5 Types of Reactions

A + B = AB AB = A + B 5 Common Reaction Types: -synthesis -decomposition -combustion -single displacement -double displacement synthesis - means to make something or build Example: synthetic material, photosynthesis A + B = AB decomposition- means to something down starts out as 1 whole and breaks into 2 or more EX: decomposing (dead) animals or garbage AB = A + B

A(fuel) + O2 = H2O + CO2 C3H8 + 5O2 = 4H2O + 3CO2 5 Common Reaction Types: -synthesis -decomposition -combustion -single displacement -double displacement Combustion-burning always has CO2 as a product A(fuel) + O2 = H2O + CO2 actual example: C3H8 + 5O2 = 4H2O + 3CO2

AB + C = AC + B 2NaCl + Ca = CaCl2 + 2Na 5 Common Reaction Types: -synthesis -decomposition -combustion -single displacement -double displacement single displacment- 1 “switch” one element switches or hops to another partner AB + C = AC + B Cl switches to pair w/ Ca in the product 2NaCl + Ca = CaCl2 + 2Na Like a divorce and a remarriage

AB + XY = AY + BX Na2SO4 + BeO= BeSO4 + Na2O 5 Common Reaction Types: -synthesis -decomposition -combustion -single displacement -double displacement double displacment- 2 “switch” 2 elements switch or change partners AB + XY = AY + BX Na & So4 both switches partners in the product Na2SO4 + BeO= BeSO4 + Na2O

5 Types of Chemical Reactions Guess which common reaction type: 4Fe + 3O2 Fe2O3 2 substances 1 product synthesis

5 Types of Chemical Reactions Examples of synthesis reactions: Synthesis Reaction A skinny bird (reactant) and the worm (reactant) combine to make one product…..one fat bird.

5 Types of Chemical Reactions Examples of synthesis reactions: 1 2 rain water & carbon dioxide in the air carbon monoxide gas & oxygen gas combine to form combine to form carbonic acid carbon dioxide gas

5 Types of Chemical Reactions 5 Common Reaction Types: Guess which common reaction type? reactant -------> product + product decomposition

5 Types of Chemical Reactions Examples of decomposition reactions:                                                                                                                1) water can be broken down into hydrogen gas & oxygen gas 2)To visualize this reaction look at the cartoon: the egg (the reactant), which contained the turtle at one time, now has opened and the turtle (product) and egg shell (product) are now two separate substances.

5 Types of Chemical Reactions Examples of decomposition reactions: Decomposition Reaction Ex: mercury oxide decomposes into mercury and oxygen 2HgO 2Hg + O2

5 Types of Chemical Reactions Guess which common reaction type? Zn + 2HCL ZnCl2 + H2 Single Displacement

5 Types of Chemical Reactions Single Replacement Reaction Cont’d: The chemical equation for this single replacement reaction looks like: reactant + reactant -----> product + product Zn + 2HCL ZnCl2 + H2

Single Replacement To visualize this reaction look at the cartoon: the guy in the orange shirt steals the date of the other guy. So, a part of one of the reactants trades places and is in a different place among the products

5 Types of Chemical Reactions Guess which common reaction type? AgNo3 + NaCl AgCl + NaNo3 double displacement

5 Types of Chemical Reactions 4) Double Displacement (Replacement) Reaction: a reaction in which the elements in two compounds are exchanged parts of two compounds switch places to form two new compounds Two reactants yield two products. they switch partners AX + BY  AY + BX

5 Types of Chemical Reactions Double Displacement (Replacement) Reaction: The chemical equation for double replacement reaction looks like: reactant + reactant -----> product + product EX: silver nitrate combines with sodium two new compounds--silver chloride & sodium nitrate are formed WHY?… because the sodium and silver switched places

5 Types of Chemical Reactions 5 Common Reaction Types: Guess which common reaction type? C7H6O + O2 ---> CO2 + H2O combustion