5 Types of Reactions 1. Synthesis 2. Decomposition 3. Single Replacement 4. Combustion 5. Double Replacement

A + B  AB “The Marriage” 2 H2 + O2  2 H2O 1. Synthesis only 1 product A + B  AB 2 H2 + O2  2 H2O

AB  A + B “The Break-Up” H2O2  H2O + O2 2. Decomposition only 1 reactant H2O2  H2O + O2

1 element replaces another element 3. Single Replacement 1 element replaces another element “The Kickout” A + BX  AX + B Demo Demo – Mg + HCl in test tube Mg + 2 HCl  MgCl2 + H2

_____ > _____ > _____ 3. Single Replacement Activity Series of Metals more active metals will replace less active metals Demo Cu(s) + 2 Ag+(aq)  Cu2+(aq) + 2 Ag(s) K + CuCl  KCl + Cu Demo – AgNO3 and Cu wire in test tube Li + KCl  LiCl + K Cu + LiCl  no rxn Li K Cu _____ > _____ > _____

CxHy+O2  CO2+H2O “Burnin” C3H8 + 5 O2  3 CO2 + 4 H2O 4. Combustion burning a hydrocarbon (CxHy) in O2 always forms CO2 and H2O CxHy+O2  CO2+H2O C3H8 + 5 O2  3 CO2 + 4 H2O

1–4 Redox Synthesis A0 + B0 → A+B– Single Replacement A0 + B+X– → A+X – + B0 2H2 + O2  2H2O Zn + 2HCl  ZnCl2 + H2 Decomposition A+B – → A0 + B0 Combustion CxHy + O2 → CO2 + H2O – + +4 –2 + –2 H2O2  H2 + O2 CH4 + 2O2  CO2 + 2H2O

two compounds “switch ions” NOT REDOX 5. Double Replacement “Switchin’ Partners” two compounds “switch ions” AX + BY  AY + BX Demo Demo – Pb(NO3)2 + KI  PbI2 in test tube 2 KI + Pb(NO3)2  2 KNO3 + PbI2

Quick Quiz! 1. Which type of reaction is described by the following equation? 6 Li + N2  2 Li3N A. synthesis B. decomposition C. single-replacement D. combustion REDOX?

Quick Quiz. Mg + 2 HNO3  Mg(NO3)2 + H2 2. Which type of reaction is described by the following equation? Mg + 2 HNO3  Mg(NO3)2 + H2 A. synthesis B. decomposition C. single-replacement D. double-replacement REDOX?

Quick Quiz. 2 C2H5OH + 7 O2  4 CO2 + 6 H2O 3. Which type of reaction is described by the following equation? 2 C2H5OH + 7 O2  4 CO2 + 6 H2O A. double-replacement B. decomposition C. single-replacement D. combustion REDOX?

Quick Quiz. Pb(NO3)2 + 2 NaCl  PbCl2 + 2 NaNO3 4. Which type of reaction is described by the following equation? Pb(NO3)2 + 2 NaCl  PbCl2 + 2 NaNO3 A. synthesis B. decomposition C. double-replacement D. single-replacement REDOX?

Quick Quiz. 5. Balance the equation and describe it as a combination or decomposition reaction. H2SO4  H2O2 + SO2 A. H2SO4  H2O2 + SO2 combination B. H2SO4  H2O2 + SO2 decomposition C. H2SO4  2H2O2 + SO2 combination D. H2SO4  2H2O2 + SO2 decomposition REDOX?