Limiting Reagents, Percent Yield, and Gas Stoichiometry

Vocabulary flashcards covering limiting reagents, excess reagents, theoretical and percent yield, and gas stoichiometry at STP.

Limiting Reagent (LR)

The reactant that will limit the reaction by running out first, producing the least amount of product.

Excess Reagent (ER)

The reactant in a chemical reaction of which you have more than you need, remaining after the limiting reagent is consumed.

Theoretical Yield

The maximum amount of product that could be made, calculated based on the limiting reagent assuming the reaction proceeds perfectly at $100\%$.

Percent Yield

The percentage of actual output produced in a chemical reaction compared to the theoretical yield.

Density (in Gas Stoichiometry)

A conversion factor that relates the mass of a substance to its volume by stating the number of grams that is equal to $1\,\text{L}$.

Standard Temperature and Pressure (STP)

The set of standard reaction conditions defined by a temperature of $0^\circ\text{C}$ and a pressure of $1\,\text{atm}$.

Molar Volume at STP

The volume occupied by one mole of any gas at standard temperature and pressure, which is equal to $22.4\,\text{L}$ ($1\,\text{mol} = 22.4\,\text{L}$).