PPT-Sample Exercise 3.1 Interpreting and Balancing Chemical Equations

Solution a The left box which represents the reactants contains two kinds of molecules those composed of two oxygen atoms O 2 and those composed of one nitrogen atom and one oxygen atom NO The right box which represents the products contains only molecules composed of one nitrogen atom and two oxygen atoms NO. Can’t Create or Lose Atoms. A. B. A. B. A. B. 2A + 2B . . AB. Not Balanced. You must have the same number of each type of atom on each side of an equation.. Balancing Chemical Equations. Can’t Create or Lose Atoms. I can identify the products and reactants in a chemical reaction.. I can state the law of conservation of matter.. I can determine the number of each atom in a compound based on subscripts and coefficients.. symbolic representation of a chemical reaction that shows:. reactants. on left side of reaction. products. on right side of equation. relative amounts of each with . stoichiometric. . coefficients. EQ: How are changes in matter related to changes . in energy?. Changes in Matter. You are at the beach. You built a sandcastle!. You notice storm clouds gathering in the distance.. You are sad : (. You know your sandcastle is about to go bye-bye.. Parts of a chemical equation:. Reactants. : a substance present at the beginning of a chemical reaction. (Left side). Products. : a substance that is produced during a chemical reaction (Right Side). Can’t Create or Lose Atoms. A. B. A. B. A. B. 2A + 2B . . AB. Not Balanced. You must have the same number of each type of atom on each side of an equation.. Balancing Chemical Equations. Can’t Create or Lose Atoms. Element. . . =. . . =. P. O. Balancing Equations. . =. =. P. O. Oxygen. Hydrogen. Water. . Oxygen. Hydrogen. Carbon. Balancing Equations. The mass on each side of. the equation . must be equal. This tutoring session is designed to help anyone who is struggling balancing equations. Remember!. Matter can never be created nor can it be destroyed (Theory of conservation of matter). This means that whatever elements go into a chemical equation (Reactants) must also come out of the chemical equation (Products). . 1. Describing a Chemical Reaction. A chemical reaction = the process by which one or more substances is changed into one or more different substance. s.. Reactants. = the original . substance(s. EQ: How are changes in matter related to changes . in energy?. Changes in Matter. You are at the beach. You built a sandcastle!. You notice storm clouds gathering in the distance.. You are sad : (. You know your sandcastle is about to go bye-bye.. 10.1 . Reactions and . Equations. Evidence of Chemical Reactions. ..  . The process of which the atoms of one or more substances are rearranged to form different substances is called a . Chemical Reaction. Chapter Objectives. Describe the chemical processes used in biomass production and conversion to biofuels.. Explain balancing a chemical reaction as an application of the . law of conservation of mass. Chemistry 1-2. Mr. . Chumbley. Section 1: Describing Chemical Reactions. Chemical Reactions. A . chemical reaction . is a process by which one or more substances change to produce one or more different substances. Chemical . Formulas. Chemical formula . - A shorthand notation for a compound or diatomic element.. Shows the elements and how many atoms of each element are in the compound/molecule.. C. 6 . H. 12. O.