Types of Reactions OxidationReduction Reactions Chemical reactions are

Chemical reactions are classified into four general types l Combination l Decomposition l Single

Two or more elements or simple compounds combine to form (synthesize) one product A

One substance is broken down (split) into two or more simpler substances. AB A

Classify the following reactions as 1) combination or 2) decomposition: ___A. H 2 +

One element takes the place of an element in a reacting compound. A +

Two elements in reactants take the place of each other AB + CD AD

Classify the following reactions as 1) single replacement 2) double replacement __A. 2 Al

A reaction in which a compound (often carbon) reacts with oxygen C + O

Balance the combustion equation ___C 5 H 12 + ___O 2 ___CO 2 +

OXIDATION AND REDUCTION Reactions that involve a loss or gain of electrons ¨ Occurs

REQUIREMENTS FOR OXIDIZATIONREDUCTION l Electrons are transferred l Two processes occur Oxidation = Loss

Combine the oxidation and reduction reactions to make Loss of electrons = Gain of

Identify the following as an 1) oxidation or a reduction process: __A. Sn Sn

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Types of Reactions Oxidation-Reduction Reactions

Chemical reactions are classified into four general types l Combination l Decomposition l Single Replacement l Double Replacement

Two or more elements or simple compounds combine to form (synthesize) one product A + B AB 2 Mg + O 2 2 Mg. O 2 Na + Cl 2 2 Na. Cl SO 3 + H 2 O H 2 SO 4

One substance is broken down (split) into two or more simpler substances. AB A + B 2 Hg. O 2 Hg + O 2 2 KCl. O 3 2 KCl + 3 O 2

Classify the following reactions as 1) combination or 2) decomposition: ___A. H 2 + Br 2 2 HBr ___B. Al 2(CO 3)3 Al 2 O 3 + 3 CO 2 ___C. 4 Al + 3 C Al 4 C 3

One element takes the place of an element in a reacting compound. A + BC Zn + 2 HCl Fe + Cu. SO 4 AB + C Zn. Cl 2 + H 2 Fe. SO 4 + Cu

Two elements in reactants take the place of each other AB + CD AD + CB Ag. NO 3 + Na. Cl Ag. Cl + Na. NO 3 Zn. S Zn. Cl 2 + H 2 S + 2 HCl

Classify the following reactions as 1) single replacement 2) double replacement __A. 2 Al + 3 H 2 SO 4 Al 2(SO 4)3 + 3 H 2 __B. Na 2 SO 4 + 2 Ag. NO 3 Ag 2 SO 4 + 2 Na. NO 3 __C. 3 C + Fe 2 O 3 2 Fe + 3 CO

A reaction in which a compound (often carbon) reacts with oxygen C + O 2 CH 4 + 2 O 2 CO 2 + 2 H 2 O C 3 H 8 + 5 O 2 3 CO 2 + 4 H 2 O C 6 H 12 O 6 + 6 O 2 6 CO 2 + 6 H 2 O

Balance the combustion equation ___C 5 H 12 + ___O 2 ___CO 2 + ___H 2 O

OXIDATION AND REDUCTION Reactions that involve a loss or gain of electrons ¨ Occurs in many of the 4 types of reactions and combustion ¨ Important in food metabolism, batteries, rusting of metals ¨

REQUIREMENTS FOR OXIDIZATIONREDUCTION l Electrons are transferred l Two processes occur Oxidation = Loss of electrons (LEO) Zn Zn 2+ + 2 e- Reduction = Gain of electrons (GER) Cu 2+ + 2 e. Cu

Combine the oxidation and reduction reactions to make Loss of electrons = Gain of electrons Zn + Cu 2+ + 2 e. Zn + Cu 2+ Zn 2+ + 2 e- + Cu Zn 2+ + Cu

Identify the following as an 1) oxidation or a reduction process: __A. Sn Sn 4+ + 4 e- __B. Fe 3+ + 1 e- Fe 2+ __C. Cl 2 + 2 e- 2 Cl-