BAỉI TAP VE NHOM, CROM, KEếM 1. 4 3 4 3 o t Al C Al C + 2. ( ) 4 3 2 4 4 2 4 3 6 3 2Al C H SO CH Al SO+ + 3. ( ) ( ) 2 4 ựa du 2 4 3 3 6 2 3 v Al SO NaOH Al OH Na SO + + 4. 5. ( ) 2 2 3 2NaAlO H O NaOH Al OH + + 6. 3 2 2 6 2 3Al HCl AlCl H + + 7. ( ) 3 3 2 4 3 3 3 3AlCl NH H O Al OH NH Cl + + + 8. ( ) 2 3 2 3 2 3 o t Al OH Al O H O + 9. 2 3 2 2 2 2Al O NaOH NaAlO H O + + 10. 2 3 2 3 o t Al S Al S + 11. ( ) 2 3 2 2 3 6 2 3Al S H O Al OH H S + + 12. ( ) ( ) ( ) 2 2 3 2 2 2 4Al OH Ba OH Ba AlO H O + + 13. ( ) ( ) 2 2 2 2 2 2 2 3Al Ba OH H O Ba AlO H + + + 14. 2 2 3 3 2 2 o t Al O Al O + 15. 3 6 2 3 2 3 2 2 dpnc Na AlF Al O Al O + 16. ( ) ( ) 2 3 2 2 2 2 Al O Ba OH Ba AlO H O + + 17. 2 2 2 2 2 2 2 3Al NaOH H O NaAlO H + + + 18. 3 6 2 3 2 3 2 2 dpnc Na AlF Al O Al O → + 19. ( ) ( ) 2 2 2 2 2 2 2 3Al Ca OH H O Ca AlO H+ + → + ↑ 20. ( ) ( ) 2 2 2 2 3 2 2 2Ca AlO HCl H O Al OH CaCl + + → ↓ + 21. ( ) 3 2 3 3 3Al OH HCl AlCl H O + → + 22. ( ) 3 3 3 3 3 3AlCl AgNO Al NO AgCl + → + ↓ 23. 3 2 3 2 2 3Mg AlCl Al MgCl + → + 24. 2 2 2 o t Zn O ZnO + → Hoaëc 2 2 o t Zn H O ZnO H + → + ↑ 25. 2 2 2 ZnO NaOH Na ZnO H O+ → + 26. ( ) 2 2 ùa du 2 2 2 v Na ZnO HCl Zn OH NaCl + → ↓ + 27. 28. ( ) ( ) ( ) 3 3 2 4 2 4Zn OH NH Zn NH OH   + →   29. 2 2 2 2Zn NaOH Na ZnO H+ → + ↑ 30. ( ) ( ) 4 3 2 2 4 2 4 2Zn NH OH Zn NH OH H H O   + → + ↑ +   31. 2 2 3 4 3 2 o t Cr O Cr O+ → 32. 2 3 2 2 2 2Cr O NaOH NaCrO H O + → + 33. ( ) 2 2 2 3 3 2NaCrO CO H O Cr OH NaHCO + + → ↓ + 34. 35. ( ) 2 3 2 3 2 3 o t Cr OH Cr O H O → + 36. 2 3 2 3 2 2 o t Cr O Al Al O Cr+ → + 37. ( ) 3 2 3 3 3Cr OH HCl CrCl H O + → + 38. 2 3 2 3 2 o t Cr Cl CrCl+ →