21-3-4锡、铅的硫化物 SnS(棕) SnS2(黄) PbS(黑)PbS2 均不溶于稀盐酸 •配位溶解（浓HC) SnS 4HCI->H2SnCla H2S PbS 4HCI -H2PbCla H2S SnS2+6HCI-H2SnCl6 +2H2S 21-3-4.锡、铅的硫化物 SnS(棕) SnS2 (黄) PbS(黑) SnS + 4HCl → H2SnCl4 + H2S PbS + 4HCl → H2PbCl4 + H2S SnS2 + 6HCl → H2SnCl6 +2H2S PbS2 •均不溶于稀盐酸 •配位溶解(浓HCl)