Chapter 6 Notes - Chapter 6 Chemical Reactions I Evidence of chemical reactions A A chemical reaction often times gives visual clues 1 Color change 2

Chapter 6 Notes - Chapter 6 Chemical Reactions I Evidence...

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Chapter 6: Chemical Reactions I. Evidence of chemical reactions A. A chemical reaction often times gives visual clues 1. Color change 2. Solid forms (precipitate) 3. Bubbles form (gas) 4. Temp. change 5. Light/glow II. Chemical equations A. Chemical change is a chemical reaction represented by a chemical equation 1. Ex: 1 CH 4 (g) + 2 O 2 (g) Arrow 1 CO 2 (g) + 2 H 2 O (g) B. Reactants 1. Written left of arrow 2. Chemicals before they change C. Products 1. Written to right of arrow 2. Chemicals after reaction D. Arrow means yield/produces E. Physical states of matter are indicated by
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Unformatted text preview: 1. (s)=solid 2. (l)=liquid 3. (g)=gas 4. (aq)=aqueous (ions dissolved in water) F. Catalysts are shown above arrow 1. Ex: heat, enzyme, light, change in temp., acids, etc. III. Balancing equations A. Law of Conservation of mass--no atoms gained or lost during a reaction 1. Same # of atom types on both sides 2. Can change coefficients but not subscribes 3. If there is a lone element you can use fractions then multiply it back to whole numbers 4. Balance hydrogen and then oxygen last...
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