Classifying Chemical Reactions. 3-25-03Kentlake Science Department2 Synthesis Reactions Occur when two or more substances combine to form one compound.

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Presentation transcript:

Classifying Chemical Reactions

Kentlake Science Department2 Synthesis Reactions Occur when two or more substances combine to form one compound.

Kentlake Science Department3 Synthesis Reactions Elements are joined together. 2H 2 + O 2  2H 2 O A + B  AB

Kentlake Science Department4 Synthesis Reactions Compounds are joined together. 6CO 2 +6H 2 O  C 6 H 12 O 6 + 6O 2

Kentlake Science Department5 Single Displacement Reactions Occur when an uncombined element replaces an element that is part of a compound.

Kentlake Science Department6 Single Displacement Reactions A single element replaces an element in a compound. Zn+ 2HCl  H 2 + ZnCl 2 A + BY  B + AY

Kentlake Science Department7 Decomposition Reaction A complex substance breaks down into two or more simpler substances. 2H 2 O  2H 2 + O 2 AB  A + B

Kentlake Science Department8 Combustion Reactions A hydrocarbon is a compound containing only carbon and hydrogen. When burned they will combine with oxygen.

Kentlake Science Department9 Combustion Reactions The products of combustion are always carbon dioxide and water. CH 4 +2O 2  CO 2 +2H 2 O hydrocarbon + oxygen carbon dioxide + water

Kentlake Science Department10 Double Displacement Reactions An element from each of two compounds switch places.

Kentlake Science Department11 Double Displacement Reactions H 2 SO 4 +2NaOH  Na 2 SO 4 +2H 2 O AX + BY  AY + BX

Kentlake Science Department12 Neutralization Reactions Double displacement reactions that involve the reaction between an acid and base

Kentlake Science Department13 Neutralization Reactions Forms a salt and water. Heat is usually given off in neutralization reactions.

Kentlake Science Department14 Neutralization Reactions Mg(OH) 2 +2HCl  MgCl 2 +2H 2 O base + Acid  salt + water

Kentlake Science Department15 Internet References Balancing Equations