Beer's law – concentration and light absorbance of coloured solutions
Integrated ScienceMatter & MaterialsAges 13–14
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Sign in to playConcentration screen: add solute or water to a beaker (hold the tap to pour) and watch the molar concentration and the solid that settles once the solution is saturated. Beer's Law screen: shine a light beam through a cuvette of coloured solution, change the concentration, path length and wavelength, read the absorbance (A) or transmittance (%T), record data and view the graph of A against concentration. Adapted from the "Beer's Law Lab" simulation by PhET Interactive Simulations, University of Colorado Boulder (CC BY 4.0); rewritten.
Lesson: Solutions and concentration
How to use
Parameters you can change
- Screen Concentration, Beer's Law
- Solution Copper(II) sulfate (CuSO₄) — blue, Potassium permanganate (KMnO₄) — purple, Potassium dichromate (K₂Cr₂O₇) — orange, Nickel(II) chloride (NiCl₂) — green
- Cuvette path length 0.5–2 cm
- Show graph of A against concentration (Beer's Law screen)
