When a reaction is at equilibrium, what two things are equal?
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The rates of the forward and reverse reactions.
What does the value (the number) of Keq tell you?
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If Keq > 1, the forward reaction is favored. If Keq = 1, neither reaction is favored. If Keq < 1, the reverse reaction is favored.
Write a balanced equation for the synthesis of ammonia from its elements, including the word “energy” as a product:
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N2 + 3H2 →2NH3 + energy
Write the Keq expression for the reaction above:
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For the reaction, 2SO3 ↔ 2SO2 + O2, [SO3]=0.37M, [SO2]=0.25M, [O2]=0.86M. Write the Keq equation, calculate Keq, and explain what this value means.
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For the equilibrium system PCl5 ↔ PCl3 + Cl2, Keq = 35. If the concentrations of PCl5 and PCl3 are 0.025M and 0.68M respectively, what is the concentration of the Cl2?
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