Science
Molar ratios.
Definition
Molar ratios are the proportional relationships between the amounts (in moles) of reactants and products in a balanced chemical equation. They serve as conversion factors for stoichiometric calculations, allowing you to predict how much product forms or how much reactant is needed.
Examples
Real-world.
- 1 In 2H₂ + O₂ → 2H₂O, the molar ratio of H₂ to O₂ is 2:1
- 2 Using the ratio to calculate that 4 moles of H₂ requires 2 moles of O₂
- 3 Determining grams of CO₂ produced from a known mass of glucose burned
Key Fact
Molar ratios come directly from the coefficients in a balanced equation.