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Direct linkTianli Han; Shanshan Yang; Liying Zhu; Xirong Lin; Jinyun Liu – Journal of Chemical Education, 2023
An experimental design by combining hydrogel and ethylenediaminetetraacetic acid disodium salt (EDTA) for visually displaying chemical complexation reactions is developed. The Na[superscript +] ions on the [alpha]-l-guluronic acid (G) unit of the sodium alginate molecule undergo an ion exchange with a divalent cation, so that the G units are…
Descriptors: Chemistry, Science Education, Teaching Methods, Science Experiments
