Chemistry

1.5 mole of PCl5 are heated at constant temperature in a closed vessel of 4 litres capacity.At the equilibrium,PCl5 is 35percent dissociated into PCl3 and Cl2.calculate the equilibrium constant.

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  1. (PCl5) = 1.5 mols/4 L = 0.375 M.
    0.375 M x 0.35 = 0.131 M
    .......PCl5 ==> PCl3 + Cl2
    I....0.375.......0......0
    C.....-x.........x......x
    E...0.375-x......x......x

    Kc = (PCl3)(Cl2)/(PCl5)
    You know x is 0.131 M. Substitute and solve for Kc.
    Post your work if you get stuck.

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  2. Hey solve completely

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