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CHEMISTRY FOR ENGINEERS
Learning Module 4
FORCES OF ATTRACTION AND NAMING INORGANIC COMPOUNDS
Pre Test:
1
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It includes strong
intramolecular interactions such as covalent bonds and ionic bonds and weak
intermolecular forces such as dipole-dipole interactions, the London dispersion forces,
and hydrogen bonding
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A chemical bond is a force of
attraction between atoms or ions
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In a covalent bond, two atoms share one or more electrons
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Define intramolecular forces and intermolecular forces
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Intermolecular forces on the
other hand refer to the interaction within two or more molecules
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3
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These are dipole-dipole forces,
ion-dipole forces, dispersion forces, and hydrogen bonds
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A dipole is a molecule that has both positive and negative regions
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It is a force between an ion and a dipole
molecule
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The London dispersion force is the weakest intermolecular force
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The hydrogen bond is one of the
strongest intermolecular attractions, but weaker than a covalent or an ionic bond
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Compare covalent from ionic bond, what makes them unique?
Covalent bonds and ionic bonds are two main types of chemical bonding
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In Ionic
bonds, valence electron(s) is transferred between atoms
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An ionic bond is between a metal and a
nonmetal, and a covalent bond is between 2 nonmetals
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If the difference is
between 0
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3: the bond is nonpolar covalent
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4-1
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9): the bond is polar covalent
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7 (or
above 2
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5
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Bases are chemical compounds
that, in solution, are soapy to the touch and turn red vegetable dyes blue
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If the number of hydrogen has decreased that substance
is the acid (donates hydrogen ions)
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Self-evaluation: Using the template below, draw and write a caption about the
following: dipole-dipole forces, ion-dipole forces, dispersion forces, and hydrogen
bonds
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I
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MgBr2
2
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TiBr3
4
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SnSe2
Chemical Name
6
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diboron tetrahydride
8
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phosphorus pentafluoride
10
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Acids and Bases
Chemical Formula
1
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HNO3
3
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HI
5
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Sulfuric acid
7
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Hydrosulfuric acid
9
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Hydrofluoric acid

Chemical Name
Potassium Hydroxide
Nitric Acid
Iron(II) hydroxide
Hydrogen iodide
Aluminum Hydroxide
Chemical Formula
H2SO4
Ba(OH)2
H2SO4
Fe(OH)3

HCl



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