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Core Chemistry Skill: Writing Equations for Reactions of Acids and Bases

Classify the following unbalanced chemical reactions as neutralization or precipitation reactions.

Drag the appropriate reactions to their respective bins.

[tex]\[
\begin{array}{l}
\text{1. } \text{Mg(OH)}_2(\text{aq}) + \text{HCl} (\text{aq}) \rightarrow \text{MgCl}_2(\text{aq}) + \text{H}_2\text{O} (\text{l}) \\
\text{2. } \text{BaCl}_2(\text{aq}) + \text{Na}_2\text{SO}_4(\text{aq}) \rightarrow \text{BaSO}_4(\text{s}) \downarrow + \text{NaCl} (\text{aq}) \\
\text{3. } \text{CH}_3\text{COOH} (\text{aq}) + \text{KOH} (\text{aq}) \rightarrow \text{CH}_3\text{COOK} (\text{aq}) + \text{H}_2\text{O} (\text{l}) \\
\text{4. } \text{Pb(NO}_3\text{)}_2(\text{aq}) + \text{KI} (\text{aq}) \rightarrow \text{PbI}_2(\text{s}) \downarrow + \text{KNO}_3(\text{aq}) \\
\text{5. } \text{AgNO}_3(\text{aq}) + \text{NaCl} (\text{aq}) \rightarrow \text{AgCl} (\text{s}) \downarrow + \text{NaNO}_3(\text{aq}) \\
\text{6. } \text{HBr} (\text{aq}) + \text{NaOH} (\text{aq}) \rightarrow \text{NaBr} (\text{aq}) + \text{H}_2\text{O} (\text{l}) \\
\end{array}
\][/tex]

- Neutralization reactions:
- 1. [tex]\(\text{Mg(OH)}_2(\text{aq}) + \text{HCl} (\text{aq}) \rightarrow \text{MgCl}_2(\text{aq}) + \text{H}_2\text{O} (\text{l})\)[/tex]
- 3. [tex]\(\text{CH}_3\text{COOH} (\text{aq}) + \text{KOH} (\text{aq}) \rightarrow \text{CH}_3\text{COOK} (\text{aq}) + \text{H}_2\text{O} (\text{l})\)[/tex]
- 6. [tex]\(\text{HBr} (\text{aq}) + \text{NaOH} (\text{aq}) \rightarrow \text{NaBr} (\text{aq}) + \text{H}_2\text{O} (\text{l})\)[/tex]

- Precipitation reactions:
- 2. [tex]\(\text{BaCl}_2(\text{aq}) + \text{Na}_2\text{SO}_4(\text{aq}) \rightarrow \text{BaSO}_4(\text{s}) \downarrow + \text{NaCl} (\text{aq})\)[/tex]
- 4. [tex]\(\text{Pb(NO}_3\text{)}_2(\text{aq}) + \text{KI} (\text{aq}) \rightarrow \text{PbI}_2(\text{s}) \downarrow + \text{KNO}_3(\text{aq})\)[/tex]
- 5. [tex]\(\text{AgNO}_3(\text{aq}) + \text{NaCl} (\text{aq}) \rightarrow \text{AgCl} (\text{s}) \downarrow + \text{NaNO}_3(\text{aq})\)[/tex]

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Note: Ensure you drag and classify the reactions accordingly.



Answer :

GinnyAnswer
Certainly! To classify each given chemical reaction as either a neutralization or a precipitation reaction, let’s first understand the nature of these types of reactions:

- Neutralization Reactions: These are reactions where an acid reacts with a base to form a salt and water. Typically, they involve hydroxide ions (OH⁻) from the base reacting with hydrogen ions (H⁺) from the acid to produce water (H₂O).

- Precipitation Reactions: These reactions occur when two aqueous solutions combine to form an insoluble solid known as a precipitate. The precipitate is indicated by a solid (s) in the reaction.

Given these definitions, let’s classify the unbalanced chemical reactions:

1. Mg(OH)₂(aq) + HCl(aq) → MgCl₂(aq) + H₂O(l)
- Trait: Acid (HCl) + Base (Mg(OH)₂) → Salt (MgCl₂) + Water (H₂O)
- Classification: Neutralization Reaction

2. BaCl₂(aq) + Na₂SO₄(aq) → BaSO₄(s)↓ + NaCl(aq)
- Trait: Formation of an insoluble solid (BaSO₄)
- Classification: Precipitation Reaction

3. CH₃COOH(aq) + KOH(aq) → CH₃COOK(aq) + H₂O(l)
- Trait: Acid (CH₃COOH) + Base (KOH) → Salt (CH₃COOK) + Water (H₂O)
- Classification: Neutralization Reaction

4. Pb(NO₃)₂(aq) + KI(aq) → PbI₂(s)↓ + KNO₃(aq)
- Trait: Formation of an insoluble solid (PbI₂)
- Classification: Precipitation Reaction

5. AgNO₃(aq) + NaCl(aq) → AgCl(s)↓ + NaNO₃(aq)
- Trait: Formation of an insoluble solid (AgCl)
- Classification: Precipitation Reaction

6. HBr(aq) + NaOH(aq) → NaBr(aq) + H₂O(l)
- Trait: Acid (HBr) + Base (NaOH) → Salt (NaBr) + Water (H₂O)
- Classification: Neutralization Reaction

Now, let’s place these reactions into their respective bins:

Neutralization Reactions
1. Mg(OH)₂(aq) + HCl(aq) → MgCl₂(aq) + H₂O(l)
2. CH₃COOH(aq) + KOH(aq) → CH₃COOK(aq) + H₂O(l)
3. HBr(aq) + NaOH(aq) → NaBr(aq) + H₂O(l)

Precipitation Reactions
1. BaCl₂(aq) + Na₂SO₄(aq) → BaSO₄(s)↓ + NaCl(aq)
2. Pb(NO₃)₂(aq) + KI(aq) → PbI₂(s)↓ + KNO₃(aq)
3. AgNO₃(aq) + NaCl(aq) → AgCl(s)↓ + NaNO₃(aq)

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