Question

a. classify the following reaction as synthesis, decomposition, single - replacement, double - replacement, and combustion: 1) al₂(so₄)₃ + 3 bacl₂ → 3 baso₄ + 2 alcl₃ 2) al₂s₃ → 2 al + 2 s 3) 2 naoh + cuso₄ → na₂so₄ + cu(oh)₂ 4) fe + h₂so₄ → feso₄ + h₂ 5) c₄h₁₂ + 7 o₂ → 4 co₂ + 6 h₂o

Explanation:

Step1: Analyze reaction 1

Two compounds exchange ions.
$Al_2(SO_4)_3 + 3BaCl_2
ightarrow3BaSO_4 + 2AlCl_3$ is a double - replacement reaction.

Step2: Analyze reaction 2

A single compound breaks into two elements.
$Al_2S_3
ightarrow2Al + 2S$ is a decomposition reaction.

Step3: Analyze reaction 3

Two compounds exchange ions.
$2NaOH + CuSO_4
ightarrow Na_2SO_4+Cu(OH)_2$ is a double - replacement reaction.

Step4: Analyze reaction 4

An element replaces another element in a compound.
$Fe + H_2SO_4
ightarrow FeSO_4 + H_2$ is a single - replacement reaction.

Step5: Analyze reaction 5

A hydrocarbon reacts with oxygen to produce carbon dioxide and water.
$C_4H_{12}+7O_2
ightarrow4CO_2 + 6H_2O$ is a combustion reaction.

Answer:

1. Double - replacement reaction
2. Decomposition reaction
3. Double - replacement reaction
4. Single - replacement reaction
5. Combustion reaction