Ch. 7 Notes Day 3 4/20/16

Objectives SWBAT explain the difference between different reaction types SWBAT identify the differences and relationships between synthesis and decomposition

Types of Chemical Reactions You can predict the outcome of a reaction if you know what type it is. We will be covering 5 types in physical science. The type of reaction can also be used to determine whether it will “suck in energy” (ENDOthermic) or release energy (EXOthermic). PS. I hope you folks are up on your celebrity couples.

Reaction Types Kanye Kim Kimye Ben Synthesis- two or more substances combine to form a new SINGLE substance A + B  AB Examples 2Na + Cl2  2NaCl 2H2 + O2  2H2O Kim Kardashian + Kanye West  Kimye Decomposition- a single substance decomposes (breaks down) into two or more simpler substances. AB  A + B CaCO3  CaO + CO2 2H2O  2H2 + O2 Bennifer  Ben Affleck + Jennifer Lopez Kanye Kimye Kim Bennifer Ben Jennifer

Reaction Types Single Displacement- when a more reactive single element takes the place of another in a compound A + BC  AC + B Examples Cu + 2Ag(NO3)  2Ag + Cu(NO3)2 2K + 2H2O  H2 + 2KOH

Reaction Types Double Displacement- when two compounds exchange positive ions to make two new compounds AD + BC  AC + BD Examples Pb(NO3)2 + 2KI  PbI2 + 2K(NO3) Ca(CO3) + 2HCl  CaCl2 + H2(CO3)

Reaction Types Combustion- when a carbon compound reacts with oxygen to produce carbon dioxide and water. Carbon Compound + O2  CO2 + H2O Examples CH4 + 2O2  CO2 + 2H2O 2C8H18 + 25O2  16CO2 + 18H2O

QUIZ Write down each equation, and identify what type of reaction it is: MgO  Mg + O2 FeCl3 + NH4OH  Fe(OH)3 + NH4Cl C2H3 + O2  H2O + CO2 Al + O2  Al2O3 Donald + Bill(Melinda)  Bill + Donald(Melinda)