Question

classify each chemical reaction:

ca(s) + cl₂(g) → cacl₂(s)
fecl₂(aq) + bas(aq) → bacl₂(aq) + fes(s)
2h₂o₂(l) → 2h₂o(l) + o₂(g)
2li(s) + 2hcl(aq) → 2licl(aq) + h₂(g)

Explanation:

• For \(Ca(s)+Cl_{2}(g)\to CaCl_{2}(s)\): Two reactants combine to form one product. This is characteristic of a combination reaction.
• For \(FeCl_{2}(aq)+BaS(aq)\to BaCl_{2}(aq)+FeS(s)\): The positive and negative ions of two ionic compounds exchange partners. This is a double - displacement (metathesis) reaction.
• For \(2H_{2}O_{2}(l)\to 2H_{2}O(l)+O_{2}(g)\): One reactant breaks down into two products. This is a decomposition reaction.
• For \(2Li(s)+2HCl(aq)\to 2LiCl(aq)+H_{2}(g)\): A single element (\(Li\)) displaces \(H\) from \(HCl\). This is a single - substitution reaction.

Answer:

1. \(Ca(s)+Cl_{2}(g)\to CaCl_{2}(s)\): combination
2. \(FeCl_{2}(aq)+BaS(aq)\to BaCl_{2}(aq)+FeS(s)\): double displacement (metathesis)
3. \(2H_{2}O_{2}(l)\to 2H_{2}O(l)+O_{2}(g)\): decomposition
4. \(2Li(s)+2HCl(aq)\to 2LiCl(aq)+H_{2}(g)\): single substitution