Let’s balance each of the provided chemical equations and classify them according to their types of reactions.
a) Balancing and Classification
Unbalanced: BaO + Al → Al₂O₃ + Ba
Balanced: 3 BaO + 2 Al → Al₂O₃ + 3 Ba
Type: This is a single replacement reaction (specifically, a redox reaction) where aluminum displaces barium from barium oxide.
b) Balancing and Classification
Unbalanced: NO + O₂ → NO₂
Balanced: 2 NO + O₂ → 2 NO₂
Type: This is a combination reaction (also called a synthesis reaction) where nitrogen monoxide reacts with oxygen to form nitrogen dioxide.
c) Balancing and Classification
Unbalanced: K₂CO₃ → K₂O + CO₂
Balanced: K₂CO₃ → K₂O + CO₂
(Note: This equation is already balanced as is.)
Type: This is a decomposition reaction where potassium carbonate decomposes into potassium oxide and carbon dioxide.
d) Balancing and Classification
Unbalanced: Zn + HCl → ZnCl₂ + H₂
Balanced: Zn + 2 HCl → ZnCl₂ + H₂
Type: This is a single replacement reaction where zinc replaces hydrogen in hydrochloric acid.
e) Balancing and Classification
Unbalanced: Ba(OH)₂ + Fe₂(SO₄)₃ → Fe(OH)₃ + BaSO₄
Balanced: 3 Ba(OH)₂ + Fe₂(SO₄)₃ → 2 Fe(OH)₃ + 3 BaSO₄
Type: This is a double replacement reaction (also called a double displacement reaction) where barium hydroxide reacts with iron(III) sulfate to form iron(III) hydroxide and barium sulfate.
Summary of Balanced Equations:
- \(3 , \text{BaO} + 2 , \text{Al} \rightarrow \text{Al}_2\text{O}_3 + 3 , \text{Ba}\) (Single Replacement)
- \(2 , \text{NO} + \text{O}_2 \rightarrow 2 , \text{NO}_2\) (Combination)
- \(\text{K}_2\text{CO}_3 \rightarrow \text{K}_2\text{O} + \text{CO}_2\) (Decomposition)
- \(\text{Zn} + 2 , \text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2\) (Single Replacement)
- \(3 , \text{Ba(OH)}_2 + \text{Fe}_2(\text{SO}_4)_3 \rightarrow 2 , \text{Fe(OH)}_3 + 3 , \text{BaSO}_4\) (Double Replacement)