In your testing, several precipitates are formed, and then dissolved as complexes. Select three correct balanced equations below where these complex ion forms.
Zn(OH)2(s) + 4NH3(aq) --> Zn(NH3)43+(aq) + 2OH-(aq)
Zn (s) + 2 OH-(aq)--> Zn(OH)4-(aq)
Zn(OH)2 + 2H+(aq)--> Zn2+(aq) + 2 H20(l)
Al(OH)3(s) + OH-(aq) -->Al(OH)4- (aq)
AgCl(s) + 2 NH3(aq)--> Ag(NH3)2+(aq) + Cl-(aq)
Cu(OH)3(s) + 4 NH3(aq)--> Cu(NH3)42+(aq) + 2 (OH)-(aq)