- Is left over after the reaction is complete
- Is fully used up in the reaction
- Is not part of the reaction
- Speeds up the reaction
Category: Limiting and Excess Reactants
- H₂
- O₂
- H₂O
- Both are in stoichiometric ratio
- Excess reactant
- Limiting reactant
- Catalyst used
- Product actually formed
- The most expensive
- Present in the greatest amount
- Completely consumed first
- The least reactive
