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Chemical Reactions

Chemical Reactions. Michelangelo La Mattina. What is chemical reaction?. Chemical reaction tells you the substances present before and after the reactions. Reactants – substances that undergo change Products – new substances formed as a result of that change

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Chemical Reactions

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  1. Chemical Reactions Michelangelo La Mattina

  2. What is chemical reaction? • Chemical reaction tells you the substances present before and after the reactions. • Reactants – substances that undergo change • Products – new substances formed as a result of that change • The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction. • Should be balanced because the masses are equal, law conservation of mass

  3. Chemical Equation • Reactants  Products • Ex. • C + O  CO2 • Carbon + Oxygen  Carbon Dioxide • Chemical Equation is a representation of a chemical reaction in which the reactants and products are expressed as formulas. • The way it is read – “Carbon and oxygen react and form carbon dioxide” or “The reaction of carbon and oxygen yields carbon dioxide.

  4. Classifying Reactions • Synthesis Reactions • Decomposition Reactions • Single Displacement • Double Displacement

  5. Synthesis reactions • Reaction in which two or more substances react to form a single substance • Ex. A + B  AB • 2Na + Cl2 2NaCl • Eggs + Brownie mixture + water + oil Brownies

  6. Decomposition • Opposite of Synthesis reaction • Compound breaks down into two or more simpler substances • AB  A + B • Ex. 2H2O  2H2 + O2 • Candle  Wick + Wax

  7. Single Displacement • Reaction in which one element takes the place of another element in a compound • A + BC  B + AC • Ex. Cu + 2AgNO3  2Ag + Cu(NO3)2 • Pepperoni + Cheese pizza  Cheese + Pepperoni Pizza

  8. Double Displacement • Two different compounds exchange positive ions and form two new compounds • AB + CD  AD + CB • Ex. Pb(NO3)2 + 2KI  PbI2 + 2KNO3 • French fries and ketchup + Hamburger and soda  French fries and soda  Hamburger and Ketchup

  9. Where I Got My Info Science Textbook Pages 192 - 204

  10. Song In PowerPoint • Howard Jones - And Do You Feel Scared

  11. BACKGROUNDS CITED • httpyorkcountyschools.orgteachersjchristmanchemistry.jpg • httpwww.flickr.comphotostheshyfox299678392sizeso

  12. The End

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