Notes Sept 5 2013 Module 3 Chemical Reactions 1 2 3 4 5 6 7 8 9 Chemical equations Balancing chemical equations Intro to chemical equilibrium Aqueous solutions Precipitation reactions Acids and bases Gas forming reactions Oxidation reduction reactions Classifying reactions in aqueous solution On the test Ch 1 2 3 1 3 2 3 3 Look at end of chapter s look at notes videos video slides go back and do hw Videos are summaries from the book 20ish questions 75 minutes Format Multiple choice fill in the blank Location 6th floor of chemistry building ConcepTest For this reaction that describes a steelmaking process a Fe2O3 s b C s c Fe s d CO2 g which coefficients represent the balanced equation A a 2 b 3 c 3 d 3 B a 2 b 3 c 4 d 3 C a 2 b 3 c 4 d 1 5 D a 1 b 3 c 2 d 3 E none of these are correct Do the single elements or diatomic elements last ConcepTest For the reaction in the image what went wrong P4 s 6 Cl2 g 2 PCl3 l A O2 interfered causing the P4 to burn B Chlorine interfered burning with O2 in air C Nothing the reaction gives off heat and light D Nothing the reaction gave off enough heat to ignite E none of these are correct ConcepTest For this reaction that describes a steelmaking process 2 Fe2O3 s 3 C s 4 Fe s 3 CO2 g what percentage of the mass of the products escapes to the atmosphere A 75 B 43 C 59 D 37 E none of these are close Reactions Law of Conservation of Matter Matter not created or destroyed Balanced chemical equations Formulated by Antoine Lavoisier in 1789 ConcepTest This reaction describes the formation of ammonia 3 H2 g N2 g 2 NH3 g At equilibrium which are true i Three H2 and one N2 are required to form each NH3 ii Some H2 and N2 still exists as those molecules iii some NH3 is reverting back to H2 and N2 A i ii iii B i iii C ii iii Equillibrium Reaction has a double headed arrow D i ii