@chemicalkim: Lighting Things Up With Ions in Solution #Chemistry When ions dissolve in water, they separate and move freely, creating an electric current that a conductivity tester can detect. The tester’s lightbulb lights up when ions are present, because they allow electricity to flow through the solution. The brighter the bulb, the more ions there are, indicating higher conductivity. Shout out to Flinn Scientific for providing this awesome conductivity tester that makes demonstrating this concept easy and engaging! #TikTokPartner #TikTokPride