S - Mass to Mass Practice with Percent Yield (Lesson)

Mass to Mass Practice with Percent Yield

Introduction

Mole-mole and mole-mass calculations are not the only type of stoichiometry calculations that may be accomplished using balanced chemical equations. Recall that the molar mass can be determined from a chemical formula and used as a conversion factor. We can add one more step in mole-mass calculations to convert from the mass of one substance to the mass of another using another molar mass conversion factor. These mass to mass calculations prove to be very valuable because we do not have instruments to measure moles of substances in the lab.

Mass/Mass Conversion and Percent Yield

Let’s take a closer look at Mass/Mass conversions and percent yield calculations in the segment of GPB’s Chemistry Matters.

Refer to this image to set up Mass/Mass conversion problems. Remember, this should guide you in setting up the problem, but ultimately you should let the units be your guide.

Mass to Mass Conversion Chart Set Up Practice

Mass/Mass Stoichiometry Practice Problems

For more practice with Mass/Mass Conversions, download the following practice problems and corresponding answer key.

Download the Percent Yield Calculations Handout. Links to an external site.

Download the Percent Yield Calculations Handout Key. Links to an external site.

Percent Yield

Steps for percent yield problem solving: The percent yield may be more or less than 100%. This is due to experimental error and is acceptable.

Percent Yield Practice Problems

IMAGES CREATED BY GAVS OR FREE TO USE