5 Types of Chemical Reactions 2-15-11 Matching Cards Graphic Organizer Worksheet

5 types of chemical equations Why do we categorize? To break large groups down into smaller groups to make them easier to understand To make differences and similarities more clear

Type 1: SYNTHESIS Definition: Two or more reactants combine to form one product Key sign: One product General Structure: A + B  C Examples: #4: CO + O2  CO3 #2: SO2 + O2  SO4

Type 2: DECOMPOSITION Definition: One reactant breaks down into two or more products Key sign: One reactant General Structure: A  B + C Examples: #5: H2CO3  CO2 + H2O #10: NCl3  N2 + Cl2

Type 3: SINGLE REPLACEMENT Definition: A single element replaces another element in a compound Key sign: One single element and a compound on both sides of the equation General Structure: AB + C  AC + B Examples: #13: H2SO4 + Ca  CaSO4 + H2 #14: Li + H2O  LiOH + H2

Type 4: DOUBLE REPLACEMENT Definition: Two ions replace each other to form two different compounds Key sign: Two compounds on both sides of the equation General Structure: AB + CD  AD + CB Examples: #3: CaCl2 + K3PO4  Ca3(PO4)2 + KCl #17: Al(SO4)3 + Ca(OH)2  Al(OH)3 + CaSO4

Type 5: COMBUSTION Definition: A chemical burns in oxygen to product light/heat Key sign: Oxygen is a reactant, carbon dioxide and water are products (or vice versa) General Structure: A + O2  CO2 + H2O Examples: #16: C10H22 + O2  CO2 + H2O #19: CH4 + O2  CO2 + H2O

Categories (15 min) Organize the 19 chemical equations into the FIVE types with your partners # of products # of reactants Elements vs. compounds Similar reactants and products On one separate sheet of paper with all of your group members names on it, write down the equations in your five groups

Classifying Reactions Copy down the following reactions on a SEPARATE sheet of paper and then classify the type of reaction and explain your answer. C3H8 + O2  CO2 + H2O FeCl3 + NaOH  Fe(OH)3 + NaCl Ag2O  Ag + O2 K + MgBr2  KBr + Mg H2 + O2  H2O NaCl + F2  NaF + Cl2