Balancing Chemical Equations Worksheet

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Balancing Chemical Equations Worksheet

Name:Date:Class:

1.Balance the equation:

Mg + HCl \to MgCl_{2} + H_{2}

2.Balance the equation:

CaCO_{3} \to CaO + CO_{2}

3.Balance the equation:

Mg + HCl \to MgCl_{2} + H_{2}

4.Balance the equation:

NaOH + H_{2} SO_{4} \to Na_{2} SO_{4} + H_{2} O

5.Balance the equation:

NaOH + H_{2} SO_{4} \to Na_{2} SO_{4} + H_{2} O

6.Balance the equation:

Al + HCl \to AlCl_{3} + H_{2}

7.Balance the equation:

Zn + HCl \to ZnCl_{2} + H_{2}

8.Balance the equation:

CH_{4} + O_{2} \to CO_{2} + H_{2} O

9.Balance the equation:

Al + HCl \to AlCl_{3} + H_{2}

10.Balance the equation:

Fe + HCl \to FeCl_{2} + H_{2}

11.Balance the equation:

Fe + HCl \to FeCl_{2} + H_{2}

12.Balance the equation:

CaCO_{3} \to CaO + CO_{2}

13.Balance the equation:

CaCO_{3} \to CaO + CO_{2}

14.Balance the equation:

CaCO_{3} \to CaO + CO_{2}

15.Balance the equation:

CaCO_{3} \to CaO + CO_{2}

16.Balance the equation:

Fe + HCl \to FeCl_{2} + H_{2}

17.Balance the equation:

CH_{4} + O_{2} \to CO_{2} + H_{2} O

18.Balance the equation:

Fe + HCl \to FeCl_{2} + H_{2}

19.Balance the equation:

NaOH + H_{2} SO_{4} \to Na_{2} SO_{4} + H_{2} O

20.Balance the equation:

Zn + HCl \to ZnCl_{2} + H_{2}

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Worked Example

Problem: Balance: Fe + O₂ → Fe₂O₃

Put 4 Fe on the left, 2 Fe₂O₃ on the right.— 4 Fe = 2 × 2 Fe. Iron is balanced.
Right side has 2 × 3 = 6 O. Put 3 O₂ on the left.— 3 × 2 = 6 O. Oxygen is balanced.
Verify: 4 Fe + 3 O₂ → 2 Fe₂O₃— Left: 4 Fe, 6 O. Right: 4 Fe, 6 O. ✓

Answer: 4 Fe + 3 O₂ → 2 Fe₂O₃

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