Discover Beer’s law using this interactive simulation. Investigate concentration and test the transmission and absorption of light with different solutions.

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Additional information

PhET sims are fun, interactive, research-based simulations of physical phenomena developed by the PhET™ project at the University of Colorado. Conversion to HTML5 and tablet compatibility supported by the Royal Society of Chemistry.

Sample Learning Goals:

  • Describe the relationships between volume and amount of solute to solution concentration.
  • Explain qualitatively the relationship between solution color and concentration.
  • Predict and explain how solution concentration will change for adding or removing: water, solute, and/or solution.
  • Calculate the concentration of solutions in units of molarity (mol/L).
  • Design a procedure for creating a solution of a given concentration.
  • Identify when a solution is saturated and predict how concentration will change for adding or removing: water, solute, and/or solution.
  • Describe the relationship between the solution concentration and the intensity of light that is absorbed/transmitted.
  • Describe the relationship between absorbance, molar absorptivity, path length, and concentration in Beer’s Law.
  • Predict how the intensity of light absorbed/transmitted will change with changes in solution type, solution concentration, container width, or light source, and explain why.