1. TYPES OF CHEMICAL REACTIONS SNC2P

2. Chemical Reactions A chemical reactions is when one or more substances _________________________________ There are several ways to represent chemical reactions: ▫ _____ Equations ▫ ________ Equations ▫ _________ Equations All chemical equations are written: ____________  ______________ reacts and changes into new substances Word Skeleton Chemical Products Reactants

3. Chemical Reactions a)Word Equation ▫ Words only, shows the ____________ __ b)Skeleton Equation ▫ Shows the chemical formulas, but ____________________ chemical names Lead (II) + Potassium  Lead (II) + Potassium nitrate iodide iodide nitrate there are no coefficients Pb(NO) 3 + KI  PbI 2 + KNO 3

4. Chemical Reactions c) Chemical Equation ▫ Shows the chemical formulas, _________________________ has coefficients and the states Pb(NO 3 ) 2 (aq) + 2KI (aq)  PbI 2 (s) + 2 KNO 3 (aq)

5. Chemical Reactions Most chemical reactions can be classified as one of the following: 1._____ displacement 2.______ displacement 3.Combustion 4.________ 5.Decomposition Single Double Synthesis

6. Types of Chemical Reactions Video http://www.youtube.com/watch?v =tE4668aarck

7. Single Displacement Reactions In a single displacement reactions, a free element displaces another element from a compound A __________________displaces a less active element from its compounds The general equation for this reactions is: Fe (s) + CuSO 4 (aq)  FeSO 4 (aq) + Cu (s) more active element A + BC  AC + B

8. About Single Displacement Reactions They involve ______________ _________ can displace one another ________ can displace one another To determine which metals will displace each other, we can use an activity series: ionic compounds The metals Halogens Can displace everything in the series Will not displace anything in the series

9. Double Displacement Reactions Anions (-) and Cations (+) of two different molecules ___________ forming ___ entirely different compounds The general equation for this reactions is: 2KI (aq) + Pb(NO 3 ) 2 (aq)  PbI 2 (s) + KNO 3 (aq) switch places AB + CD  AD + CB two

10. Double Displacement Reactions All double-displacement reactions have two major features in common: 1.Two compounds ________ ions (or elements) to form two new compounds 2.One of the products is either -A compound that will ________ from the reaction mixture in some way (as a ___________) OR -A stable covalent compound such as______ exchange separate solid or a gas water