Question

Define fractional conversion and limiting reactant

Answer 1

The fractional excess of the reactant is the ratio of the excess to the stoichiometric requirements. Fractional excess of A =[ (moles A)feed – (moles A)stoich]/(moles A)stoich. The extent of reaction is a quantity used to determine how much a reactant reacted. Fractional conversion = moles reacted/moles fed.

The limiting reagent (or limiting reactant, LR) in a chemical reaction is the substance that is totally consumed when the chemical reaction is complete. The amount of product formed is limited by this reagent, since the reaction cannot continue without it.