Chemistry

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An equilibrium that would favour the products is
A. NH4+(aq) + H2PO4-(aq)= NH3(aq) + H3PO4(aq)
B. HCN(aq) + HS-(aq)= CN-(aq) + H2S(aq)
C. HCO3-(aq) +,HBO3 2-(aq)= H2BO3-(aq) + CO3 2-(aq)
D. HSO4-(aq) + HSO3-(aq)= H2SO3(aq) + SO4 2- (aq)

The answer is C. But I don't understand why.
Any help would be greatly appreciated

  • Chemistry -

    You need to calculate the equilibrium constant K, which for C would be

    ([H2BO3-]*[CO3 2-]) / ([HCO3-]*[HBO3 2-])

    Look up the equilibrium concentrations [] of the various compounds, and solve. If K > 1, products are favored. If K is less than 1, than reactants are favored

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