Chemical properties of elemental sulfur Chemical reaction with metallic elements 2A1+3S→A12S3 Fe+S→FeS Hg+S→Hgs Chemical reaction with S+3F,(过量) →SF6 non-metallic elements (H, S+C12△→SC12 O,C,P,halogen) S+02→S02 reacts with oxidizing acid S+2HNO3->H2SO+2NO(g) reacts with base S+2H,S04(浓)→3S02(g+2H20 3S+6NaOH△→2Na2S+Na2SO3+3H20 4S(过量)+6NaOH△2Na2S+Na2S2O3+3H2O 硫代硫酸钠sodium thiosulfate
Chemical properties of elemental sulfur Hg S HgS 2Al 3S Al 2 S3 + + 2 2 2 2 2 6 S O SO S Cl SCl S 3F ( ) SF Δ + + + 过量 S 2H SO ( ) 3SO (g) 2H O S 2HNO H SO 2NO(g) 2 4 2 2 3 2 4 + + + + 浓 4S( ) 6NaOH 2Na S N a S O 3H O 3S 6NaOH 2Na S N a SO 3H O 2 2 2 3 2 2 2 3 2 Δ + + + + + + 过量 • Chemical reaction with metallic elements • Chemical reaction with non-metallic elements (H, O, C, P, halogen ) • reacts with oxidizing acid • reacts with base Fe + S FeS 硫代硫酸钠 sodium thiosulfate
2.Hydrogen sulfide and other sulfides ·Hydrogen sulfide H2S Structure:analogous to that of H2O Properties:H2S is a colorless gas that smells like rotten eggs.H2S is a highly toxic substance.It dissolves to a small extent in water,where it behaves as a biprotic weak acid. H,S is a reducing agent: 0.3002V ERS0:01576VH,s0, 0.4497V 0.144V 0.3478V
2. Hydrogen sulfide and other sulfides H2S is a colorless gas that smells like rotten eggs. H2S is a highly toxic substance. It dissolves to a small extent in water, where it behaves as a biprotic weak acid. • Hydrogen sulfide H2S Structure：analogous to that of H2O Properties： H2S is a reducing agent: H S 0.144V S 0.4497V H SO 0.1576V SO 2 3 2 2- 4 0.3478V 0.3002V EA