Here's how it works:
1. Balanced Chemical Equation: The coefficients in a balanced chemical equation represent the number of moles of each reactant and product involved in the reaction.
2. Mole Ratio: The ratio of these coefficients represents the mole ratio between any two substances in the reaction.
3. Conversion: You can use this mole ratio to convert moles of one substance to moles of another substance.
Example:
Consider the combustion of methane:
CH₄ + 2O₂ → CO₂ + 2H₂O
* Mole Ratio: The mole ratio between methane (CH₄) and carbon dioxide (CO₂) is 1:1. This means for every 1 mole of CH₄ consumed, 1 mole of CO₂ is produced.
* Conversion: If you have 2 moles of CH₄, you can calculate the moles of CO₂ produced by multiplying by the mole ratio: 2 moles CH₄ * (1 mole CO₂ / 1 mole CH₄) = 2 moles CO₂
In summary, stoichiometry uses the mole ratio derived from the balanced chemical equation to establish a quantitative relationship between the moles of different reactants and products in a chemical reaction.
