Chemistry question below?

Question

Hello!
I have an unknown compound of simple salt that contains one cation and one anion. Possible cations include silver, lead, bismuth, tin, aluminum, zinc and antimony. Possible anions include chloride, bromide, Iodine, sulfate, sulfide, sulfite, nitrate, phosphate, and colbalt. I try to dissolve the unknown compound into the following solution.

In H2O: insoluble even with stirring and heating
In HCl: insoluble after stirring and heating
In HNO3: soluble after stirring and heating
In NaOH: soluble after upon adding into 6 M NaOH
IN NH3: soluble after adding, and complete soluble after stir and wait.

I think it's silver chloride. Any idea?

Answer 1

AgCl fits - except for the NaOH. AgCl is not soluble in NaOH. You want an amphoteric metal for that - Al, Zn or Pb.
But then you want one of those also to be soluble in NH3, which narrows it down to Zn.
So you should be looking for an insoluble zinc salt from the list.