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Chemical Reactions

Chemical Reactions. BY: Daniel Joffe Mike Genovese. What is a Chemical Reaction?. The changing of substances to other substances by the breaking of old bonds and the formation of new bonds. Examples of Chem. Reactions.

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Chemical Reactions

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  1. Chemical Reactions BY: Daniel Joffe Mike Genovese

  2. What is a Chemical Reaction? The changing of substances to other substances by the breaking of old bonds and the formation of new bonds.

  3. Examples of Chem. Reactions • 1. Digesting Food- http://digestive.niddk.nih.gov/ddiseases/pubs/yrdd/ • 2. Photosynthesis- http://biology.clc.uc.edu/courses/bio104/photosyn.htm • 3. Rust-http://www.corrosionist.com/What_chemical_reaction_is_rust.htm

  4. Reactants and ProductsYIELD!!!!!!!!!! Reactant+ Reactant Product A chemical reaction breaks new bonds and creates new bonds The substances going into the reactants. The new thing that forms from the reaction is called a product This is spoken as, “____ reacts with ____ to produce ____”

  5. John Dalton’s Atomic Theory - All matter is made of atoms - In a chemical reaction the atoms are joined together in different ways. - As products are produced, bonds that hold the atoms together are broken. - New bonds are formed.

  6. John Dalton’s Atomic Theory Law of Conservation of Mass • Matter itself can never created or destroyed. • “Matter, though divisible in an extreme degree, is nevertheless not infinitely divisible. That is, there must be some point beyond which we cannot go in the division of matter. ... I have chosen the word “atom” to signify these ultimate particles.” – John Dalton

  7. Word Equations • Elements and Compounds can be reactants • Compounds are the products • Reactants to products formulas are written as… • ____ + ____ ____ + ____

  8. Word Equations Examples • Iron + oxygen Iron(III) oxide • Hydrogen peroxide Water + Oxygen

  9. Question 1 • Chemical reactions create and break down… • A. Proton Orbitals • B. Chemical Nuclei • C. Chemical Bonds • D. None of the above

  10. Question 2 • The arrow pointing from the reactants to the products is said as_______ when speaking a reaction formula? • A. Stop • B. Yield • C. Form • D. Joined

  11. Homework! Write a word equation for the following chemical reaction… Water is formed by an explosive reaction between oxygen and hydrogen.

  12. Extra Practice • Textbook pages 175-177 • PQP’S #33-34 on page 202

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