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Chemistry 1 Chapter 5

by: Courtney Beckwood

Chemistry 1 Chapter 5 CHEM 1110 - 02

Marketplace > University of Memphis > CHEM 1110 - 02 > Chemistry 1 Chapter 5
Courtney Beckwood
University of Memphis

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These are the notes for Chapter 5 of Chemistry 1, which covers Molecules and Compounds
General Chemistry I Lecture
Henry Kurtz
Class Notes
Chemistry, Courtney Beckwood, memphis
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This 5 page Class Notes was uploaded by Courtney Beckwood on Saturday February 20, 2016. The Class Notes belongs to CHEM 1110 - 02 at University of Memphis taught by Henry Kurtz in Spring 2016. Since its upload, it has received 30 views.

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Date Created: 02/20/16
Chapter 5 Type of Bonds and Representations: Types of Bonds: o Ionic (between metal and nonmetal ions) o Covalent (shared) bonds Representations (Ex: Hydrogen Peroxide): o Empirical formula HO o Molecular formula H 2 2 o Structural Formula H-O-O-H  Valence Electrons: Outer shell electrons of an atom that participate in chemical bonding o o NOTICE HOW WHEN YOU GO DOWN THE ROW, THEY ARE THE EXACT SAME (EXCEPT HELIUM)!! The Ionic Bond:  Ionic Bond: electrostatic force that holds ions together in an ionic compound Electrostatic (Lattice) Energy:  Lattice energy (U): energy required to completely separate one mole of a solid ionic compound into gaseous ions o Monatomic Anions:  Nonmetals with metals – nonmetal often gains electrons – anion  Name is element stem with –ide ions o Ex: Oxide ion, Nitride ion, Chloride ion Binary Ionic Compounds:  Formula Unit: NaCl or CaCl 2  Name: Elements and –ide on anion o Sodium chloride; calcium chloride o Al2O3– aluminum oxide o FeCl2– iron(II) chloride  Must be neutral Polyatomic Ions:  Learn common ones on Table 5.5  Oxides: 2- o Sulfate anion (SO 4 o Carbonate anion (CO ) 32-  Add Hydrogens: o HPO 42-: Hydrogen Phosphate o H2PO 4 Dihydrogen Phosphate Hydrates:  Hydrate is an ionic compound in which the formula unit includes a fixed number of water molecules o Ex: MgCO 5H O or CuSO 5H O 3 2 4 2 o  Covalent Bond: chemical bond in which two or more electrons are shared by two atoms o Single Bond: two atoms share one pair of electrons o Double Bond: two atoms share two pairs of electrons o Triple Bond: two atoms share three pairs of electrons  Formulas and Names of Binary Molecular Compounds:  The name consists of two words, one for each element in the compound. o First word ------> name of element that appears first o Second word -------> altered version of the name of the second element: stem + -ide  Ex: Oxygen ----> oxide  Names are further modified by adding prefixes to denote the numbers of atoms in the molecule o CO ----> carbon monoxide o N 2 5----> dinitrogen pentoxide o CO 2----> carbon dioxide o Masses:  Molecular Mass: sum of the masses of the atoms represented in the molecular formula o Ex: N2O 5----> dinitrogen pentoxide o 2(mass of N) + 5(mass of O)  Formula Mass: sum of the masses of the atoms or ions in a formula unit o Ex: Mg(NO )3 2 o (mass of Mg) + 2(mass of N) + 6(Mass of O) Amount:  Mole o Amount of substance that contains as many elementary entities as there are atoms in exactly 12 g of carbon – 12 o Avogadro’s number  NA= 6.02214199 x 10 23mol -1  Molar Mass o Mass of 1 mole of a substance o 1 mol Mg(NO )3 2148.3148 g o Mass Percent  Chemical Formulas:  Mass percent: The proportion of each constituent element in grams of that element per 100 g of the compound  YOU CAN FIND THE NUMBER OF GRAMS BY LOOKING AT THE PERIODIC TABLE!! o Mass Percent  Chemical Formulas: Elemental Analysis:  


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