Cân bằng các phương trình hóa học:
1. H2+Br2\(\rightarrow\)HBr
2.Na2S+HNO3\(\rightarrow\)NaNO3+H2S
3.Ca+H2O\(\rightarrow\)Ca(OH)2+H2
4.Ca(NO3)2\(\rightarrow\)Ca(NO2)2+O2
5.Fe+Cl2\(\rightarrow\)FeCl3
6.FeCl2+Cl2\(\rightarrow\)FeCl3
7.SO3+H2O\(\rightarrow\)H2SO4
8.Al2O3+HCl\(\rightarrow\)AlCl3+H2O
9.CO2+KOH\(\rightarrow\)K2CO3
10.Ba+H2O\(\rightarrow\)Ba(OH)2+H2
11.CaCO3+CO2+H2O\(\rightarrow\)Ca(HCO3)2
1) H2 + Br2 \(\underrightarrow{to}\) 2HBr
2) Na2S + 2HNO3 → 2NaNO3 + H2S
3) Ca + 2H2O → Ca(OH)2 + H2
4) Ca(NO3)2 \(\underrightarrow{to}\) Ca(NO2)2 + O2
5) 2Fe + 3Cl2 \(\underrightarrow{to}\) 2FeCl3
6) 2FeCl2 + Cl2 \(\underrightarrow{to}\) 2FeCl3
7) SO3 + H2O → H2SO4
8) Al2O3 + 6HCl → 2AlCl3 + 3H2O
9) CO2 + 2KOH → K2CO3 + H2O
10) Ba + 2H2O → Ba(OH)2 + H2
11) CaCO3 + CO2 + H2O → Ca(HCO3)2
1. H2+Br2➝2HBr
2. Na2S+2HNO3➝2NaNO3+H2S
3 .Ca+H2O➝Ca(OH)2
4. Ca(NO3)2➝Ca(NO2)2+O2
5. 2Fe+3Cl2➝2FeCl3
6. 2FeCl2+Cl2➝2FeCl3
7. SO3+H2O➝H2SO4
8. Al2O3+6HCl➝2AlCl3+3H2O
9. CO2+2KOH➝K2CO3+H2O (PT này trên đó bạn thiếu H2O)
10. Ba+H2O➝Ba(OH)+H2
11. CaCO3+CO2+H2O➝Ca(HCO3)2
