tommy

At a particular temperature, K = 3.75 for the following reaction.
SO2(g) + NO2(g) SO3(g) + NO(g)
If all four gases had initial concentrations of 0.870 M, calculate the equilibrium concentrations of the gases.

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  1. First you must determine Q in order to know which way the reaction will move.
    Qrxn = (NO)(SO3)/(SO2)(NO2) = 1.00 so the reaction will move to the right.
    ............SO2 + NO2 ==> SO3 + NO
    initial....0.870.0.870..0.870..0.870
    change.....-x.....-x.....x.....x
    equil.....0.870-x etc.

    Substitute from the ICE chart above into K expression and solve for x, then evaluate the concns of each gas.

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