To solve the problem, we need to identify the types of chemical reactions for each given equation. Let's analyze each reaction step by step:
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1. CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(g)
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Analysis: Methane (CH₄) reacts with oxygen (O₂) to produce carbon dioxide (CO₂) and water (H₂O). This is a combustion reaction where a hydrocarbon reacts with oxygen to produce carbon dioxide and water, often releasing heat.
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Type of Reaction: Combustion reaction.
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2. SiO₂(s) + CaO(s) → CaSiO₃(s)
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Analysis: Silicon dioxide (SiO₂) reacts with calcium oxide (CaO) to form calcium silicate (CaSiO₃). Here, two compounds combine to form a single compound.
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Type of Reaction: Combination reaction.
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3. 2AgBr(s) → 2Ag(s) + Br₂(g)
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Analysis: Silver bromide (AgBr) decomposes into silver (Ag) and bromine gas (Br₂). This is a decomposition reaction where a single compound breaks down into simpler substances.
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Type of Reaction: Decomposition reaction.
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4. 2NaCl(aq) + F₂(g) → 2NaF(aq) + Cl₂(g)
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Analysis: Sodium chloride (NaCl) reacts with fluorine gas (F₂) to produce sodium fluoride (NaF) and chlorine gas (Cl₂). In this reaction, one element displaces another element from a compound.
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Type of Reaction: Single displacement reaction.
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5. NaOH(aq) + HCl(aq) → NaCl(aq) + H₂O(l)
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Analysis: Sodium hydroxide (NaOH) reacts with hydrochloric acid (HCl) to produce sodium chloride (NaCl) and water (H₂O). This is an acid-base reaction where an acid and a base react to form a salt and water.
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Type of Reaction: Neutralization reaction (a type of double displacement reaction).
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6. C₃H₈(g) + 5O₂(g) → 3CO₂(g) + 4H₂O(g) + Heat
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Analysis: Propane (C₃H₈) reacts with oxygen (O₂) to produce carbon dioxide (CO₂), water (H₂O), and releases heat. This is a combustion reaction where a hydrocarbon reacts with oxygen to produce carbon dioxide, water, and heat.
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Type of Reaction: Combustion reaction.
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7. (NH₄)₂Cr₂O₇ → Cr₂O₃ + N₂↑ + 4H₂O↑
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Analysis: Ammonium dichromate ((NH₄)₂Cr₂O₇) decomposes into chromium(III) oxide (Cr₂O₃), nitrogen gas (N₂), and water vapor (H₂O). This is a decomposition reaction where a single compound breaks down into simpler substances.
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Type of Reaction: Decomposition reaction.
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8. Fe + CuSO₄ → FeSO₄ + Cu
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Analysis: Iron (Fe) reacts with copper sulfate (CuSO₄) to produce iron(II) sulfate (FeSO₄) and copper (Cu). Here, iron displaces copper from copper sulfate.
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Type of Reaction: Single displacement reaction.
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Final Answer
1.
Combustion reaction
2.
Combination reaction
3.
Decomposition reaction
4.
Single displacement reaction
5.
Neutralization reaction (Double displacement reaction)
6.
Combustion reaction
7.
Decomposition reaction
8.
Single displacement reaction
Boxed Answer:
\[
\boxed{
\begin{array}{ll}
1. & \text{Combustion reaction} \\
2. & \text{Combination reaction} \\
3. & \text{Decomposition reaction} \\
4. & \text{Single displacement reaction} \\
5. & \text{Neutralization reaction (Double displacement reaction)} \\
6. & \text{Combustion reaction} \\
7. & \text{Decomposition reaction} \\
8. & \text{Single displacement reaction} \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of types of chemical reactions worksheet.
