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:
- Balance Na: 3 NaOH
- Balance K: 3 KOH
- The equation is already balanced in terms of P and O.
Balanced Equation:
\[ \text{Na}_3\text{PO}_4 + 3\text{KOH} \rightarrow 3\text{NaOH} + \text{K}_3\text{PO}_4 \]
- Balance Mg: 1 MgCO₃
- Balance Li: 2 LiF
- Balance F: 2 LiF (already balanced)
- Balance C and O: 1 Li₂CO₃
Balanced Equation:
\[ \text{MgF}_2 + \text{Li}_2\text{CO}_3 \rightarrow \text{MgCO}_3 + 2\text{LiF} \]
- Balance P: 2 P₂O₃ (4 P atoms)
- Balance O: 3 O₂ (6 O atoms)
Balanced Equation:
\[ \text{P}_4 + 3\text{O}_2 \rightarrow 2\text{P}_2\text{O}_3 \]
- Balance Be: 1 Be(NO₃)₂
- Balance Rb: 2 RbF
- Balance N and O: 2 RbNO₃
Balanced Equation:
\[ 2\text{RbNO}_3 + \text{BeF}_2 \rightarrow \text{Be(NO}_3)_2 + 2\text{RbF} \]
- Balance Cu: 1 Cu(NO₃)₂
- Balance Ag: 2 Ag
- Balance N and O: 2 AgNO₃
Balanced Equation:
\[ 2\text{AgNO}_3 + \text{Cu} \rightarrow \text{Cu(NO}_3)_2 + 2\text{Ag} \]
- Balance C: 1 CBr₄
- Balance Br: 2 Br₂
- Balance F: 2 F₂
Balanced Equation:
\[ \text{CF}_4 + 2\text{Br}_2 \rightarrow \text{CBr}_4 + 2\text{F}_2 \]
- Balance H: 2 HCN
- Balance Cu: 1 CuSO₄
- Balance S and O: 1 H₂SO₄
- Balance C and N: 2 Cu(CN)₂
Balanced Equation:
\[ 2\text{HCN} + \text{CuSO}_4 \rightarrow \text{H}_2\text{SO}_4 + \text{Cu(CN)}_2 \]
- Balance Ga: 1 GaF₃
- Balance Cs: 3 Cs
- Balance F: 3 CsF
Balanced Equation:
\[ \text{GaF}_3 + 3\text{Cs} \rightarrow 3\text{CsF} + \text{Ga} \]
- Balance Ba: 1 BaF₂
- Balance Pt: 1 PtS
- Balance S: 1 BaS
- Balance F: 1 PtF₂
Balanced Equation:
\[ \text{BaS} + \text{PtF}_2 \rightarrow \text{BaF}_2 + \text{PtS} \]
- Balance N: 2 NH₃
- Balance H: 3 H₂
Balanced Equation:
\[ \text{N}_2 + 3\text{H}_2 \rightarrow 2\text{NH}_3 \]
- Balance Na: 2 NaF
- Balance Br: 1 Br₂
- Balance F: 1 F₂
Balanced Equation:
\[ 2\text{NaF} + \text{Br}_2 \rightarrow 2\text{NaBr} + \text{F}_2 \]
- Balance Pb: 1 PbCl₂
- Balance Cl: 2 HCl
- Balance H and O: 2 H₂O
Balanced Equation:
\[ \text{Pb(OH)}_2 + 2\text{HCl} \rightarrow 2\text{H}_2\text{O} + \text{PbCl}_2 \]
- Balance Al: 2 Al₂(SO₄)₃ (4 Al atoms)
- Balance K: 6 KBr
- Balance Br: 6 AlBr₃
- Balance S and O: 3 K₂SO₄
Balanced Equation:
\[ 6\text{AlBr}_3 + 3\text{K}_2\text{SO}_4 \rightarrow 6\text{KBr} + \text{Al}_2(\text{SO}_4)_3 \]
- Balance C: 1 CO₂
- Balance H: 2 H₂O
- Balance O: 2 O₂
Balanced Equation:
\[ \text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O} \]
- Balance Ca: 3 Ca₃(PO₄)₂ (9 Ca atoms)
- Balance Na: 6 NaCl
- Balance Cl: 6 CaCl₂
- Balance P and O: 2 Na₃PO₄
Balanced Equation:
\[ 2\text{Na}_3\text{PO}_4 + 6\text{CaCl}_2 \rightarrow 6\text{NaCl} + \text{Ca}_3(\text{PO}_4)_2 \]
- Balance K: 2 K
- Balance Cl: 2 KCl
Balanced Equation:
\[ 2\text{K} + \text{Cl}_2 \rightarrow 2\text{KCl} \]
- Balance Al: 2 AlCl₃
- Balance H: 3 H₂
- Balance Cl: 6 HCl
Balanced Equation:
\[ 2\text{Al} + 6\text{HCl} \rightarrow 3\text{H}_2 + 2\text{AlCl}_3 \]
- Balance N: 2 NF₃
- Balance F: 3 F₂
Balanced Equation:
\[ \text{N}_2 + 3\text{F}_2 \rightarrow 2\text{NF}_3 \]
- Balance S: 1 SSe₂
- Balance Se: 1 Li₂Se
- Balance Li: 2 Li₂O
- Balance O: 2 SO₂
Balanced Equation:
\[ 2\text{SO}_2 + 2\text{Li}_2\text{Se} \rightarrow \text{SSe}_2 + 4\text{Li}_2\text{O} \]
- Balance N: 2 NH₃
- Balance H: 2 H₂SO₄
- Balance S and O: 1 (NH₄)₂SO₄
Balanced Equation:
\[ 2\text{NH}_3 + \text{H}_2\text{SO}_4 \rightarrow (\text{NH}_4)_2\text{SO}_4 \]
\[
\boxed{
\begin{aligned}
1. & \quad \text{Na}_3\text{PO}_4 + 3\text{KOH} \rightarrow 3\text{NaOH} + \text{K}_3\text{PO}_4 \\
2. & \quad \text{MgF}_2 + \text{Li}_2\text{CO}_3 \rightarrow \text{MgCO}_3 + 2\text{LiF} \\
3. & \quad \text{P}_4 + 3\text{O}_2 \rightarrow 2\text{P}_2\text{O}_3 \\
4. & \quad 2\text{RbNO}_3 + \text{BeF}_2 \rightarrow \text{Be(NO}_3)_2 + 2\text{RbF} \\
5. & \quad 2\text{AgNO}_3 + \text{Cu} \rightarrow \text{Cu(NO}_3)_2 + 2\text{Ag} \\
6. & \quad \text{CF}_4 + 2\text{Br}_2 \rightarrow \text{CBr}_4 + 2\text{F}_2 \\
7. & \quad 2\text{HCN} + \text{CuSO}_4 \rightarrow \text{H}_2\text{SO}_4 + \text{Cu(CN)}_2 \\
8. & \quad \text{GaF}_3 + 3\text{Cs} \rightarrow 3\text{CsF} + \text{Ga} \\
9. & \quad \text{BaS} + \text{PtF}_2 \rightarrow \text{BaF}_2 + \text{PtS} \\
10. & \quad \text{N}_2 + 3\text{H}_2 \rightarrow 2\text{NH}_3 \\
11. & \quad 2\text{NaF} + \text{Br}_2 \rightarrow 2\text{NaBr} + \text{F}_2 \\
12. & \quad \text{Pb(OH)}_2 + 2\text{HCl} \rightarrow 2\text{H}_2\text{O} + \text{PbCl}_2 \\
13. & \quad 6\text{AlBr}_3 + 3\text{K}_2\text{SO}_4 \rightarrow 6\text{KBr} + \text{Al}_2(\text{SO}_4)_3 \\
14. & \quad \text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O} \\
15. & \quad 2\text{Na}_3\text{PO}_4 + 6\text{CaCl}_2 \rightarrow 6\text{NaCl} + \text{Ca}_3(\text{PO}_4)_2 \\
16. & \quad 2\text{K} + \text{Cl}_2 \rightarrow 2\text{KCl} \\
17. & \quad 2\text{Al} + 6\text{HCl} \rightarrow 3\text{H}_2 + 2\text{AlCl}_3 \\
18. & \quad \text{N}_2 + 3\text{F}_2 \rightarrow 2\text{NF}_3 \\
19. & \quad 2\text{SO}_2 + 2\text{Li}_2\text{Se} \rightarrow \text{SSe}_2 + 4\text{Li}_2\text{O} \\
20. & \quad 2\text{NH}_3 + \text{H}_2\text{SO}_4 \rightarrow (\text{NH}_4)_2\text{SO}_4 \\
\end{aligned}
}
\]
1. \( \text{Na}_3\text{PO}_4 + \text{KOH} \rightarrow \text{NaOH} + \text{K}_3\text{PO}_4 \)
- Balance Na: 3 NaOH
- Balance K: 3 KOH
- The equation is already balanced in terms of P and O.
Balanced Equation:
\[ \text{Na}_3\text{PO}_4 + 3\text{KOH} \rightarrow 3\text{NaOH} + \text{K}_3\text{PO}_4 \]
2. \( \text{MgF}_2 + \text{Li}_2\text{CO}_3 \rightarrow \text{MgCO}_3 + \text{LiF} \)
- Balance Mg: 1 MgCO₃
- Balance Li: 2 LiF
- Balance F: 2 LiF (already balanced)
- Balance C and O: 1 Li₂CO₃
Balanced Equation:
\[ \text{MgF}_2 + \text{Li}_2\text{CO}_3 \rightarrow \text{MgCO}_3 + 2\text{LiF} \]
3. \( \text{P}_4 + \text{O}_2 \rightarrow \text{P}_2\text{O}_3 \)
- Balance P: 2 P₂O₃ (4 P atoms)
- Balance O: 3 O₂ (6 O atoms)
Balanced Equation:
\[ \text{P}_4 + 3\text{O}_2 \rightarrow 2\text{P}_2\text{O}_3 \]
4. \( \text{RbNO}_3 + \text{BeF}_2 \rightarrow \text{Be(NO}_3)_2 + \text{RbF} \)
- Balance Be: 1 Be(NO₃)₂
- Balance Rb: 2 RbF
- Balance N and O: 2 RbNO₃
Balanced Equation:
\[ 2\text{RbNO}_3 + \text{BeF}_2 \rightarrow \text{Be(NO}_3)_2 + 2\text{RbF} \]
5. \( \text{AgNO}_3 + \text{Cu} \rightarrow \text{Cu(NO}_3)_2 + \text{Ag} \)
- Balance Cu: 1 Cu(NO₃)₂
- Balance Ag: 2 Ag
- Balance N and O: 2 AgNO₃
Balanced Equation:
\[ 2\text{AgNO}_3 + \text{Cu} \rightarrow \text{Cu(NO}_3)_2 + 2\text{Ag} \]
6. \( \text{CF}_4 + \text{Br}_2 \rightarrow \text{CBr}_4 + \text{F}_2 \)
- Balance C: 1 CBr₄
- Balance Br: 2 Br₂
- Balance F: 2 F₂
Balanced Equation:
\[ \text{CF}_4 + 2\text{Br}_2 \rightarrow \text{CBr}_4 + 2\text{F}_2 \]
7. \( \text{HCN} + \text{CuSO}_4 \rightarrow \text{H}_2\text{SO}_4 + \text{Cu(CN)}_2 \)
- Balance H: 2 HCN
- Balance Cu: 1 CuSO₄
- Balance S and O: 1 H₂SO₄
- Balance C and N: 2 Cu(CN)₂
Balanced Equation:
\[ 2\text{HCN} + \text{CuSO}_4 \rightarrow \text{H}_2\text{SO}_4 + \text{Cu(CN)}_2 \]
8. \( \text{GaF}_3 + \text{Cs} \rightarrow \text{CsF} + \text{Ga} \)
- Balance Ga: 1 GaF₃
- Balance Cs: 3 Cs
- Balance F: 3 CsF
Balanced Equation:
\[ \text{GaF}_3 + 3\text{Cs} \rightarrow 3\text{CsF} + \text{Ga} \]
9. \( \text{BaS} + \text{PtF}_2 \rightarrow \text{BaF}_2 + \text{PtS} \)
- Balance Ba: 1 BaF₂
- Balance Pt: 1 PtS
- Balance S: 1 BaS
- Balance F: 1 PtF₂
Balanced Equation:
\[ \text{BaS} + \text{PtF}_2 \rightarrow \text{BaF}_2 + \text{PtS} \]
10. \( \text{N}_2 + \text{H}_2 \rightarrow \text{NH}_3 \)
- Balance N: 2 NH₃
- Balance H: 3 H₂
Balanced Equation:
\[ \text{N}_2 + 3\text{H}_2 \rightarrow 2\text{NH}_3 \]
11. \( \text{NaF} + \text{Br}_2 \rightarrow \text{NaBr} + \text{F}_2 \)
- Balance Na: 2 NaF
- Balance Br: 1 Br₂
- Balance F: 1 F₂
Balanced Equation:
\[ 2\text{NaF} + \text{Br}_2 \rightarrow 2\text{NaBr} + \text{F}_2 \]
12. \( \text{Pb(OH)}_2 + \text{HCl} \rightarrow \text{H}_2\text{O} + \text{PbCl}_2 \)
- Balance Pb: 1 PbCl₂
- Balance Cl: 2 HCl
- Balance H and O: 2 H₂O
Balanced Equation:
\[ \text{Pb(OH)}_2 + 2\text{HCl} \rightarrow 2\text{H}_2\text{O} + \text{PbCl}_2 \]
13. \( \text{AlBr}_3 + \text{K}_2\text{SO}_4 \rightarrow \text{KBr} + \text{Al}_2(\text{SO}_4)_3 \)
- Balance Al: 2 Al₂(SO₄)₃ (4 Al atoms)
- Balance K: 6 KBr
- Balance Br: 6 AlBr₃
- Balance S and O: 3 K₂SO₄
Balanced Equation:
\[ 6\text{AlBr}_3 + 3\text{K}_2\text{SO}_4 \rightarrow 6\text{KBr} + \text{Al}_2(\text{SO}_4)_3 \]
14. \( \text{CH}_4 + \text{O}_2 \rightarrow \text{CO}_2 + \text{H}_2\text{O} \)
- Balance C: 1 CO₂
- Balance H: 2 H₂O
- Balance O: 2 O₂
Balanced Equation:
\[ \text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O} \]
15. \( \text{Na}_3\text{PO}_4 + \text{CaCl}_2 \rightarrow \text{NaCl} + \text{Ca}_3(\text{PO}_4)_2 \)
- Balance Ca: 3 Ca₃(PO₄)₂ (9 Ca atoms)
- Balance Na: 6 NaCl
- Balance Cl: 6 CaCl₂
- Balance P and O: 2 Na₃PO₄
Balanced Equation:
\[ 2\text{Na}_3\text{PO}_4 + 6\text{CaCl}_2 \rightarrow 6\text{NaCl} + \text{Ca}_3(\text{PO}_4)_2 \]
16. \( \text{K} + \text{Cl}_2 \rightarrow \text{KCl} \)
- Balance K: 2 K
- Balance Cl: 2 KCl
Balanced Equation:
\[ 2\text{K} + \text{Cl}_2 \rightarrow 2\text{KCl} \]
17. \( \text{Al} + \text{HCl} \rightarrow \text{H}_2 + \text{AlCl}_3 \)
- Balance Al: 2 AlCl₃
- Balance H: 3 H₂
- Balance Cl: 6 HCl
Balanced Equation:
\[ 2\text{Al} + 6\text{HCl} \rightarrow 3\text{H}_2 + 2\text{AlCl}_3 \]
18. \( \text{N}_2 + \text{F}_2 \rightarrow \text{NF}_3 \)
- Balance N: 2 NF₃
- Balance F: 3 F₂
Balanced Equation:
\[ \text{N}_2 + 3\text{F}_2 \rightarrow 2\text{NF}_3 \]
19. \( \text{SO}_2 + \text{Li}_2\text{Se} \rightarrow \text{SSe}_2 + \text{Li}_2\text{O} \)
- Balance S: 1 SSe₂
- Balance Se: 1 Li₂Se
- Balance Li: 2 Li₂O
- Balance O: 2 SO₂
Balanced Equation:
\[ 2\text{SO}_2 + 2\text{Li}_2\text{Se} \rightarrow \text{SSe}_2 + 4\text{Li}_2\text{O} \]
20. \( \text{NH}_3 + \text{H}_2\text{SO}_4 \rightarrow (\text{NH}_4)_2\text{SO}_4 \)
- Balance N: 2 NH₃
- Balance H: 2 H₂SO₄
- Balance S and O: 1 (NH₄)₂SO₄
Balanced Equation:
\[ 2\text{NH}_3 + \text{H}_2\text{SO}_4 \rightarrow (\text{NH}_4)_2\text{SO}_4 \]
Final Answer:
\[
\boxed{
\begin{aligned}
1. & \quad \text{Na}_3\text{PO}_4 + 3\text{KOH} \rightarrow 3\text{NaOH} + \text{K}_3\text{PO}_4 \\
2. & \quad \text{MgF}_2 + \text{Li}_2\text{CO}_3 \rightarrow \text{MgCO}_3 + 2\text{LiF} \\
3. & \quad \text{P}_4 + 3\text{O}_2 \rightarrow 2\text{P}_2\text{O}_3 \\
4. & \quad 2\text{RbNO}_3 + \text{BeF}_2 \rightarrow \text{Be(NO}_3)_2 + 2\text{RbF} \\
5. & \quad 2\text{AgNO}_3 + \text{Cu} \rightarrow \text{Cu(NO}_3)_2 + 2\text{Ag} \\
6. & \quad \text{CF}_4 + 2\text{Br}_2 \rightarrow \text{CBr}_4 + 2\text{F}_2 \\
7. & \quad 2\text{HCN} + \text{CuSO}_4 \rightarrow \text{H}_2\text{SO}_4 + \text{Cu(CN)}_2 \\
8. & \quad \text{GaF}_3 + 3\text{Cs} \rightarrow 3\text{CsF} + \text{Ga} \\
9. & \quad \text{BaS} + \text{PtF}_2 \rightarrow \text{BaF}_2 + \text{PtS} \\
10. & \quad \text{N}_2 + 3\text{H}_2 \rightarrow 2\text{NH}_3 \\
11. & \quad 2\text{NaF} + \text{Br}_2 \rightarrow 2\text{NaBr} + \text{F}_2 \\
12. & \quad \text{Pb(OH)}_2 + 2\text{HCl} \rightarrow 2\text{H}_2\text{O} + \text{PbCl}_2 \\
13. & \quad 6\text{AlBr}_3 + 3\text{K}_2\text{SO}_4 \rightarrow 6\text{KBr} + \text{Al}_2(\text{SO}_4)_3 \\
14. & \quad \text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O} \\
15. & \quad 2\text{Na}_3\text{PO}_4 + 6\text{CaCl}_2 \rightarrow 6\text{NaCl} + \text{Ca}_3(\text{PO}_4)_2 \\
16. & \quad 2\text{K} + \text{Cl}_2 \rightarrow 2\text{KCl} \\
17. & \quad 2\text{Al} + 6\text{HCl} \rightarrow 3\text{H}_2 + 2\text{AlCl}_3 \\
18. & \quad \text{N}_2 + 3\text{F}_2 \rightarrow 2\text{NF}_3 \\
19. & \quad 2\text{SO}_2 + 2\text{Li}_2\text{Se} \rightarrow \text{SSe}_2 + 4\text{Li}_2\text{O} \\
20. & \quad 2\text{NH}_3 + \text{H}_2\text{SO}_4 \rightarrow (\text{NH}_4)_2\text{SO}_4 \\
\end{aligned}
}
\]
Parent Tip: Review the logic above to help your child master the concept of balance chemical equations worksheet answers.
