Reactions & Reaction Types Rxn = Reaction

Chemical Reaction Process that changes chemical substances into different substances. Atoms are rearranged in a chemical reaction

2H2 + O2 2H2O Chemical Reaction Produces Makes Yields Forms Reactants Products Reactants

5 MAIN TYPES OF CHEM RXNS

Synthesis (combination) Definition Variable example Two elements combine to form one compound A+BAB Synthesis (combination) Example Prom analogy One single guy and one single girl arrive at prom. They end up getting together at prom Hydrogen reacts with oxygen to form water 2H2+O22H2O + 

A compound breaks down into smaller forms Definition Variable example A compound breaks down into smaller forms ABA+B Decomposition Example Prom analogy +  A couple arrives at prom, they get into a fight and break up. They stay alone for the rest of the night. 2KClO3 2KCl + 3O2 Potassium Chlorate when heated decomposes to Potassium Chloride and Oxygen

A+BYAY+B Single displacement + 2Na+CuCl22NaCl+Cu  Definition Variable example An element displaces (replaces) part of a compound- only if it is more reactive A+BYAY+B Single displacement Example Prom analogy 2Na+CuCl22NaCl+Cu Sodium reacts with Copper (II) Chloride to produce Sodium Chloride and solid Copper (sodium is more reactive than copper) +  A single guy and a couple are at prom. Since the single guy is hotter (more reactive), the girl leaves her guy to be with the new guy becoming a new couple.

AX+BYAY+BX Double displacement +  Na2SO4+Ba(NO3)2NaNO3+BaSO4 Definition Variable example The elements of compounds displace (replace) each other in the compounds) AX+BYAY+BX Double displacement Example Prom analogy Na2SO4+Ba(NO3)2NaNO3+BaSO4 Sodium Sulfate reacts with Barium Nitrate to produce a solution of Sodium Nitrate and insoluble Barium Sulfate +  Two couples arrive at prom. They each fight and end up trading partners.

The burning of a substance in oxygen (usually a hydrocarbon) Definition Variable example The burning of a substance in oxygen (usually a hydrocarbon) CxHy+O2CO2 +H2O Combustion Example Picture Methane burning to produce carbon dioxide and water CH4+ 2O2CO2+2H2O