lecture24%28chapt8%29 - Finish Chapter 8 Types of Chemical...

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1 Finish Chapter 8 Types of Chemical Reactions: Combination Reactions – Metal + nonmetal salt – Metal OR nonmetal + O 2 ____ oxide – Metal oxide + water metal hydroxide – Metal oxide + water metal hydroxide Decomposition Reactions Replacement Reactions – Single or double
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2 Types of Chemical Reactions: Decomposition Reactions • C 6 H 12 O 6 + 6O 2 CO 2 + 6H 2 O + energy Decomposition AB A + B A compound or substance separate into two or more substances which may or may not be different from each other, but the products are usually different from the original compound. Reverse of Combination Reactions Some examples of decomposition reactions are: 2 H 2 O(l) 2 H 2 + O 2 electrolysis of water 2 HgO(s) 2 Hg(l) + O 2 (g) generation of oxygen from heating HgO 2 KClO 3 (s) 2 KCl(s) + 3 O 2 (g) another way to produce oxygen CH 3 COOH CH 4 + CO 2
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3 Note however, the following reactions are often called ionization or dissociation reactions rather than decomposition reaction. The solvent participates in these reactions. NaCl(s) + 6 H 2 O Na + (H 2 O) 6 + Cl - NH 4 Cl(s) NH 4 + (aq) + Cl - HNO 2 H + (aq) + NO 2 - (aq) Some decomposition reactions are Disproportion Reactions . For example, 3 Cl 2 (g) + 6 OH - (aq) 5 Cl - + ClO 3 - (aq) + 3 H 2 O(l) 4 KClO 3 (s) KCl(s) + 3 KClO 4 (s) Types of Chemical Reactions: Combination Reactions A+B
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