Types of Chemical Reactions 8.2

Types of Reactions Synthesis Decomposition Combustion Single Displacement Double Displacement

Synthesis Reactions Synthesis – (also called a ___________ reaction) a rxn in which 2 or _____ substances _______ to form a new cmpd General form: A + B  AB 2 small  1 _____ Ca + Cl 2  CaCl 2

Decomposition Reaction Decomposition – a rxn in which a ______ cmpd breaks down to ____ two or more _______ substances General form: AB  A + B 2H 2 O (l)  2H 2 (g) + O 2 (g) Above eqn uses __________ to work in the _______ direction.

Combustion Reactions Combustion = the _________ reaction of an _______ cmpd, in which ____ is released General form: Fuel + O 2  H 2 O + CO 2 + E Fuel is a hydrocarbon, C n H n

Single Displacement Reactions Single Displacement reaction – chemical rxn in which one _______ replaces another _______ in a compound that is in ________ General form of s.d. = A + BC  AC + B Need to use ________ Series

Activity Series Activity Series – a list of elements organized _________ to the ease with which the elements _______ certain chemical _________. 2Al (s) +3CuCl 2(aq)  2AlCl 3(aq) +3Cu (s)

Activity Series The more _______ an element reacts w/other substances, the _______ its activity. An element from _____ can displace another _____ it but not vice versa The farther ____ the more likely the top will ______ the bottom.

Double Displacement Reactions Double displacement reaction – a rxn in which a gas, a solid ppt, or molecular cmpd forms from the apparent ________ of atoms or ions b/t 2 _________ General form: AB + CD  AD + CB

Double Displacement 2KI (aq) +Pb(NO 3 ) 2(aq)  PbI 2(s) + 2KNO 3(aq) K and Pb have ________ places Cations will displace _______ only!!!!

Double Displacement More accurately written as ___ _____ equations Net ionic equation – equation that includes ____ those cmpds. and ions that are ________ in a chemical ______ in a rxn.

Double Displacement 2K + (aq) + 2I - (aq) + Pb 2+ (aq) + 2NO 3 - (aq)  PbI 2(s) + 2K + (aq) + 2NO 3 - (aq) NIE= Pb 2+ (aq) + 2I - (aq)  PbI 2(s) Ions that were _______ are: Spectator ions – ions that remained _________ in a chemical rxn.