49 Balancing Chemical Equations Worksheets [with Answers] - Free Printable
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Step-by-step solution for: 49 Balancing Chemical Equations Worksheets [with Answers]
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Show Answer Key & Explanations
Step-by-step solution for: 49 Balancing Chemical Equations Worksheets [with Answers]
To solve the problem of balancing chemical equations, we need to ensure that the number of atoms of each element is the same on both sides of the equation. Here are the balanced equations for each problem:
---
- Balanced Equation:
\[
\text{Ca(AlO}_2\text{)}_2 + 6\text{HCl} \rightarrow 2\text{AlCl}_3 + \text{CaCl}_2 + 2\text{H}_2\text{O}
\]
---
- Balanced Equation:
\[
\text{CeO}_2 + 4\text{KI} + 4\text{HCl} \rightarrow 4\text{KCl} + \text{CeCl}_3 + 2\text{H}_2\text{O} + 2\text{I}_2
\]
---
- Balanced Equation:
\[
2\text{Ho} + 6\text{H}_2\text{O} \rightarrow 2\text{Ho(OH)}_3 + 3\text{H}_2
\]
---
- Balanced Equation:
\[
2\text{IrCl}_3 + 6\text{NaOH} \rightarrow \text{Ir}_2\text{O}_3 + 6\text{HCl} + 6\text{NaCl}
\]
---
- Balanced Equation:
\[
2\text{MoO}_3 + 4\text{Zn} + 4\text{H}_2\text{SO}_4 \rightarrow \text{Mo}_2\text{O}_3 + 4\text{ZnSO}_4 + 4\text{H}_2\text{O}
\]
---
- Balanced Equation:
\[
\text{Cu} + 2\text{H}_2\text{SO}_4 \rightarrow \text{CuSO}_4 + \text{SO}_2 + 2\text{H}_2\text{O}
\]
---
- Balanced Equation:
\[
(\text{NH}_4)_2\text{SO}_4 + 2\text{KOH} \rightarrow \text{K}_2\text{SO}_4 + 2\text{NH}_3 + 2\text{H}_2\text{O}
\]
---
- Unbalanced: FeS₂ + O₂ → Fe₂O₃ + SO₂
- Balanced Equation:
\[
4\text{FeS}_2 + 11\text{O}_2 \rightarrow 2\text{Fe}_2\text{O}_3 + 8\text{SO}_2
\]
---
- Unbalanced: NH₃ + O₂ → NO + H₂O
- Balanced Equation:
\[
4\text{NH}_3 + 5\text{O}_2 \rightarrow 4\text{NO} + 6\text{H}_2\text{O}
\]
---
- Unbalanced: Ca(OH)₂ + HNO₂ → Ca(NO₂)₂ + H₂O
- Balanced Equation:
\[
\text{Ca(OH)}_2 + 2\text{HNO}_2 \rightarrow \text{Ca(NO}_2\text{)}_2 + 2\text{H}_2\text{O}
\]
---
- Unbalanced: Al + Pb(NO₃)₂ → Al(NO₃)₃ + Pb
- Balanced Equation:
\[
2\text{Al} + 3\text{Pb(NO}_3\text{)}_2 \rightarrow 2\text{Al(NO}_3\text{)}_3 + 3\text{Pb}
\]
---
- Unbalanced: CH₄ + O₂ → CO₂ + H₂O
- Balanced Equation:
\[
\text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O}
\]
---
- Unbalanced: Al(NO₃)₃ + H₂SO₄ → Al₂(SO₄)₃ + HNO₃
- Balanced Equation:
\[
2\text{Al(NO}_3\text{)}_3 + 3\text{H}_2\text{SO}_4 \rightarrow \text{Al}_2(\text{SO}_4)_3 + 6\text{HNO}_3
\]
---
- Unbalanced: Fe + HCl → FeCl₃ + H₂
- Balanced Equation:
\[
2\text{Fe} + 6\text{HCl} \rightarrow 2\text{FeCl}_3 + 3\text{H}_2
\]
---
- Unbalanced: H₃PO₄ + Mg(OH)₂ → Mg₃(PO₄)₂ + H₂O
- Balanced Equation:
\[
2\text{H}_3\text{PO}_4 + 3\text{Mg(OH)}_2 \rightarrow \text{Mg}_3(\text{PO}_4)_2 + 6\text{H}_2\text{O}
\]
---
- Unbalanced: FeBr₃ + (NH₄)₂S → Fe₂S₃ + NH₄Br
- Balanced Equation:
\[
2\text{FeBr}_3 + 3(\text{NH}_4)_2\text{S} \rightarrow \text{Fe}_2\text{S}_3 + 6\text{NH}_4\text{Br}
\]
---
- Unbalanced: C₆H₆ + O₂ → CO₂ + H₂O
- Balanced Equation:
\[
2\text{C}_6\text{H}_6 + 15\text{O}_2 \rightarrow 12\text{CO}_2 + 6\text{H}_2\text{O}
\]
---
\[
\boxed{
\begin{aligned}
1. & \quad \text{Ca(AlO}_2\text{)}_2 + 6\text{HCl} \rightarrow 2\text{AlCl}_3 + \text{CaCl}_2 + 2\text{H}_2\text{O} \\
2. & \quad \text{CeO}_2 + 4\text{KI} + 4\text{HCl} \rightarrow 4\text{KCl} + \text{CeCl}_3 + 2\text{H}_2\text{O} + 2\text{I}_2 \\
3. & \quad 2\text{Ho} + 6\text{H}_2\text{O} \rightarrow 2\text{Ho(OH)}_3 + 3\text{H}_2 \\
4. & \quad 2\text{IrCl}_3 + 6\text{NaOH} \rightarrow \text{Ir}_2\text{O}_3 + 6\text{HCl} + 6\text{NaCl} \\
5. & \quad 2\text{MoO}_3 + 4\text{Zn} + 4\text{H}_2\text{SO}_4 \rightarrow \text{Mo}_2\text{O}_3 + 4\text{ZnSO}_4 + 4\text{H}_2\text{O} \\
6. & \quad \text{Cu} + 2\text{H}_2\text{SO}_4 \rightarrow \text{CuSO}_4 + \text{SO}_2 + 2\text{H}_2\text{O} \\
7. & \quad (\text{NH}_4)_2\text{SO}_4 + 2\text{KOH} \rightarrow \text{K}_2\text{SO}_4 + 2\text{NH}_3 + 2\text{H}_2\text{O} \\
8. & \quad 4\text{FeS}_2 + 11\text{O}_2 \rightarrow 2\text{Fe}_2\text{O}_3 + 8\text{SO}_2 \\
9. & \quad 4\text{NH}_3 + 5\text{O}_2 \rightarrow 4\text{NO} + 6\text{H}_2\text{O} \\
10. & \quad \text{Ca(OH)}_2 + 2\text{HNO}_2 \rightarrow \text{Ca(NO}_2\text{)}_2 + 2\text{H}_2\text{O} \\
11. & \quad 2\text{Al} + 3\text{Pb(NO}_3\text{)}_2 \rightarrow 2\text{Al(NO}_3\text{)}_3 + 3\text{Pb} \\
12. & \quad \text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O} \\
13. & \quad 2\text{Al(NO}_3\text{)}_3 + 3\text{H}_2\text{SO}_4 \rightarrow \text{Al}_2(\text{SO}_4)_3 + 6\text{HNO}_3 \\
14. & \quad 2\text{Fe} + 6\text{HCl} \rightarrow 2\text{FeCl}_3 + 3\text{H}_2 \\
15. & \quad 2\text{H}_3\text{PO}_4 + 3\text{Mg(OH)}_2 \rightarrow \text{Mg}_3(\text{PO}_4)_2 + 6\text{H}_2\text{O} \\
16. & \quad 2\text{FeBr}_3 + 3(\text{NH}_4)_2\text{S} \rightarrow \text{Fe}_2\text{S}_3 + 6\text{NH}_4\text{Br} \\
17. & \quad 2\text{C}_6\text{H}_6 + 15\text{O}_2 \rightarrow 12\text{CO}_2 + 6\text{H}_2\text{O}
\end{aligned}
}
\]
---
1. Ca(AlO₂)₂ + HCl → AlCl₃ + CaCl₂ + H₂O
- Balanced Equation:
\[
\text{Ca(AlO}_2\text{)}_2 + 6\text{HCl} \rightarrow 2\text{AlCl}_3 + \text{CaCl}_2 + 2\text{H}_2\text{O}
\]
---
2. CeO₂ + KI + HCl → KCl + CeCl₃ + H₂O + I₂
- Balanced Equation:
\[
\text{CeO}_2 + 4\text{KI} + 4\text{HCl} \rightarrow 4\text{KCl} + \text{CeCl}_3 + 2\text{H}_2\text{O} + 2\text{I}_2
\]
---
3. Ho + H₂O → Ho(OH)₃ + H₂
- Balanced Equation:
\[
2\text{Ho} + 6\text{H}_2\text{O} \rightarrow 2\text{Ho(OH)}_3 + 3\text{H}_2
\]
---
4. IrCl₃ + NaOH → Ir₂O₃ + HCl + NaCl
- Balanced Equation:
\[
2\text{IrCl}_3 + 6\text{NaOH} \rightarrow \text{Ir}_2\text{O}_3 + 6\text{HCl} + 6\text{NaCl}
\]
---
5. MoO₃ + Zn + H₂SO₄ → Mo₂O₃ + ZnSO₄ + H₂O
- Balanced Equation:
\[
2\text{MoO}_3 + 4\text{Zn} + 4\text{H}_2\text{SO}_4 \rightarrow \text{Mo}_2\text{O}_3 + 4\text{ZnSO}_4 + 4\text{H}_2\text{O}
\]
---
6. Cu + H₂SO₄ → CuSO₄ + SO₂ + H₂O
- Balanced Equation:
\[
\text{Cu} + 2\text{H}_2\text{SO}_4 \rightarrow \text{CuSO}_4 + \text{SO}_2 + 2\text{H}_2\text{O}
\]
---
7. (NH₄)₂SO₄ + KOH → K₂SO₄ + NH₃ + H₂O
- Balanced Equation:
\[
(\text{NH}_4)_2\text{SO}_4 + 2\text{KOH} \rightarrow \text{K}_2\text{SO}_4 + 2\text{NH}_3 + 2\text{H}_2\text{O}
\]
---
8. Ferric sulfide + oxygen gas → ferric oxide + sulfur dioxide
- Unbalanced: FeS₂ + O₂ → Fe₂O₃ + SO₂
- Balanced Equation:
\[
4\text{FeS}_2 + 11\text{O}_2 \rightarrow 2\text{Fe}_2\text{O}_3 + 8\text{SO}_2
\]
---
9. Ammonia + oxygen gas → nitrogen monoxide + water
- Unbalanced: NH₃ + O₂ → NO + H₂O
- Balanced Equation:
\[
4\text{NH}_3 + 5\text{O}_2 \rightarrow 4\text{NO} + 6\text{H}_2\text{O}
\]
---
10. Calcium hydroxide + nitrous acid → calcium nitrite + water
- Unbalanced: Ca(OH)₂ + HNO₂ → Ca(NO₂)₂ + H₂O
- Balanced Equation:
\[
\text{Ca(OH)}_2 + 2\text{HNO}_2 \rightarrow \text{Ca(NO}_2\text{)}_2 + 2\text{H}_2\text{O}
\]
---
11. Aluminum + plumbous nitrate → aluminum nitrate + lead
- Unbalanced: Al + Pb(NO₃)₂ → Al(NO₃)₃ + Pb
- Balanced Equation:
\[
2\text{Al} + 3\text{Pb(NO}_3\text{)}_2 \rightarrow 2\text{Al(NO}_3\text{)}_3 + 3\text{Pb}
\]
---
12. Methane + oxygen gas → carbon dioxide + water vapor
- Unbalanced: CH₄ + O₂ → CO₂ + H₂O
- Balanced Equation:
\[
\text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O}
\]
---
13. Aluminum nitrate + sulfuric acid → aluminum sulfate + nitric acid
- Unbalanced: Al(NO₃)₃ + H₂SO₄ → Al₂(SO₄)₃ + HNO₃
- Balanced Equation:
\[
2\text{Al(NO}_3\text{)}_3 + 3\text{H}_2\text{SO}_4 \rightarrow \text{Al}_2(\text{SO}_4)_3 + 6\text{HNO}_3
\]
---
14. Iron + hydrochloric acid → ferric chloride + hydrogen
- Unbalanced: Fe + HCl → FeCl₃ + H₂
- Balanced Equation:
\[
2\text{Fe} + 6\text{HCl} \rightarrow 2\text{FeCl}_3 + 3\text{H}_2
\]
---
15. Phosphoric acid + magnesium hydroxide → magnesium phosphate + water
- Unbalanced: H₃PO₄ + Mg(OH)₂ → Mg₃(PO₄)₂ + H₂O
- Balanced Equation:
\[
2\text{H}_3\text{PO}_4 + 3\text{Mg(OH)}_2 \rightarrow \text{Mg}_3(\text{PO}_4)_2 + 6\text{H}_2\text{O}
\]
---
16. Ferric bromide + ammonium sulfide → ferric sulfide + ammonium bromide
- Unbalanced: FeBr₃ + (NH₄)₂S → Fe₂S₃ + NH₄Br
- Balanced Equation:
\[
2\text{FeBr}_3 + 3(\text{NH}_4)_2\text{S} \rightarrow \text{Fe}_2\text{S}_3 + 6\text{NH}_4\text{Br}
\]
---
17. Benzene (C₆H₆) + oxygen gas → carbon dioxide + water vapor
- Unbalanced: C₆H₆ + O₂ → CO₂ + H₂O
- Balanced Equation:
\[
2\text{C}_6\text{H}_6 + 15\text{O}_2 \rightarrow 12\text{CO}_2 + 6\text{H}_2\text{O}
\]
---
Final Answer:
\[
\boxed{
\begin{aligned}
1. & \quad \text{Ca(AlO}_2\text{)}_2 + 6\text{HCl} \rightarrow 2\text{AlCl}_3 + \text{CaCl}_2 + 2\text{H}_2\text{O} \\
2. & \quad \text{CeO}_2 + 4\text{KI} + 4\text{HCl} \rightarrow 4\text{KCl} + \text{CeCl}_3 + 2\text{H}_2\text{O} + 2\text{I}_2 \\
3. & \quad 2\text{Ho} + 6\text{H}_2\text{O} \rightarrow 2\text{Ho(OH)}_3 + 3\text{H}_2 \\
4. & \quad 2\text{IrCl}_3 + 6\text{NaOH} \rightarrow \text{Ir}_2\text{O}_3 + 6\text{HCl} + 6\text{NaCl} \\
5. & \quad 2\text{MoO}_3 + 4\text{Zn} + 4\text{H}_2\text{SO}_4 \rightarrow \text{Mo}_2\text{O}_3 + 4\text{ZnSO}_4 + 4\text{H}_2\text{O} \\
6. & \quad \text{Cu} + 2\text{H}_2\text{SO}_4 \rightarrow \text{CuSO}_4 + \text{SO}_2 + 2\text{H}_2\text{O} \\
7. & \quad (\text{NH}_4)_2\text{SO}_4 + 2\text{KOH} \rightarrow \text{K}_2\text{SO}_4 + 2\text{NH}_3 + 2\text{H}_2\text{O} \\
8. & \quad 4\text{FeS}_2 + 11\text{O}_2 \rightarrow 2\text{Fe}_2\text{O}_3 + 8\text{SO}_2 \\
9. & \quad 4\text{NH}_3 + 5\text{O}_2 \rightarrow 4\text{NO} + 6\text{H}_2\text{O} \\
10. & \quad \text{Ca(OH)}_2 + 2\text{HNO}_2 \rightarrow \text{Ca(NO}_2\text{)}_2 + 2\text{H}_2\text{O} \\
11. & \quad 2\text{Al} + 3\text{Pb(NO}_3\text{)}_2 \rightarrow 2\text{Al(NO}_3\text{)}_3 + 3\text{Pb} \\
12. & \quad \text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O} \\
13. & \quad 2\text{Al(NO}_3\text{)}_3 + 3\text{H}_2\text{SO}_4 \rightarrow \text{Al}_2(\text{SO}_4)_3 + 6\text{HNO}_3 \\
14. & \quad 2\text{Fe} + 6\text{HCl} \rightarrow 2\text{FeCl}_3 + 3\text{H}_2 \\
15. & \quad 2\text{H}_3\text{PO}_4 + 3\text{Mg(OH)}_2 \rightarrow \text{Mg}_3(\text{PO}_4)_2 + 6\text{H}_2\text{O} \\
16. & \quad 2\text{FeBr}_3 + 3(\text{NH}_4)_2\text{S} \rightarrow \text{Fe}_2\text{S}_3 + 6\text{NH}_4\text{Br} \\
17. & \quad 2\text{C}_6\text{H}_6 + 15\text{O}_2 \rightarrow 12\text{CO}_2 + 6\text{H}_2\text{O}
\end{aligned}
}
\]
Parent Tip: Review the logic above to help your child master the concept of writing balanced equations worksheet.
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