Chemistry
Balance the following equations:
(a) Fe + H2O ⟶ Fe3O4 + H2
(b) Ca + N2 ⟶ Ca3N2
(c) Zn + KOH ⟶ K2ZnO2 + H2
(d) Fe2O3 + CO ⟶ Fe + CO2
(e) PbO + NH3 ⟶ Pb + H2O + N2
(f) Pb3O4 ⟶ PbO + O2
(g) PbS + O2 ⟶ PbO + SO2
(h) S + H2SO4 ⟶ SO2 + H2O
(i) S + HNO3 ⟶ H2SO4 + NO2 + H2O
(j) MnO2 + HCl ⟶ MnCl2 + H2O + Cl2
(k) C + H2SO4 ⟶ CO2 + H2O + SO2
(l) KOH + Cl2 ⟶ KCl + KClO + H2O
(m) NO2 + H2O ⟶ HNO2 + HNO3
(n) Pb3O4 + HCl ⟶ PbCl2 + H2O + Cl2
(o) H2O + Cl2 ⟶ HCl + O2
(p) NaHCO3 ⟶ Na2CO3 + H2O + CO2
(q) HNO3 + H2S ⟶ NO2 + H2O + S
(r) P + HNO3 ⟶ NO2 + H2O + H3PO4
(s) Zn + HNO3 ⟶ Zn(NO3)2 + H2O + NO2
Answer
(a) 3Fe + 4H2O ⟶ Fe3O4 + 4H2
(b) 3Ca + N2 ⟶ Ca3N2
(c) Zn + 2KOH ⟶ K2ZnO2 + H2
(d) Fe2O3 + 3CO ⟶ 2Fe + 3CO2
(e) 3PbO + 2NH3 ⟶ 3Pb + 3H2O + N2
(f) 2Pb3O4 ⟶ 6PbO + O2
(g) 2PbS + 3O2 ⟶ 2PbO + 2SO2
(h) S + 2H2SO4 ⟶ 3SO2 + 2H2O
(i) S + 6HNO3 ⟶ H2SO4 + 6NO2 + 2H2O
(j) MnO2 + 4HCl ⟶ MnCl2 + 2H2O + Cl2
(k) C + 2H2SO4 ⟶ CO2 + 2H2O + 2SO2
(l) 2KOH + Cl2 ⟶ KCl + KClO + H2O
(m) 2NO2 + H2O ⟶ HNO2 + HNO3
(n) Pb3O4 + 8HCl ⟶ 3PbCl2 + 4H2O + Cl2
(o) 2H2O + 2Cl2 ⟶ 4HCl + O2
(p) 2NaHCO3 ⟶ Na2CO3 + H2O + CO2
(q) 2HNO3 + H2S ⟶ 2NO2 + 2H2O + S
(r) P + 5HNO3 ⟶ 5NO2 + H2O + H3PO4
(s) Zn + 4HNO3 ⟶ Zn(NO3)2 + 2H2O + 2NO2
Related Questions
What is the limitation of the reaction given in question 2?
Write chemical equations for the following word equations and balance them.
(a) Carbon + Oxygen ⟶ Carbon dioxide
(b) Nitrogen + Oxygen ⟶ Nitrogen monoxide
(c) Calcium + Nitrogen ⟶ Calcium nitride
(d) Calcium oxide + Carbon dioxide ⟶ Calcium carbonate
(e) Magnesium + Sulphuric acid ⟶ Magnesium sulphate + Hydrogen
(f) Sodium reacts with water to form sodium hydroxide and hydrogen.
Modern atomic symbols are based on the method proposed by
- Bohr
- Dalton
- Berzelius
- Alchemist
The number of carbon atoms in a hydrogen carbonate radical is
- one
- two
- three
- four