Lesson Plan

Introduction to the Mole

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Objectives

In this lesson, students learn why and how the mole is used in chemistry. Students will:

  • calculate the formula weights of various compounds.
  • apply the mole concept to representative particles by determining the mass of atoms, molecules, ions, and formula units.
  • perform mass-mole conversions.
  • conduct a laboratory activity to calculate and determine if a mole of pennies would fit inside the classroom.


Essential Questions

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Vocabulary

  • Atomic Mass: The mass in atomic mass units (amu) of one mole of a substance.
  • Conversion Factor: A ratio equal to one that expresses the same quantity in two different ways.
  • Formula Unit: The representative particle of an ionic compound.
  • Formula Weight: The weight of a molecular compound or an ionic compound.
  • Gram-mole: The mass of one mole, or 6.02 × 1023 particles, expressed in grams.
  • Mole: The quantity of a substance that has a weight, measured in grams, that is numerically equal to the molecular weight of that substance. Expressed as 6.02 × 1023 particles (Avogadro’s number); mol is used in equations, mole is used in writing.
  • Molar Mass: The sum of all the atomic masses in a molecule or compound; the mass in grams of one mole of a substance.
  • Representative Particles: The atoms, molecules, ions, or formula units present in a substance.


Duration

90 minutes/2 class periods


Prerequisite Skills


Materials


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Related Materials & Resources

The possible inclusion of commercial websites below is not an implied endorsement of their products, which are not free, and are not required for this lesson plan.

  • How Big Is a Mole?

www.wired.com/wiredscience/2010/10/how-big-is-a-mole/

  • The World of Chemistry (video on the mole concept)

www.learner.org/vod/vod_window.html?pid=803 

  • Mole Song (“A Mole is a Unit”)

www.youtube.com/watch?v=1R7NiIum2TI

  • Happy Mole Day to You Song

http://www.teachertube.com/viewVideo.php?video_id=41557

  • Table of Atomic Weights (in alphabetical order and in order of atomic number)

www.medicinescomplete.com/mc/merck/2010/AtomicWeights.pdf

  • The Mole Concept (Avogadro’s Number)

www.iun.edu/~cpanhd/C101webnotes/quantchem/moleavo.html

  • Mole Toons (mole cartoons)

http://boomeria.org/chemlectures/moltoons/moletunes.html



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