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Mike
Lv 4
Mike asked in Science & MathematicsChemistry · 1 decade ago

Equilibrium (Kc) Chemistry Question?

For the equilibrium PCl5 (g) <- -> PCl3 (g) + Cl2, Kc = 4.0 at 228 degrees C. If pure PCl5 is placed into a 1.0 L container and allowed to come to equilibrium and the equilibrium concentration of PCl5 (g) is 0.27 M, what is the equilibrium concentration of PCl3?

I CANT figure this out... I don't know the concentration of Cl2 and don't know how to figure this out. I set up the equation: 4.0 = [PCl3][Cl2]/0.27 but don't know where to go from here.

2 Answers

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  • Dr.A
    Lv 7
    1 decade ago
    Favorite Answer

    4.0 = x^2/ 0.27

    x = molar concentration PCl3 = molar concentration Cl2 = 1.0 M

  • ?
    Lv 4
    5 years ago

    what is Kc 6.10 and NH3

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