Chapter 8: Lesson 2 Chemical Equations.

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Presentation transcript:

Chapter 8: Lesson 2 Chemical Equations

Elements, Compounds, and Molecules http://apchemcyhs.wikispaces.com/Naming+Ionic+Compounds http://wiki.district87.org/index.php/Organic_compounds

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} http://www.elmhurst.edu/~chm/vchembook/images/103co.GIF http://compoundsforkids.wordpress.com/reaserch-paper/ http://ian.umces.edu/imagelibrary/displayimage-6463.html

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

Word Equations: Random Selection… be ready! 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

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  What does this symbol mean?

Chemical Reactions: Whiteboards C + O2  CO2 Write down the reactants…

Chemical Reactions: Whiteboards H2O2  H2O + O2 Write down the products

Chemical Reactions: Whiteboards CH4 + 2O2  CO2 + 2H2O Write down the products

Chemical Reactions: Whiteboards C + O2  CO2 Write down the reactants