14chemicalequations

14chemicalequations - Chemical Equations Glenn V. Lo...

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    Chemical Equations Glenn V. Lo Department of Physical Sciences Nicholls State University
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    What’s a chemical equation? A symbolic representation for a chemical  change. Example: electrolysis of water 2 H 2 O(l)   2 H 2 (g) + O 2 (g) Reactant: H 2 O Products: H 2 , O 2 Coefficients: 2, 2, and 1 Physical states: (l)=liquid, (g)=gas Other physical states: (s)=solid,  (aq)=“aqueous” or dissolved in water
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    Parts of a chemical equation? Consider the following chemcial equation  for the  reaction of baking soda with hydrochloric  NaHCO 3 (s) + HCl(aq)   NaCl(aq) + H 2 O(l) + CO 2 (g) What are the reactants?  What are the products?  What are the coefficients? What do (s), (aq), (l), and (g) mean?
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    Interpreting Coefficients Coefficients keep track of the number of  atoms involved in the reaction. Coefficients should be consistent with 
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14chemicalequations - Chemical Equations Glenn V. Lo...

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