Question

classify each chemical reaction as a synthesis, decomposition, single - displacement, or double - displacement reaction. drag the appropriate items to their respective bins.
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pb(s) + 2agno₃(aq) → pb(no₃)₂(aq) + 2ag(s)
hi(aq) + naoh(aq) → h₂o(l) + nai(aq)
caso₄(g) → heat cao(s) + so₃(g)
2na(s) + o₂(g) → na₂o₂(s)
synthesis
decomposition
single - displacement
double - displacement
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Explanation:

• Synthesis reaction: A reaction where two or more reactants combine to form a single product. In the reaction \(2\text{Na}(s)+\text{O}_2(g)\to\text{Na}_2\text{O}_2(s)\), two reactants (\(\text{Na}\) and \(\text{O}_2\)) combine to form one product (\(\text{Na}_2\text{O}_2\)).
• Decomposition reaction: A reaction where a single reactant breaks down into two or more products. For the reaction \(\text{CaSO}_4(g)\xrightarrow{\text{heat}}\text{CaO}(s)+\text{SO}_3(g)\), one reactant (\(\text{CaSO}_4\)) decomposes into two products (\(\text{CaO}\) and \(\text{SO}_3\)).
• Single - displacement reaction: A reaction where one element displaces another element in a compound. In the reaction \(\text{Pb}(s)+2\text{AgNO}_3(aq)\to\text{Pb}(\text{NO}_3)_2(aq)+2\text{Ag}(s)\), lead (\(\text{Pb}\)) displaces silver (\(\text{Ag}\)) from the silver nitrate (\(\text{AgNO}_3\)) compound.
• Double - displacement reaction: A reaction where the cations and anions of two ionic compounds exchange places. In the reaction \(\text{HI}(aq)+\text{NaOH}(aq)\to\text{H}_2\text{O}(l)+\text{NaI}(aq)\), the \(H^+\) from \(\text{HI}\) and \(Na^+\) from \(\text{NaOH}\) exchange their anions (\(I^-\) and \(OH^-\)).

Answer:

• Synthesis: \(2\text{Na}(s)+\text{O}_2(g)\to\text{Na}_2\text{O}_2(s)\)
• Decomposition: \(\text{CaSO}_4(g)\xrightarrow{\text{heat}}\text{CaO}(s)+\text{SO}_3(g)\)
• Single - displacement: \(\text{Pb}(s)+2\text{AgNO}_3(aq)\to\text{Pb}(\text{NO}_3)_2(aq)+2\text{Ag}(s)\)
• Double - displacement: \(\text{HI}(aq)+\text{NaOH}(aq)\to\text{H}_2\text{O}(l)+\text{NaI}(aq)\)