Types of Chemical Reaction Worksheet with balanced equations and reaction type identification.

Here is the complete solution to your “Types of Chemical Reaction Worksheet,” including balanced equations and the correct reaction type for each.

---

🔢 BALANCED EQUATIONS & REACTION TYPES

---

#### 1. 2 NaBr + 1 Ca(OH)₂ → 1 CaBr₂ + 2 NaOH

✔ Balanced as written.
Reaction Type: Double-Displacement
*(Two compounds exchange ions: Na⁺ with Ca²⁺, Br⁻ with OH⁻)*

---

#### 2. 2 NH₃ + 1 H₂SO₄ → 1 (NH₄)₂SO₄

✔ Balanced as written.
Reaction Type: Synthesis
*(Two reactants combine to form one product — also called combination reaction)*

---

#### 3. 4 C₅H₁₀O + 27 O₂ → 20 CO₂ + 18 H₂O

✔ Balanced as written.
Reaction Type: Combustion
*(Hydrocarbon derivative reacts with oxygen to produce CO₂ and H₂O)*

---

#### 4. 3 Pb + 2 H₃PO₄ → 3 H₂ + 1 Pb₃(PO₄)₂

✔ Balanced as written.
Reaction Type: Single-Displacement
*(Pb displaces H from acid to form H₂ gas and lead phosphate)*

---

#### 5. 1 Li₃N + 3 NH₄NO₃ → 3 LiNO₃ + 1 (NH₄)₃N

✔ Balanced as written.
Reaction Type: Double-Displacement
*(Ions swap partners: Li⁺ with NH₄⁺, N³⁻ with NO₃⁻)*
*Note: (NH₄)₃N is unstable but used here for balancing purposes.*

---

#### 6. 3 HBr + 1 Al(OH)₃ → 3 H₂O + 1 AlBr₃

✔ Balanced as written.
Reaction Type: Double-Displacement (Acid-Base Neutralization)
*(Acid + base → salt + water)*

---

#### 7. 1 Na₃PO₄ + 3 KOH → 3 NaOH + 1 K₃PO₄

✔ Balanced as written.
Reaction Type: Double-Displacement
*(Na⁺ swaps with K⁺, PO₄³⁻ with OH⁻)*

---

#### 8. 1 MgCl₂ + 1 Li₂CO₃ → 1 MgCO₃ + 2 LiCl

✔ Balanced as written.
Reaction Type: Double-Displacement
*(Ions exchange: Mg²⁺ with Li⁺, Cl⁻ with CO₃²⁻)*

---

#### 9. 1 C₈H₁₆ + 12 O₂ → 8 CO₂ + 8 H₂O

✔ Balanced as written.
Reaction Type: Combustion
*(Hydrocarbon burns in oxygen to give CO₂ and H₂O)*

---

## 🧪 REACTION TYPE IDENTIFICATION (Questions 10–20)

---

#### 10. Pb + FeSO₄ → PbSO₄ + Fe

✔ Balanced.
Reaction Type: Single-Displacement
*(Pb displaces Fe from FeSO₄ — note: this is not spontaneous in reality due to reactivity series, but chemically it fits single-displacement)*

---

#### 11. CaCO₃ → CaO + CO₂

✔ Balanced.
Reaction Type: Decomposition
*(One compound breaks into two or more simpler substances)*

---

#### 12. P₄ + 3 O₂ → 2 P₂O₃

✔ Balanced.
Reaction Type: Synthesis
*(Elements combine to form a compound)*

---

#### 13. 2 RbNO₃ + BeF₂ → Be(NO₃)₂ + 2 RbF

✔ Balanced.
Reaction Type: Double-Displacement
*(Rb⁺ swaps with Be²⁺, NO₃⁻ with F⁻)*

---

#### 14. 2 AgNO₃ + Cu → Cu(NO₃)₂ + 2 Ag

✔ Balanced.
Reaction Type: Single-Displacement
*(Cu displaces Ag from AgNO₃ — classic metal displacement)*

---

#### 15. C₃H₆O + 4 O₂ → 3 CO₂ + 3 H₂O

✔ Balanced.
Reaction Type: Combustion
*(Organic compound burns in oxygen)*

---

#### 16. 2 C₅H₅ + Fe → Fe(C₅H₅)₂

✔ Balanced.
Reaction Type: Synthesis
*(Iron combines with cyclopentadienyl ligands to form ferrocene — organometallic synthesis)*

---

#### 17. SeCl₆ + O₂ → SeO₂ + 3 Cl₂

✔ Balanced.
Reaction Type: Single-Displacement
*(Oxygen displaces chlorine from SeCl₆ — unusual, but fits single-displacement pattern)*

---

#### 18. 2 MgI₂ + Mn(SO₃)₂ → 2 MgSO₃ + MnI₄

✔ Balanced.
Reaction Type: Double-Displacement
*(Mg²⁺ swaps with Mn⁴⁺, I⁻ with SO₃²⁻)*
*Note: MnI₄ is unusual; manganese typically forms MnI₂, but we follow the worksheet’s formula.*

---

#### 19. O₃ → O + O₂

✔ Balanced.
Reaction Type: Decomposition
*(Ozone decomposes into atomic oxygen and diatomic oxygen)*

---

#### 20. 2 NO₂ → 2 O₂ + N₂

✘ NOT BALANCED!
Let’s fix it:

Correct balanced equation:
> 2 NO₂ → 2 O₂ + N₂ ← atoms don’t balance!
Left: N=2, O=4
Right: N=2, O=4 ✔
Wait — actually, this IS balanced.

But chemically, this reaction is not typical — NO₂ doesn’t normally decompose to N₂ and O₂. It usually decomposes to NO and O₂. But per the worksheet, we accept it.

✔ Balanced as written.
Reaction Type: Decomposition
*(One compound breaks into two elements)*

---

## ✔ FINAL ANSWER SUMMARY TABLE

| # | Balanced Equation | Reaction Type |
|---|----------------------------------------------|------------------------|
| 1 | 2 NaBr + Ca(OH)₂ → CaBr₂ + 2 NaOH | Double-Displacement |
| 2 | 2 NH₃ + H₂SO₄ → (NH₄)₂SO₄ | Synthesis |
| 3 | 4 C₅H₁₀O + 27 O₂ → 20 CO₂ + 18 H₂O | Combustion |
| 4 | 3 Pb + 2 H₃PO₄ → 3 H₂ + Pb₃(PO₄)₂ | Single-Displacement |
| 5 | Li₃N + 3 NH₄NO₃ → 3 LiNO₃ + (NH₄)₃N | Double-Displacement |
| 6 | 3 HBr + Al(OH)₃ → 3 H₂O + AlBr₃ | Double-Displacement |
| 7 | Na₃PO₄ + 3 KOH → 3 NaOH + K₃PO₄ | Double-Displacement |
| 8 | MgCl₂ + Li₂CO₃ → MgCO₃ + 2 LiCl | Double-Displacement |
| 9 | C₈H₁₆ + 12 O₂ → 8 CO₂ + 8 H₂O | Combustion |
|10 | Pb + FeSO₄ → PbSO₄ + Fe | Single-Displacement |
|11 | CaCO₃ → CaO + CO₂ | Decomposition |
|12 | P₄ + 3 O₂ → 2 P₂O₃ | Synthesis |
|13 | 2 RbNO₃ + BeF₂ → Be(NO₃)₂ + 2 RbF | Double-Displacement |
|14 | 2 AgNO₃ + Cu → Cu(NO₃)₂ + 2 Ag | Single-Displacement |
|15 | C₃H₆O + 4 O₂ → 3 CO₂ + 3 H₂O | Combustion |
|16 | 2 C₅H₅ + Fe → Fe(C₅H₅)₂ | Synthesis |
|17 | SeCl₆ + O₂ → SeO₂ + 3 Cl₂ | Single-Displacement |
|18 | 2 MgI₂ + Mn(SO₃)₂ → 2 MgSO₃ + MnI₄ | Double-Displacement |
|19 | O₃ → O + O₂ | Decomposition |
|20 | 2 NO₂ → 2 O₂ + N₂ | Decomposition |

---

## 📌 KEY CONCEPTS:

- Synthesis: A + B → AB
- Decomposition: AB → A + B
- Single-Displacement: A + BC → AC + B
- Double-Displacement: AB + CD → AD + CB
- Combustion: Hydrocarbon + O₂ → CO₂ + H₂O

---

✔ All equations are now correctly balanced and classified. Let me know if you’d like explanations for any specific reaction!

— Kenneth Myro D. Garcia, RN, MAN, EdD, PhDc (as credited 😉)