121 5l2u26

Mercury (I) 1.Hg2(NO3)2 + (NH4)2S → Hg↓ + HgS↓ + 2NH4NO3 2. Hg2(NO3)2 + Cu → Cu(NO3)2 + 2Hg↓ 3. Hg2(NO3)2 + 2KI → Hg2I2↓ + 2KNO3 Hg2I2↓+ 2KI → K2[HgI4] + Hg↓ 4. Hg2(NO3)2 + 2NaOH → Hg2O↓ + 2NaNO3 + H2O Hg2O↓ + NaOH → no reaction 5. 2Hg2(NO3)2 + 4NH4OH → HgO ∙ Hg(NH2)(NO3)↓ + 2Hg↓ + 3NH4NO3 + 3H2O 6. Hg2(NO3)2 + 2HCl → Hg2Cl2↓ + 2HNO3 Hg2Cl2↓ + 2NH3 → Hg↓ + Hg(NH2)Cl↓ + NH4Cl 7. Hg2(NO3)2 + Na2CO3 → Hg2CO3↓ + 2NaNO3 Mercury (II) 1. Hg(NO3)2 + (NH4)2S → HgS↓ + 2NH4NO3 2. Hg(NO3)2 + Cu → Cu(NO3)2 + 2Hg↓ 3. Hg(NO3)2 + 2KI → HgI2↓ + 2KNO3 HgI2↓ + 2KI → K2[HgI4] 4. Hg(NO3)2 + 2NaOH → HgO↓ + 2NaNO3 + H2O HgO↓ + NaOH → no reaction

Black precipitate (Svehla,1979, p.200) Dark film of metallic mercury (Soine, 1961, p. 433) Green precipitate (Svehla,1979, p.202) Black precipitate (Svehla,1979, p.202) Black precipitate (Svehla,1979, p.202) Precipitate does not dissolve (Svehla,1979, p.202) Black precipitate (Svehla,1979, p.201)

White precipitate (Svehla,1979, p.200) Precipitate does not dissolve (Svehla,1979, p.200) Yellow precipitate, slowly turns to blackish gray (Svehla,1979, p.202) Black precipitate (Svehla,1979, p.210) Dark film of metallic mercury (Soine, 1961, p. 433) Red precipitate (Svehla,1979, p.210) Precipitate dissolves (Svehla,1979, p.211) Brownish-red to yellow precipitate (Svehla,1979, p.210) Precipitate does not dissolve (Svehla,1979, p.210)

5. 6. 2Hg(NO3)2 + SnCl2 → Hg2Cl2 ↓ + Sn(NO3)4 Hg2Cl2↓ + SnCl2 → 2Hg↓ + SnCl4

White, silky precipitate (Svehla,1979, p.211) Black precipitate (Svehla,1979, p.211)