The Mole ConceptBefore you can do stoichiometry, you have to understand the use of the mole as a counting unit. This first video explains what a mole (not the furry animal) is.
|
Now that you know what a mole is, let's see how it is used as a counting tool. The video below explains how the mole can be used to count.
|
Mole Conversions
The videos below explain how to convert between moles, atoms, and molecules. Tyler DeWitt has several more videos on this topic which you can to to YouTube and watch if you would like. The next section of this page will show you how to use a mole map to help you speed up these conversions.
|
|
Mole Map
The mole map is a powerful tool to help you carry out calculations involving the mole using conversion factors. It is really helpful for helping you determine what your next step needs to be when converting. The video below shows a complete mole map with several worked examples.
|
Stoichiometry
Stoichiometry is useful because it allows us to calculate quantities like how much reactant is needed to make a certain amount of product or how much product can be made with the reactants you have on hand. The video below explains step-by-step how to carry out calculations that use the coefficients in a balanced chemical reaction.
|
You may find the mole map below useful. It is essentially the same as the mole map in the mole map video on this page except it shows where the coefficients from the balanced chemical reaction go to perform the mole-to-mole conversion.
|
Theoretical and Percent Yield
Both of the videos below explain how to calculate theoretical and percent yield. The term excess reagent is used in both. If you want to know more about what the excess reagent is, watch the next set of videos on this page about limiting and excess reagents.
|
|
Limiting and Excess Reagents
The video below introduces the concepts of limiting and excess reactants.
The video below shows a more complicated limiting reactant problem worked out.
|
The video below has a simple limiting reactant problem.
|
Mass-Mole Conversion Practice www.sciencegeek.net/Chemistry/taters/Unit4MoleConversion.htm
Gram/Mole/Volume Conversions www.sciencegeek.net/Chemistry/taters/Unit4GramMoleVolume.htm
Khan Stoichiometry Practice www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/stoichiometry-ideal/e/ideal_stoichiometry
Widener.edu Stoichiometry Practice science.widener.edu/svb/tutorial/genstoichiometrycsn7.html
ScienceGeek Stoichiometry Practice www.sciencegeek.net/Chemistry/taters/Unit4Stoichiometry.htm
Stoichiometry Quizlet quizlet.com/162261496/stoichiometry-flash-cards/
Washington University Stoichiometry and LR Practice (keys available on site as well) www.chemistry.wustl.edu/~coursedev/Online%20tutorials/Plink/probsets.htm
Khan Limiting Reactant Practice www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/limiting-reagent-stoichiometry/e/limiting_reagent_stoichiometry
Widener.edu Percent Yield Practice science.widener.edu/svb/tutorial/percentyieldcsn7.html
Gram/Mole/Volume Conversions www.sciencegeek.net/Chemistry/taters/Unit4GramMoleVolume.htm
Khan Stoichiometry Practice www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/stoichiometry-ideal/e/ideal_stoichiometry
Widener.edu Stoichiometry Practice science.widener.edu/svb/tutorial/genstoichiometrycsn7.html
ScienceGeek Stoichiometry Practice www.sciencegeek.net/Chemistry/taters/Unit4Stoichiometry.htm
Stoichiometry Quizlet quizlet.com/162261496/stoichiometry-flash-cards/
Washington University Stoichiometry and LR Practice (keys available on site as well) www.chemistry.wustl.edu/~coursedev/Online%20tutorials/Plink/probsets.htm
Khan Limiting Reactant Practice www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/limiting-reagent-stoichiometry/e/limiting_reagent_stoichiometry
Widener.edu Percent Yield Practice science.widener.edu/svb/tutorial/percentyieldcsn7.html