Questions and Answers
Is the following chemical equation balanced? 2Na + F₂ → 2NaF
False
Is the following chemical equation balanced? 2K + 2I₂ → 2KI
False
Is the following chemical equation balanced? BaCl₂ + Na₂SO₄ → NaCl + BaSO₄
False
Is the following chemical equation balanced? CH₄ + 2O₂ → CO₂ + 2H₂O
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Is the following chemical equation balanced? 2Na + MgF₂ → 2NaF + Mg
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Is the following chemical equation balanced? 2LiCl + Mg(NO₃)₂ → 2LiNO₃ + 2MgCl₂
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Is the following chemical equation balanced? 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
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Is the following chemical equation balanced? 2C + O₂ → CO₂
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Is the following chemical equation balanced? 2CO + O₂ → 2CO₂
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Is the following chemical equation balanced? Cu + 2HCl → CuCl₂ + 2H₂
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Is the following chemical equation balanced? C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
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Is the following chemical equation balanced? 2Mg + Cl₂ → MgCl₂
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Is the following chemical equation balanced? 2Mg + O₂ → 2MgO
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Is the following chemical equation balanced? 2Sn + 2HF → SnF₂ + H₂
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Is the following chemical equation balanced? Mg + 2HCl → MgCl₂ + H₂
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Is the following chemical equation balanced? 2C₄H₁₀ + 10O₂ → 8CO₂ + 10H₂O
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Is the following chemical equation balanced? C + O₂ → CO₂
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Is the following chemical equation balanced? 4Fe + 3O₂ → 4Fe₂O₃
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Is the following chemical equation balanced? CS₂ + 3O₂ → CO₂ + 2SO₂
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Is the following chemical equation balanced? 2MgS + 2O₂ → 2MgO + 2SO₂
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Is the following chemical equation balanced? C₅H₁₂ + 8O₂ → 5CO₂ + 6H₂O
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Is the following chemical equation balanced? MgO + 4SO₃ → MgSO₄
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Is the following chemical equation balanced? 2NaOH + CO₂ → Na₂CO₃ + H₂O
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Is the following chemical equation balanced? Mg + 2HF → MgF₂ + 2H₂
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Is the following chemical equation balanced? N₂ + O₂ → 2NO
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Is the following chemical equation balanced? PCl₃ + 2Cl₂ → PCl₅
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Is the following chemical equation balanced? 2H₂ + O₂ → 2H₂O
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Is the following chemical equation balanced? 2Al + 2Cl₂ → 2AlCl₃
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Is the following chemical equation balanced? 3Mg + 2AlCl₃ → 3MgCl₂ + 2Al
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Is the following chemical equation balanced? C₇H₁₆ + 8O₂ → 7CO₂ + 8H₂O
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Is the following chemical equation balanced? Cu + Cl₂ → CuCl₂
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Is the following chemical equation balanced? 2SO₂ + 3O₂ → 2SO₃
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Is the following chemical equation balanced? 2K + 2H₂O → 2KOH + H₂
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Is the following chemical equation balanced? 2Al + 3O₂ → 2Al₂O₃
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Is the following chemical equation balanced? 2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O
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Study Notes
Chemical Equations Overview
- Balanced equations have equal numbers of each type of atom on both sides, adhering to the law of conservation of mass.
Examples of Balanced Equations
- 2Na + F₂ → 2NaF: Balanced equation; 2 sodium atoms and 2 fluorine atoms on both sides.
- CH₄ + 2O₂ → CO₂ + 2H₂O: Balanced; carbon and hydrogen atoms are equal on both sides.
- 2Na + MgF₂ → 2NaF + Mg: Balanced; maintains atom count across reactants and products.
- 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O: Balanced; every atom matches corresponding reactants and products.
- 2CO + O₂ → 2CO₂: Balanced reaction with equal carbon and oxygen atoms.
Examples of Unbalanced Equations
- 2K + 2I₂ → 2KI: Not balanced; iodine atoms differ on both sides.
- BaCl₂ + Na₂SO₄ → NaCl + BaSO₄: Unbalanced due to differing sodium and chloride counts.
- Cu + 2HCl → CuCl₂ + 2H₂: Not balanced; hydrogen and chlorine atoms don't match.
- 2C + O₂ → CO₂: Not balanced; carbon atoms aren't equal.
- 2Mg + Cl₂ → MgCl₂: Unbalanced due to chlorides not matching.
Additional Cases
- C + O₂ → CO₂: Balanced equation; equal count of carbon and oxygen.
- 2H₂ + O₂ → 2H₂O: Fully balanced; both hydrogen and oxygen counts line up.
- 2K + 2H₂O → 2KOH + H₂: Balanced; potassium, hydrogen, and oxygen atoms match.
Common Errors
- Misalignment in the number of reactants and products often causes unbalanced equations, failing the conservation of mass principle.
- Always verify atom counts for all reactants and products to determine balance.
Importance of Balancing
- Balancing chemical equations is crucial for predicting the outcomes of reactions and ensuring accurate calculations in stoichiometry.
- Understanding balance helps in demonstrating the conservation of matter in chemical reactions.
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Description
Test your understanding of balancing chemical equations with this quiz. Determine whether the given chemical equations are balanced or not. Improve your skills and knowledge in chemistry through these thought-provoking questions.
