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first-year undergraduate

DAVID LICATA's picture

Writing Conversion Factors

Sat, 11/15/2014 - 23:01 -- DAVID LICATA
Writing Conversion Factors Preview

This worksheet is intended to be used as a "Guided Instructional Activity" (GIA). Students read a statement that gives a either a conversion factor or a pair of related measures and then write the information as two equivalent fractions ("conversion factors") and as an equality. In each representation, students are directed to give the numeral of the measure, unit, and identity of the chemical.

Time required: 

35 to 45 minutes.

DAVID LICATA's picture

Stoichiometry Guided Instructional Activities with Guide Framework

Sat, 11/08/2014 - 21:40 -- DAVID LICATA
Initial framework for use with stoichiometry GIAs

This set of three worksheets are intended to be used as collaborative "Guided Instructional Activities" (GIAs). Two students cooperate to complete the steps of a stoichiometry problem, alternately doing parts of the process as they explain what they are doing and evaluate their partner's work. These worksheets emphasize an algorothmic approach that helps students learn to think aobut the purpose of a question, organize their work, set it up so that it is easily readable and can be followed by others, and make good use of "unit analysis" (dimensional analysis).

Time required: 

Each of the activity worksheets requires 40 to 55 minutes.

DAVID LICATA's picture

Mole Conversion Guided Instructional Activities

Fri, 11/07/2014 - 23:37 -- DAVID LICATA
Mole Converstion Guided Instructional Activity Preview

The three "Guided Instructional Activities" in this activity are three cooperative learning pieces in which students are guided through the process of converting from one unit to moles (or moles to a unit) by the method of "unit analysis" (dimensional analysis). Students alternate steps in the process and evaluate the success of each step. They must do things such as writing the given information correctly, finding the correct molar mass, setting up the mathematics correctly, and determining the answer to a required number of significant figures.

Time required: 

Each of the activities requires about 40 to 55 minutes. The first one used usually takes longer, the last goes quicker.

DAVID LICATA's picture

Mole Conversions: 1- & 2-step with format

Wed, 11/05/2014 - 19:52 -- DAVID LICATA
Screenshot of a portion of the worksheet

This worksheet asks students to do basic conversions of mass or molecules to moles and vice versa. The worksheet requires students to complete their work in a particular format and to inlcude number, unit, and chemical identity for each item in the "given," in each conversion factor, and in the answer. It gives students basic practice in this mathematical exercise while inforcing good habits that encourage "unit analysis" (or dimensional analysis).

Time required: 

This worksheet can be used as an in-class or as a homework assignment. The ten items on the first page should take 20 to 30 minutes. The ten items on the second page should take 30 to 50 minutes.

Tom Kuntzleman's picture

Solution to Chemical Mystery #3: The Sour Side of Chemistry!

Mon, 09/22/2014 - 15:17 -- Tom Kuntzleman

Congratulations to Grazyna Zreda who solved the Chemical Mystery of the Mentos candies! To conduct this trick, two white Mentos candies are placed in separate beakers that both contain universal indicator. One of the Mentos candies turns the indicator slightly green, indicating the presence of base.

Doug Ragan's picture

Compound Interest

Tue, 03/04/2014 - 21:09 -- Doug Ragan

Have you ever been curious about the chemistry of a lemon? What about the chemical structures of adrenaline, dopamine, or serotonin? Would you like to share with your students the elements that make up their smartphone? Or what how about a beautiful “infographic” representing each of the families of the periodic table? Then Compound Interest at www.compoundchem.com has you covered and then some.


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