| Хром 1. FeO.Cr2O3 + C = 2. Cr2O3 + Al = 3. Cr + HCl = 4. Сr + O2 = 5. Cr2O3 + NaOH = 6. Cr3+ + OH- = 7. Cr(OH)3 + H+ = 8. Cr(OH)3 + OH- = 9. K3[Cr(OH) 6] + Br2 + KOH = 10. Cr2O3 + O2 + KOH = 11. K2CrO4 + H2SO4 = 12. K2Cr2O7 + KOH = 13. K2Cr2O7 + H2SO4(конц.) = 14. CrO3 + H2O = 15. CrO3 =t 16. K2Cr2O7 + HCl = | 17. K2Cr2O7 + Na2SO3 + H2SO4 = 18.(NH4)2Cr2O7 =t Молібден, вольфрам 1. (Е = Мо,W) 2. MoS2 + O2 = 3. MoO3 + H2 = 4. WO3 + H2 = 5. Е + O2 + KOH =t 6. Е + C = 7. Е + O2 = 8. ЕO3 + NaOH = 9. Na2ЕO4 + HNO3 = 10. H2ЕO4 = t 11. (NH4)2ЕO4 =t 12. H2ЕO4 + NaOH = 13. H2ЕO4 + HCl = |