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How many molecules in a name?
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Students design and carry out a procedure to find the number of formula units of chalk (calcium carbonate) needed to write their name on a chalkboard.

Subject:
Chemistry
Science
Material Type:
Activity/Lab
Date Added:
01/15/2019
Molarity
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CC BY
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What determines the concentration of a solution? Learn about the relationships between moles, liters, and molarity by adjusting the amount of solute and solution volume. Change solutes to compare different chemical compounds in water.

Subject:
Chemistry
Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Chris Malley
Julia Chamberlain
Kathy Perkins
Kelly Lancaster
Robert Parson
Date Added:
02/20/2012
Sugar and Salt Solutions
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CC BY
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What happens when sugar and salt are added to water? Pour in sugar, shake in salt, and evaporate water to see the effects on concentration and conductivity. Zoom in to see how different sugar and salt compounds dissolve. Zoom in again to explore the role of water.

Subject:
Chemistry
Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Emily Moore
Julia Chamberlain
Kathy Perkins
Kelly Lancaster
Robert Parson
Sam Reid
Trish Loeblein
Date Added:
10/12/2011
pH Scale (AR)
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Test the pH of things like coffee, spit, and soap to determine whether each is acidic, basic, or neutral. Visualize the relative number of hydroxide ions and hydronium ions in solution. Switch between logarithmic and linear scales. Investigate whether changing the volume or diluting with water affects the pH. Or you can design your own liquid!

Subject:
Chemistry
Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Archie Paulson
Chris Malley
Jack Barbera
Kathy Perkins
Laurie Landgon
Patricia Loblein
Wendy Adams
Date Added:
07/02/2012