Chemistry_1031_day8_020609_actual

Chemistry_1031_day8_020609_actual - General Chemistry I...

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General Chemistry I CHE-1031 Dr. Jonathan M. Smith Friday, February 6
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Today 3.5 – 3.6 Naming Ionic Compounds and Molecular Compounds 3.7 – 3.8 Formula/Molar Mass; Mass %; Mole Ratios Re-Read Ch. 3
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Rare Earth can help…
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Gadolinium Symbol: Gd Atomic Number: 64 Atomic Mass: 157.25 amu Melting Point: 1311.0 °C (1584.15 K, 2391.8 °F) Boiling Point: 3233.0 °C (3506.15 K, 5851.4 °F) Number of Protons/Electrons: 64 Number of Neutrons: 93 Classification: Rare Earth Crystal Structure: Hexagonal Density @ 293 K: 7.895 g/cm 3 Color: Silverish Isotope Half Life Gd-148 75.0 years Gd-150 1800000.0 years Gd-151 124.0 days Gd-152 1.1E11 years Gd-153 241.6 days Gd-154 Stable Gd-155 Stable Gd-156 Stable Gd-157 Stable Gd-158 Stable Gd-159 18.6 hours Gd-160 Stable Gd-162 8.4 minutes Facts Date of Discovery: 1880 Discoverer: Jean de Marignac Name Origin: gadolinite (mineral) Uses: magnetic Obtained From: gadolinite
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Molecules, Compounds, and Chemical Equations Chapter 3
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6 Hydrates hydrates are ionic compounds containing a specific number of waters for each formula unit water of hydration often “driven off” by heating in formula, attached waters follow · CoCl 2 · 6H 2 O in name attached waters indicated by suffix -hydrate after name of ionic compound CoCl 2 ·6H 2 O = cobalt(II) chloride hexahydrate CaSO 4 ·½H 2 O = calcium sulfate hemihydrate Prefix No. of Waters hemi ½ mono 1 di 2 tri 3 tetra 4 penta 5 hexa 6 hepta 7 octa 8 Hydrate oCl 2 · 6H 2 O Anhydrous CoCl 2
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7 Reaction of Acids with Metals H 2 gas
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Tro, Chemistry: A Molecular Approach 8 Acids Contain H +1 cation and anion in aqueous solution Binary acids have H +1 cation and nonmetal anion Oxyacids have H +1 cation and polyatomic anion
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Tro, Chemistry: A Molecular Approach 9 Naming Binary Acids write a hydro prefix follow with the nonmetal name change ending on nonmetal name to –ic write the word acid at the end of the name
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10 Formula Mass
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This note was uploaded on 05/09/2010 for the course CHEM 1031 taught by Professor Thomas during the Spring '06 term at Temple.

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Chemistry_1031_day8_020609_actual - General Chemistry I...

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