has a dipole or slight separation of charge (from the unequal sharing of bond electrons).

Page 4: 1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The.

Polarity of a Molecule

The polarity of a molecule depends on the sum of all the bond dipoles (individual dipoles or vectors). If there is a net dipole for the molecule, than the molecule is polar. A molecule that has polar bonds may or may not be polar.

Page 5: 1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The.

Polarity of a Binary Molecule In binary molecules, the molecule

polarity simply corresponds to the bond polarity.

Page 6: 1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The.

Molecules with Non-polar Bonds

For example, dihydrogen molecule (H2) has a non-polar bond and thus is non-polar itself - the charge distribution is uniform across the molecule

Page 7: 1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The.

Molecules with Polar Bonds On the other hand, hydrogen fluoride (HF)

contains a polar bond and so it is a polar molecule. HF molecule has a concentration of negative charge (or greater electron density) near the fluoride (F) end of the molecule. The hydrogen end of the molecule has a concentration of a positive charge (or lower electron density). This reflects the fact that F atom is more electronegative than H atom.

Page 8: 1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The.

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C OO

Molecular Geometryand Polarity

.. ..

H HO

+

Netdipole

In molecules containing more than two atoms, the shape or geometry of the molecule impacts the polarity.

Dipoles can cancel each other out resulting in nonpolar molecules.No Net dipole

Page 9: 1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The.

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In general, a molecule is polarpolar if:

it is asymmetrical (isn’t a basic VSEPR shape) Ex:Ex: H2O, bent (polar)(polar) NH3, pyramidal (polar)(polar)

or if the terminal atoms/groups in a basic VSEPR shape differ.

Ex:Ex: CH2Cl2, tetrahedral (polar)(polar)

Molecular Geometryand Polarity

Page 10: 1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The.

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Symmetrical Molecules

Molecules that exhibit symmetry in the distribution of electrons would have no net dipole. These molecules are considered non polar.

Non polarNon polarVSEPR shape

identical atoms

Page 11: 1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The.

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Symmetrical Molecules

Page 12: 1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The.

Asymmetrical Molecules

Molecules that exhibit asymmetry in the distribution of electrons will result in a net dipole. These molecules are considered polar.

Page 13: 1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The.

Asymmetrical Molecules

Page 14: 1 Molecular Polarity. 2 Polar Molecules Polar molecules are molecules that have a slightly positive end or pole and a slightly negative end or pole. The.

Let’s Review


Water Molecules Chapter 15 and 16 - tvgreen.com 15.pdf · Polar Molecules Molecules with ends ... ①The molecule must contain polar bonds ... The attraction of one water molecule

Water Molecules Chapter 15 and 16 - tvgreen.com 15.pdf · Polar Molecules Molecules with ends ... ①The molecule must contain polar bonds ... The attraction of one water molecule

The Science of Water in the Living World. Water is a polar molecule. Polar Molecule: a molecule that has a slightly positive side and a slightly negative.

The Science of Water in the Living World. Water is a polar molecule. Polar Molecule: a molecule that has a slightly positive side and a slightly negative.

Chapter 2 polar molecules

Chapter 2 polar molecules

1) Properties of Water Water is a polar covalent solvent Oxygen end is slightly negative Hydrogen ends are slightly positive.

1) Properties of Water Water is a polar covalent solvent Oxygen end is slightly negative Hydrogen ends are slightly positive.

New frontiers for quantum gases of polar molecules - JILA · rates and pathways. b, Polar molecules are ideal candidates for realizing novel quantum many-body systems and for encoding

New frontiers for quantum gases of polar molecules - JILA · rates and pathways. b, Polar molecules are ideal candidates for realizing novel quantum many-body systems and for encoding

Bonds Dipole-Dipole Covalent - Physics & Astronomyphysics.gsu.edu › thoms › molecules.pdf · 2006-02-02 · - one polar and one non-polar atoms/molecules - two non-polar atoms/molecules

Bonds Dipole-Dipole Covalent - Physics & Astronomyphysics.gsu.edu › thoms › molecules.pdf · 2006-02-02 · - one polar and one non-polar atoms/molecules - two non-polar atoms/molecules

Making Everyday Chemsitry Public Project - chem.ku.edu · Since soap molecules have both properties of non-polar and polar molecules, the soap acts as an emulsifier, or something

Making Everyday Chemsitry Public Project - chem.ku.edu · Since soap molecules have both properties of non-polar and polar molecules, the soap acts as an emulsifier, or something

Solubility of Polar and Non-Polar Aromatic Molecules in ...

Solubility of Polar and Non-Polar Aromatic Molecules in ...

NOTES: 8.4 Polar Bonds and Molecules

NOTES: 8.4 Polar Bonds and Molecules

1 POLARITY POLAR BONDS Bonds between atoms POLAR MOLECULES Polarity between molecules Occurs when polar bonds create a dipole moment.

1 POLARITY POLAR BONDS Bonds between atoms POLAR MOLECULES Polarity between molecules Occurs when polar bonds create a dipole moment.

Biochemistry Chapter 3. Water polar compound one end is slightly negative while the other is slightly positive polar compound one end is slightly.

Biochemistry Chapter 3. Water polar compound one end is slightly negative while the other is slightly positive polar compound one end is slightly.

Lecture 8.4b- Polar Molecules

Lecture 8.4b- Polar Molecules

Biologically Important Molecules. I.Water Biologically Important Molecules I.Water A. Structure - polar covalent bonds.

Biologically Important Molecules. I.Water Biologically Important Molecules I.Water A. Structure - polar covalent bonds.

Do now: H N H H · 2019. 9. 13. · Polarity of molecules As well as describing bonds as polar or non-polar we can describe molecules as polar or non-polar. This is called polarity.

Do now: H N H H · 2019. 9. 13. · Polarity of molecules As well as describing bonds as polar or non-polar we can describe molecules as polar or non-polar. This is called polarity.

Polar Bonds and Molecules 97-03

Polar Bonds and Molecules 97-03

MOLECULAR SHAPES · MOLECULAR SHAPES! Linear Trigonal planar Tetrahedral Bent Pyramidal Symmetrical shapes Polar bonds Non-polar molecules Unsymmetrical shapes Polar bonds Polar molecules

MOLECULAR SHAPES · MOLECULAR SHAPES! Linear Trigonal planar Tetrahedral Bent Pyramidal Symmetrical shapes Polar bonds Non-polar molecules Unsymmetrical shapes Polar bonds Polar molecules

Polar Molecules H F electron rich region electron poor region

Polar Molecules H F electron rich region electron poor region

1 Cell Molecules continuo... 2 Water has a variety of unusual properties because of attractions between its polar molecules. The slightly negative regions.

1 Cell Molecules continuo... 2 Water has a variety of unusual properties because of attractions between its polar molecules. The slightly negative regions.

Electronegativity, Polar Bonds, and Polar Molecules Thursday February 23 rd, 2006 .

Electronegativity, Polar Bonds, and Polar Molecules Thursday February 23 rd, 2006 .

Cold Guided Beams of Polar Molecules - Max Planck Society

Cold Guided Beams of Polar Molecules - Max Planck Society