Question

Identify the type of chemical reaction.

1. 2KOH₍aq₎ + CuSO₄₍aq₎ → Cu(OH)₂₍s₎ + K₂SO₄₍aq₎ --> ?
2. 2Al₍s₎ + 3Br₂₍l₎ → 2AlBr₃₍s₎ --> ?
3. 4PBr₃₍l₎ → P₄₍s₎ + 6Br₂₍l₎ --> ?
4. 2C₂H₆₍g₎ + 7O₂₍g₎ → 4CO₂₍g₎ + 6H₂O₍g₎ --> ?

Answer 1

The four reactions are classified as double displacement, synthesis, decomposition, and combustion, based on the rearrangements and transformations of the components in each chemical equation.

Step-by-step explanation:

Each of the chemical reactions described can be classified into one of the types of chemical reactions commonly taught in high school chemistry courses.

1. 2KOH₍(aq)₎ + CuSO₄₍(aq)₎ → Cu(OH)₂₍(s)₎ + K₂SO₄₍(aq)₎ -- This is a double displacement reaction because the ions in the reactants exchange partners to form new compounds.
2. 2Al₍(s)₎ + 3Br₂₍(l)₎ → 2AlBr₃₍(s)₎ -- This is a synthesis reaction where two simpler substances combine to form a more complex compound.
3. 4PBr₃₍(l)₎ → P₄₍(s)₎ + 6Br₂₍(l)₎ -- This is a decomposition reaction where a single compound breaks down into simpler substances.
4. 2C₂H₆₍(g)₎ + 7O₂₍(g)₎ → 4CO₂₍(g)₎ + 6H₂O₍(g)₎ -- This is a combustion reaction that involves oxygen and produces carbon dioxide and water.