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A 100mm petri dish containing water is placed on an overhead projector. When solid Pb(NO3)2 is place on one side and solid KI on the other, PbI2 precipitates in the center. Pb(NO3)2(aq) + 2KI(aq) β PbI2(s) + 2KNO3(aq) To Conduct Demonstration
Demo Time: ~1 minute SafetyPb(NO3)2 is toxic. Care should be taken to avoid breathing KI dust. AcknowledgmentMargaret Asirvatham & Lyn Pierce, Summer 1987 |