10/14/22 - Chemical Equation Components Flashcards
What is the limiting reagent?
The reactant that limits the amount of product that forms. It is fully used up in a chemical reaction.
What is the excess reagent?
The reactant that will have some left over.
What is the theoretical yield?
The maximum amount of product that can be made.
What is the actual yield?
The amount of product actually obtained in a reaction.
What is the percent yield?
The percentage of the theoretical yield that is actually produced.
% yield = (actual yield)/(theoretical yield)
How do you find the maximum mass of a product that can be produced in a reaction when given the masses of the reactants?
1) Write balanced chemical equation
2) Divide reactant masses by their molar masses to find their moles
3) Determine limiting reagent: Multiply moles of each reactant by the ratio of the stoichiometric coefficients of that reagent and the given product.
4) Find number of moles of the product that result from the limiting reagent. Multiply moles of limiting reagent by ratio of stoichiometric coefficients.
5) Convert moles to mass.
