[tex]Zn+S\rightarrow ZnS[/tex]

[tex]ZnS+2HCl\rightarrow ZnCl_2+H_2S\uparrow[/tex]

[tex]ZnCl_2+2AgNO_3\rightarrow Zn(NO_3)_2+2AgCl\downarrow[/tex]

[tex]Zn(NO_3)_2+2KOH\rightarrow Zn(OH)_2\downarrow+2KNO_3[/tex]