For each of the following reactions, predict whether the equilibrium lies predominantly to the left or to the right. Explain your predictions briefly.

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(a) NH4+(aq) + Br−(aq): (b) HPO4²-(aq) + CH3CO₂ (aq) → PO4³-(aq) + CH₂CO₂H(aq) (c) [Fe(H₂O)]³+ (aq) + HCO3(aq) → [Fe(H₂O), (OH)]2+(aq) + H₂CO3(aq) NH3(aq) + HBr(aq)