Molarity, Limiting Reactants, and Percent Yield

Flashcards based on lecture notes about molarity, limiting reactants, percent yield, and stoichiometry.

How do you find the molarity of a product given the liters of solution?

To find the molarity of the product, first find the moles of the product using the limiting reactant, then apply to M = moles of solute / liters of solution.

In the reaction described on page 2, which reactant is limiting?

HBr is the limiting reactant.

How do you find the energy (KJ) from the limiting reactant (LR)?

Use the limiting reactant and the ratio (KJ / mol LR).

What is the equation to calculate percent yield?

Actual yield / Theoretical yield x 100

Why is HBr the limiting reactant

HBr is the limiting reactant because the amount present is less than what is needed to fully react.

How do you find the moles of product produced?

Use mole ratio (moles of LR)

How do you calculate the excess reactant (in moles)?

Find the difference (original moles - mole ratio)

Why is HBr the limiting reactant in the example on page 6?

HBr is limiting because 0.106 moles are needed to react with all the base, but there are only 0.0714 moles of HBr.