Chemistry 10th Edition

Published by Brooks/Cole Publishing Co.
ISBN 10: 1133610668
ISBN 13: 978-1-13361-066-3

Chapter 17 - Chemical Equilibrium - Exercises - Calculation of K - Page 702: 26

Answer

$K_c = 0.10$

Work Step by Step

1. Write the equilibrium constant expression: - The exponent of each concentration is equal to its balance coefficient. $K_c = \frac{[Products]}{[Reactants]} = \frac{[ PCl_5 ]}{[ PCl_3 ][ Cl_2 ]}$ 2. Substitute the values and calculate the constant value: $K_c = \frac{( 12.0 )}{( 10.0 )( 9.0 )} = 0.13$
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