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Direct linkYe, Jianqiang; Lu, Shanshan; Bi, Hualin – Chemistry Education Research and Practice, 2019
This study uses graphs of conductivity measured by a microcomputer-based laboratory (MBL) to promote students' macro, micro, and symbolic representations when learning about net ionic reactions (NIR). A total of 54 students, aged 14-15 years old participated in this research, and were randomly divided into an experimental group (N = 27) and a…
Descriptors: Science Instruction, Science Laboratories, Scientific Concepts, Concept Formation
Peer reviewedRayner-Canham, Geoff – Journal of College Science Teaching, 1993
Presents historical background and modern explanations for the popular demonstration of showing conductivity of solutions through the insertion of a light-bulb conductivity tester into deionized water and water with salt in it. (PR)
Descriptors: Chemistry, College Science, Demonstrations (Educational), Electricity
Peer reviewedSpielberg, N. – American Journal of Physics, 1973
Descriptors: College Science, Demonstrations (Educational), Electricity, Instructional Materials
Peer reviewedSievers, Dennis, Ed. – Journal of Chemical Education, 1986
Describes apparatus for use in high school chemistry instruction. Provides instructions and lists of materials needed for building a homemade sand bath for use in experiments that demonstrate the slow evaporation of a solvent. Plans for the construction of a low-cost conductivity apparatus are also included. (TW)
Descriptors: Chemical Reactions, Chemistry, Demonstrations (Educational), Electric Batteries
