CHEM 1201 Notes February 29
CHEM 1201 Notes February 29 CHEM 1201
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This 2 page Class Notes was uploaded by Kelsie Carter on Thursday March 17, 2016. The Class Notes belongs to CHEM 1201 at University of Colorado Colorado Springs taught by Kristi Follett in Winter 2016. Since its upload, it has received 10 views. For similar materials see in Chemistry at University of Colorado Colorado Springs.
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Date Created: 03/17/16
Chapter 5 Notes I. physical vs chemical changes A. physical: composition remains the same, change of state B. chemical: new substance is formed C. chemical reactions: involve chemical changes, atoms are rearranged II. chemical reactions- use formulas and symbols to represent chemical reaction “recipe” A. reactants on the left side of the equation, “ingredients” B. products on the right side of the equation, “cake” C. arrows separates reactants from products D. reactants must equal your products = balanced equation E. to balance an equation: 1.each individual compound must be written correctly before balancing 2. coefficients are used (numbers in front of the compound/element) 3. number of atoms of each element must be the same on both sides 4. coefficients must be in the lowest terms 5. watch out for diatomic elements BrINClHOF 6. practice F. symbols used= table 5.1 III. types of reactions A. combination/composition/synthesis: 2 or more elements or simple compounds to form one product A+B AB B. decomposition reaction: compound splits into two or more simple elements AB A+B C. single replacement: one element replaces another in a compound A+BC B+AC D. double replacement: two compounds reacting, negative and positive ions switch places AB+CD AD+CB E. combustion: carbon and hydrogen react on the presence of oxygen, producing carbon dioxide and water IV. oxidation reactions: reduction reactions (redox) A. oxidation- loss of electrons; reducing agent B. reduction- gain electrons; oxidizing agent C. LEO GER D. remember metals typically loose eletrons and nonmetals gain electrons E. cations (+) tend to gain electrons F. anions (-) loose electons G. elemental form is neutral
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