which of the following reactions proceeds to the left when equal concentrations of reactants and products are mixed?
a. HCl4(aq)+H2O(l) equilibrium H3O+(aq)+ClO4-(aq)
b. HSO4-(aq)+HCO3-(aq) equilibrium SO4 2-(aq)+H2CO3(aq)
c. HF(aq)+Cl-(aq) equilibrium HCl(aq)+F-(aq)
d. H3O+(aq)+CH3CO2-(aq) equilibrium H2O(l) CH3CO2(aq)