A) When NH3 is added to a saturated solution of AgCl in which undissolved AgCl is present, the reaction that occurs is:
a) AgCl(s) + 2NH3(aq) AgNH2(aq) + NH4Cl(aq)
b) AgCl(s) + 2NH3(aq) Ag(NH 3)2+(aq) + Cl-(aq)
c) AgCl(s) + 4NH3(aq) Ag(NH3)4+ (aq) + Cl- (aq)
d) AgCl(s) + NH3(aq) Ag+(aq) + NH4Cl(aq)
B) Which reaction below is unlikely to occur as an equilibrium in aqueous solution?
a) CuS(s) + 2 H+(aq) Cu2+(aq) + H2S(aq)
b) Ag2O(s) + H2O(l) 2 Ag+(aq) + 2 OH-(aq)
c) BaCO3(s) Ba2+(aq) + CO32-(aq)
d) Na2S(s) 2 Na+(aq) + S2-(aq)