posted by Allan .
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
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