Question

Question 1 =
Balance the following equation by adding the correct coefficients if needed:

____H2 + ____O2 → ____H2O


Enter your answer in the space provided.


Question 2
Balance the following equation by adding the correct coefficients if needed:

____Al2O3 + ____HCl → ____AlCl3 + ____H2O
Enter your answer in the space provided.


Question 3
Balance the following equation by adding the correct coefficients if needed:

____CH4 + ____O2 → ____CO2 + ____H2O

Answer 1

2 H₂ + O₂ → 2 H₂O

Al₂O₃ + 6 HCl → 2 AlCl₃ + 3 H₂O

CH₄ + 2 O₂ → CO₂ + 2 H₂O

Explanation:

To balance the chemical equations the number and type of atoms entering the reaction have to be equal to the number an type of atoms leaving the reactions. To do this we add coefficients (usually integer numbers) before each substance.

So we have the following balanced chemical reactions:

2 H₂ + O₂ → 2 H₂O

Al₂O₃ + 6 HCl → 2 AlCl₃ + 3 H₂O

CH₄ + 2 O₂ → CO₂ + 2 H₂O

Learn more about:

balancing chemical equations

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