In the reaction, PCl3 + Cl2 ------> PCl5 the concentration of the reactants at equilibrium were each determined to be 7.2 mol/L, and the product at 0.050 mol/L.
Calculate the equilibrium constant (rounding to 2 significant figures and using scientific notation), and state in which direction the equilibrium lies.
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I don't understand your problem. This is just a case of substituting the numbers into the Keq expression and calculating K.
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