Instructional Objective:1.Learn different types of reaction

Five Types of chemical reactions

Synthesis reaction Decomposition reaction Single replacement (Single

displacement) Double replacement (Double

displacement) Combustion reaction

To visualize a synthesis reaction look at the following cartoon:

                                                    

In the cartoon, the skinny bird (reactant) and the worm (reactant) combine to make one product, a fat bird.

Synthesis reaction Also known as composition reaction Always going to be one product Basic form: A  +  X  →    AX EX. MgO(s)  +   H2O(l)  →    Mg(OH)2(s) EX. 2P(s)  +  3Cl2(g)  →    2PCl3(g)

To visualize a decomposition reaction look at the following cartoon:

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In this 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.

Decomposition reaction A single compound breaks down into

simpler compounds. Always going to be one reactant. Basic form: AX  →   A  +  X EX. 2H2O(l)  →    2H2(g)  +  O2(g) EX. 2NaCl(l)  →    2Na(s)  +  Cl2(g)

Notice, 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.

Single replacement Always going to an element and a

compound. Basic form: A  +  BX  →    AX  +  B  EX. Fe(s)  +  CuSO4(aq)  →    FeSO4(aq)  +  Cu(s) (Metal

replace the metal)  AX  +  Y  →    AY + X EX. Cl2(g)  +  2NaBr(aq)  →    2NaCl(aq)  +  Br2(l) (nonmetal

replaces the nonmetal only)

To visualize a double replacement reaction look at the following cartoon:

Double replacement reaction occurrs between ions in aqueous solution . occurrs between two compounds. Always produce a precipitate (solid) ,a gas orwater *Basic form: AX  +  BY  →    AY  +  BX EX. NaCl (aq)  +  AgNO3(aq)  →   NaNO3(aq)  +  AgCl(s) EX. HCl(aq)  +  FeS(s)  →    FeCl2(aq)  +  H2S(g)

EX. HCl(aq)  +  NaOH(aq)  →    NaCl(aq)  +  H2O(l)

Wood as well as many common items that combust are organic (i.e., they are made up of carbon, hydrogen and oxygen). When organic molecules combust the reaction products are carbon dioxide and water (as well as heat).

Combustion reaction hydrocarbon is react with oxygen. Always produce carbondioxide and

water . Always produce heat, light or sound EX. CH4(g)  +  2O2(g)  →    CO2(g)  +  2H2O(g) EX. 2C4H10(g)  +  13O2(g)  →    8CO2(g)  +  10H2O(g)