Universal Indicator Next to Ammonia
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URL (link address) for this media:
http://dvaction.northwestern.edu/dvaction/movies/reference/ui-09-ref.mov

Drop one drop of universal indicator. Place a drop of aqueous ammonia next to the universal indicator drop. Note the change in color of the drop of universal indicator. For comparison, place another drop of universal indicator to the right of the first universal indicator drop. The color differences are subtle and more obvious to the human eye than the video camera.