108B - Observations 1 2 3 4 5 6 7 8 9 10 Solution of K2CrO4...

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Observations Solution of K2CrO4 (yellow) Solution of K2CrO7 (orange) 1 stays yellow becomes yellow 2 becomes orange stays orange 3 becomes yellow becomes yellow 4 becomes orange becomes orange 5 forms a yellow preciptate 6 no precipitate 7 precipitate dissolves and becomes orange 8 forms a yellow precipitate 9 large amount of yellow precipitate formed small amount of yellow precipitate formed 10 CH3COOH becomes orange stays orange H2SO4 becomes orange stays orange KOH stays yellow becomes yellow NH3 stays yellow becomes yellow Ca(OH)2 stays yellow becomes very pale C2H5OH no change no change A reaction is in equilibrium once the concentrations of the reactants and the products cease to change in a closed system over time. A state of equilibrium is also achieved when the concentrations of the reactants become equal to the concentrations of the products or when the forward rate of the reaction equals the reverse rate of the reaction. In Parts I and II of the experiment, Le Chatelier’s principle was observed with how the
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This note was uploaded on 04/12/2011 for the course CHEM 1A taught by Professor Nitsche during the Spring '08 term at University of California, Berkeley.

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108B - Observations 1 2 3 4 5 6 7 8 9 10 Solution of K2CrO4...

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