Chemistry 35 Wednesday, November 29, 2006

Chemistry 35 Wednesday, November 29, 2006 - Wednesday,...

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Wednesday, November 29, 2006 Chemistry COMPLETE SENTENCES How do you write balanced equations for o Combustion reaction? o Precipitation reaction? Text: Sections 1.4, 9.3, 10.8-10.9 BALANCED CHEMICAL EQUATION 1. Complete sentence that describes a reaction 2. Balanced: equal # of atoms on each side a. (Dalton atoms rearrange) 3. Balancing: number puzzle (trial and error) a. Adjust coefficients i. (don’t change chemical form) b. Usually written with integer coefficient COMBUSTION REACTIONS OF HYDROCARBONS Combustion: burning reaction with O 2 Products: “oxides” of C and H Write a balanced equation with integer coefficients for the combustion of: o butane (C 4 H 10 ) C 4 H 10 + O 2 CO 2 + H 2 O 1 C 4 H 10 + 13/2 O 2 4 CO 2 + 5 H 2 O (X 2) 1 C 4 H 10 + 13 O 2 8 CO 2 + 10 H 2 O o octane (C8H18) C 8 H 18 + O 2 CO 2 + H 2 O 2 C 8 H 18 + 25 O 2 16 CO 2 + 18 H 2 O
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Wednesday, November 29, 2006 PRECIPITATION REACTIONS 1. Full balanced equation: swap anions a. Note which species (aq), (s)
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This note was uploaded on 03/20/2008 for the course CH 101 taught by Professor Bigham during the Fall '08 term at N.C. State.

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Chemistry 35 Wednesday, November 29, 2006 - Wednesday,...

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