Chapter 3: Reactions Grade 11 University Chemistry Mr. Song Feb. 28. 2013

Question to Start off Reactions What do you think Chemists do? Question to Start off Reactions

Answers

Exmaple: Photochromic Lenses Glasses that turn dark when they see sunlight Embedded with microcrystal silver (I) chlorides: ____________ Lenses darkening is due to _________. Lenses will begin to clear as soon as they are away from the UV light. Exmaple: Photochromic Lenses

In order for Scientists to do this, we need to know the basic building blocks. Different types of reactions. Photochromic Lenses

Chemical reactions are grouped based on different reactions that occur. By classifying reactions, we are able to predict the final outcome of the reaction. 5 Main types of Chemical reaction! Chemical reactions are grouped based on different reactions that occur. By classifying reactions, we are able to predict the final outcome of the reaction. 5 Main types of Chemical reaction! Types of Reactions

Homework Concept map of how everything ties in together Remember your grade 10 knowledge Homework

Is Mass Gained or Lost During a Chemical Reaction? YouTube Video: http://www.youtube.com/watch?v=J5hM1D xaPLw What happened to the mass? Was it conserved through out the experiment? Is mass conserved in other chemical reactions as well? What goes in, must come back out one way or the other. Is Mass Gained or Lost During a Chemical Reaction?

Camp Fire? Water? (gas, solid, liquid) Examples?

Antoine Lavoisier Father of modern Chemistry Named oxygen and hydrogen back in late 1700 Helped construct the Metric system Trapped all the reactants and products. Including Gas. Law of conservation of Mass. Antoine Lavoisier

Law of Conservation of Mass? In any given chemical reaction, the total mass of the _________ equal the total mass of the _________. States that mass is neither created nor destroyed in any chemical reaction. 2KNO3 (aq) + PbI2 (s) Pb(NO3)2(aq) 2KI(aq) 158.2 g 158.2 g Law of Conservation of Mass?

Balancing Equations ___Mg + ___ O2  ___MgO ___ Al + ____O2  ___ Al2O3 Balancing Equations

Class Work: Balancing Equations Blackline Master 6.5c Class Work: Balancing Equations

Synthesis General definition of Synthesis: Two or more simple reactants combine to make ONE larger or more complex product. A + B  AB 8 Fe + S8 ---> 8 FeS Synthesis

Decomposition General definition of Decomposition: One large compound is broken into TWO or more compounds or elements AB  A + B 2 H2O ---> 2 H2 + O2 Decomposition

Combustion General definition of Combustion Involves burning of a hydrocarbon in the presence of Oxygen 2 types of combustion Complete Incomplete C10H8 + 12 O2 ---> 10 CO2 + 4 H2O Combustion

Complete vs Incomplete CxHy (s)/(l)/(g) + O2(g)  CO2(g) + H2O(l)/(g) + Energy CxHy(s)/(l)/(g) + O2(g)  CO2(g) + H2O(l)/(g) + CO(g) + C(s) + Complete vs Incomplete

Homework Concept map of how everything ties in together Remember your grade 10 knowledge Homework