Ms. Cook Mrs. Clark-Grubb Mrs. Mansberger Types of Reactions Ms. Cook Mrs. Clark-Grubb Mrs. Mansberger

Type of Reactions Chemical reactions are classified into five general types Synthesis (Combination) Decomposition Single Replacement Double Replacement Combustion

Combination (Synthesis) Two or more elements or simple compounds combine to form (synthesize) one product A + B AB 2Mg + O2 2MgO 2Na + Cl2 2NaCl SO3 + H2O H2SO4

Decomposition One substance is broken down (split) into two or more simpler substances. AB A + B 2HgO 2Hg + O2 2KClO3 2KCl + 3O2

Try this with your partner. . . Classify the following reactions as a) synthesis or b) decomposition: a ___A. H2 + Br2 2HBr ___B. Al2(CO3)3 Al2O3 + 3CO2 ___C. 4 Al + 3C Al4C3 b a

Single Replacement One element takes the place of an element in a reacting compound. A + BX AX + B C + BX BC + X Fe + CuSO4 FeSO4 + Cu I2 + ZnCl2 Znl2 + Cl2

Double Replacement Two elements in different reactants switch places. AX + BY AY + BX AgNO3 + NaCl AgCl + NaNO3 ZnS + 2HCl ZnCl2 + H2S

Try this with your partner. . . Classify the following reactions as a) single replacement b) double replacement __A. 2Al + 3H2SO4 Al2(SO4)3 + 3H2 __B. Na2SO4 + 2AgNO3 Ag2SO4 + 2NaNO3 __C. 3C + Fe2O3 2Fe + 3CO a b a

Combustion A reaction in which a compound (often containing carbon) reacts with oxygen 2Mg + O2 2MgO CH4 + 2O2 CO2 + 2H2O C3H8 + 5O2 3CO2 + 4H2O C6H12O6 + 6O2 6CO2 + 6H2O

Try this with your partner. . . Balance the combustion equation ___C5H12 + ___O2 ___CO2 + ___H2O 8 5 6