Questions and Answers
What are the coefficients for the balanced equation CaO + H₂O --> Ca(OH)₂?
What are the coefficients for the balanced equation Na + F₂ --> NaF?
2, 1, 2
What are the coefficients for the balanced equation K + I₂ --> KI?
2, 1, 2
What are the coefficients for the balanced equation MgO + SO₃ --> MgSO₄?
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What are the coefficients for the reaction C + O₂ --> CO₂?
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What are the coefficients for the balanced equation Al₂(SO₄)₃ + Ca(OH)₂ --> Al(OH)₃ + CaSO₄?
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What are the coefficients for the balanced equation Na + MgF₂ --> NaF + Mg?
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What are the coefficients for the balanced equation BaCl₂ + Na₂SO₄ --> NaCl + BaSO₄?
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What are the coefficients for the balanced equation LiCl + Mg(NO₃)₂ --> LiNO₃ + MgCl₂?
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What are the coefficients for the balanced equation Al + Cu(NO₃)₂ --> Cu + Al(NO₃)₃?
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What are the coefficients for the balanced equation Mg + Cl₂ --> MgCl₂?
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What are the coefficients for the balanced equation CO + O₂ --> CO₂?
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What are the coefficients for the balanced equation Cu + HCl --> CuCl₂ + H₂?
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What are the coefficients for the balanced equation Mg + O₂ --> MgO?
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What are the coefficients for the balanced equation Sn + HF --> SnF₂ + H₂?
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What are the coefficients for the balanced equation Mg + HCl --> MgCl₂ + H₂?
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What are the coefficients for the balanced equation C + O₂ --> CO₂?
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What are the coefficients for the balanced equation Fe + O₂ --> Fe₂O₃?
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What are the coefficients for the balanced equation CS₂ + O₂ --> CO₂ + SO₂?
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What are the coefficients for the balanced equation MgS + O₂ --> MgO + SO₂?
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What are the coefficients for the balanced equation NaOH + CO₂ --> Na₂CO₃ + H₂O?
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What are the coefficients for the balanced equation Mg + HF --> MgF₂ + H₂?
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What are the coefficients for the balanced equation N₂ + O₂ --> NO?
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What are the coefficients for the balanced equation H₂ + O₂ --> H₂O?
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What are the coefficients for the balanced equation PCl₃ + Cl₂ --> PCl₅?
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What are the coefficients for the balanced equation Al + Cl₂ --> AlCl₃?
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What are the coefficients for the balanced equation Mg + AlCl₃ --> MgCl₂ + Al?
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What are the coefficients for the balanced equation SO₂ + O₂ --> SO₃?
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What are the coefficients for the balanced equation K + H₂O --> KOH + H₂?
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What are the coefficients for the balanced equation Cu + Cl₂ --> CuCl₂?
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What are the coefficients for the balanced equation Al + O₂ --> Al₂O₃?
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Study Notes
Chemical Equations Overview
- Balancing chemical equations ensures the conservation of mass, indicating the same number of each type of atom on both sides of the equation.
- Chemical equations can be expressed in word form or using chemical symbols.
Examples of Balanced Equations
- CaO + H₂O → Ca(OH)₂: Fully balanced with one mole of each reactant and product.
- Na + F₂ → NaF: Requires 2 sodium and 1 fluorine to produce 2 sodium fluoride.
- K + I₂ → KI: Balancing reveals that 2 potassium atoms react with 1 iodine molecule to yield 2 KI.
Detailed Balancing Examples
- MgO + SO₃ → MgSO₄: Balanced as written without additional coefficients.
- C + O₂ → CO₂: Balanced formula with 1 carbon and 2 oxygen yielding 1 molecule of carbon dioxide.
- Al₂(SO₄)₃ + Ca(OH)₂ → Al(OH)₃ + CaSO₄: Requires 1, 3, 2, and 3 coefficients for balance.
More Complex Reactions
- Na + MgF₂ → NaF + Mg: Demonstrates the need for 2 sodium and 1 magnesium to achieve balance.
- BaCl₂ + Na₂SO₄ → NaCl + BaSO₄: Balanced with coefficients of 1, 1, 2, and 1.
Various Types of Reactions
- LiCl + Mg(NO₃)₂ → LiNO₃ + MgCl₂: Requires 2, 1, 2, and 1 for proper balance.
- Al + Cu(NO₃)₂ → Cu + Al(NO₃)₃: Balanced with coefficients of 2, 3, 3, and 2.
Simple Reactions
- Mg + Cl₂ → MgCl₂ and C + O₂ → CO₂ are simple and already balanced.
- CO + O₂ → CO₂: Requires 2 moles of CO to react with 1 mole of O₂.
Redox and Other Reactions
- Cu + HCl → CuCl₂ + H₂: Requires coefficients of 1, 2, 1, and 1.
- Fe + O₂ → Fe₂O₃: Needs a balancing of 4, 3, 2 for iron oxide formation.
- CS₂ + O₂ → CO₂ + SO₂: Balanced with 1:3:1:2 ratio for all compounds involved.
Formation and Decomposition
- MgS + O₂ → MgO + SO₂: Requires 2, 3, 2, and 2 for balance.
- NaOH + CO₂ → Na₂CO₃ + H₂O: Balances with 2, 1, 1, and 1.
Additional Reactions
- N₂ + O₂ → NO: Requires coefficients of 1 each and produces 2 NO.
- H₂ + O₂ → H₂O: Balances at 2, 1, 2 with the formation of water.
- PCl₃ + Cl₂ → PCl₅: Balanced without requiring any additional coefficients.
- Al + Cl₂ → AlCl₃: Requires 2, 3, 2 for proper coherence.
Advanced Balancing
- Mg + AlCl₃ → MgCl₂ + Al: Requires a balanced ratio of 3, 2, 3, and 2.
- SO₂ + O₂ → SO₃: Balancing requires 2 moles of SO₂ reacting with 1 mole of O₂.
Key Takeaways
- Balancing equations is essential for understanding stoichiometry and chemical reactions.
- Coefficients indicate the number of moles required for each substance involved in the reaction.
Studying That Suits You
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Description
Test your understanding of balancing chemical equations with these flashcards. Each card presents a chemical reaction, and you'll determine whether it is balanced or the correct coefficients needed. Perfect for chemistry students looking to enhance their skills!
