Chapter 8 Lesson 2 Chemical Equations Learning Objectives
+ Chapter 8: Lesson 2 Chemical Equations
+ Learning Objectives n. Today’s n SWBAT: Objective: Distinguish among elements, compounds, and molecules.
+ 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 n Diatomic = “two” atoms • These molecules have two atoms of the same element. • Remember: HNOFCl. Br. I • H 2, N 2, O 2, F 2, Cl 2, Br 2, I 2
+ Compounds n Compounds are composed of 2 or more different atoms. n H 2 O: water is a covalent compound n Na. Cl: salt is an ionic compound {Formula Unit}
+ Learning Objective - Preview n Determine how a chemical reaction satisfies the law of conservation of mass.
+ Law of Conservation of Mass n Mass Before = Mass After n Mass of reactants = Mass of Products n Figure 9 page 346
+ Word Equations: n Tin + Oxygen Gas Tin Oxide n Reactants: n “produces” n Product:
+ Word Equations: n Tin + Oxygen Gas Tin Oxide n Reactants: n tin, and oxygen gas “produces” n Product: tin oxide
+ Word Equations: Random Selection… be ready! n Sodium bicarbonate + acetic acid water + carbon dioxide + sodium acetate How many Reactants are there?
+ Word Equations: Random Selection… be ready! n Sodium bicarbonate + acetic acid water + carbon dioxide + sodium acetate How many Products are there?
+ Word Equations: Random Selection… be ready! n Sodium bicarbonate + acetic acid water + carbon dioxide + sodium acetate Product or Reactant? Acetic acid
+ Word Equations: Random Selection… be ready! n Sodium bicarbonate + acetic acid water + carbon dioxide + sodium acetate Product or Reactant? Carbon dioxide
+ Word Equations: Random Selection… be ready! n Sodium bicarbonate + acetic acid water + carbon dioxide + sodium acetate Product or Reactant? Water
+ Word Equations: Random Selection… be ready! n Sodium bicarbonate + acetic acid water + carbon dioxide + sodium acetate Product or Reactant? Sodium bicarbonate
+ Word Equations: Random Selection… be ready! n Sodium bicarbonate + acetic acid water + carbon dioxide + sodium acetate Product or Reactant? Sodium acetate
+ Word Equations: Are they good enough? n Tin + Oxygen Gas Tin Oxide n Quick Write: n Does this equation prove the Law of Conservation of Mass? n Why or Why Not?
+ Chemical Reactions: Whiteboards
+ Chemical Reactions: Whiteboards n. C + O 2 CO 2
+ Chemical Reactions: Whiteboards n H 2 O 2 H 2 O + O 2
+ Chemical Reactions: Whiteboards n. CH 4 + 2 O 2 CO 2 + 2 H 2 O
+ Chemical Reactions: Whiteboards n. C + O 2 CO 2
- Slides: 23