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Elements, Compounds, and Molecules http://apchemcyhs.wikispaces.com/Naming+Ionic+Compounds http://wiki.district87.org/index.php/Organic_compounds
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Chapter 8: Lesson 2
Chemical Equations
+Elements, Compounds, and Molecules
+Elements
• Consist of only 1 type of element
• Symbols for the elements are found on the periodic table
+Diatomic Molecules
• Neutral particles in which elements share electrons
Diatomic = “two” atoms• These molecules have
two atoms of the same element.
• Remember: HNOFClBrI• H2, N2, O2, F2, Cl2, Br2, I2
+Compounds
Compounds are composed of 2 or more different atoms.
H2O: water is a covalent compound
NaCl: salt is an ionic compound {Formula Unit}
+Law of Conservation of Mass
Mass Before = Mass After Mass of reactants = Mass of Products
+Word Equations:
Tin + Oxygen Gas Tin Oxide Reactants: “produces”
Product:
+Word Equations:
Tin + Oxygen Gas Tin Oxide Reactants: tin, and oxygen gas “produces”
Product: tin oxide
+
Sodium bicarbonate + acetic acid water + carbon dioxide + sodium
acetate
How many Reactants are there?
Word Equations:Random Selection… be ready!
+
Sodium bicarbonate + acetic acid water + carbon dioxide + sodium
acetate
How many Products are there?
Word Equations:Random Selection… be ready!
+
Sodium bicarbonate + acetic acid water + carbon dioxide + sodium
acetate
Product or Reactant?Acetic acid
Word Equations:Random Selection… be ready!
+
Sodium bicarbonate + acetic acid water + carbon dioxide + sodium
acetate
Product or Reactant?Carbon dioxide
Word Equations:Random Selection… be ready!
+
Sodium bicarbonate + acetic acid water + carbon dioxide + sodium
acetate
Product or Reactant?Water
Word Equations:Random Selection… be ready!
+
Sodium bicarbonate + acetic acid water + carbon dioxide + sodium
acetate
Product or Reactant?Sodium bicarbonate
Word Equations:Random Selection… be ready!
+
Sodium bicarbonate + acetic acid water + carbon dioxide + sodium
acetate
Product or Reactant?Sodium acetate
Word Equations:Random Selection… be ready!
+Stop Here!
+Word Equations: Are they good enough? Tin + Oxygen Gas Tin Oxide
Quick Write: Does this equation prove the Law of Conservation of
Mass? Why or Why Not?
+Chemical Reactions:Whiteboards
+Chemical Reactions:Whiteboards
C + O2 CO2
+Chemical Reactions:Whiteboards
H2O2 H2O + O2
+Chemical Reactions:Whiteboards
CH4 + 2O2 CO2 + 2H2O
+Chemical Reactions:Whiteboards
C + O2 CO2
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