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Mixing Molecules

Originally commission for the NISE Network for their museum collection on nanotechnology. This piece demonstrates how diffusion and local concentrations determine reaction rates. Two sources of reagents produce diazonium salt and dimethylaniline which diffuse away from the sources. When two molecules of the reagents find each other, they react to produce methyl orange in an exothermic reaction. Using their shadow, participants can keep the reagents separated or push them together to increase the local concentration. When two highly concentrations of the reagents come together, POW!, a very violent reaction results.

(c) 2010 Mine-Control, Inc.