Balancing Reactions
Balance:
H₂ + O₂ → H₂O
2H₂ + O₂ → 2H₂O
Na + Cl₂ → ?
Answer: NaCl
C₄H₁₀ + O₂ → CO₂ + H₂O
Answer: Combustion
What is the Bond type: NaCl
Answer: Ionic
What law states that matter is not created or destroyed in a reaction?
Answer: Law of Conservation of Mass
Balance:
Na + Cl₂ → NaCl
Answer: 2Na + Cl₂ → 2NaCl
Ca + H₂O → ?
Answer: Ca(OH)₂ + H₂
2H₂ + O₂ → 2H₂O
Answer: Synthesis
What is the Bond type: CO₂
Answer: Covalent
True or False: You can change subscripts when balancing equations.
Answer: False
Balance:
Al + O₂ → Al₂O₃
Answer: 4Al + 3O₂ → 2Al₂O₃
HCl + NaOH → ?
Answer: NaCl + H₂O
Na₂SO₄ + BaCl₂ → BaSO₄ + 2NaCl
Answer: Double Replacement
Bond the following compounds
Mg²⁺ and Cl⁻
Answer: MgCl₂
True or False: Only coefficients can be changed when balancing equations.
Answer: True
Balance:
Fe + H₂O → Fe₃O₄ + H₂
Answer: 3Fe + 4H₂O → Fe₃O₄ + 4H₂
AgNO₃ + NaCl → ?
Answer: AgCl + NaNO₃
Zn + CuSO₄ → ZnSO₄ + Cu
Answer: Single Replacement
What bond will from between the following?
Al³⁺ and O²⁻
Answer: Al₂O₃
Will this reaction occur?
Cu + AgNO₃ → CuNO₃ + Ag
Answer: Yes (single replacement occurs)
Balance:
C₃H₈ + O₂ → CO₂ + H₂O
Answer: C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
K₂CO₃ + HCl → ?
Answer: KCl + H₂O + CO₂
2KClO₃ → 2KCl + 3O₂
Answer: Decomposition
Bond the following elements:
Sulfer and Oxygen
Answer: SO₂
Will this reaction occur?
Ag + ZnSO₄ → Ag₂SO₄ + Zn
Answer: No reaction (activity series — Ag cannot replace Zn)