Divide calcium chloride solution among 30 labeled cups. Divide sodium alginate solution among 30 labeled cups. Provide each student with a calcium chloride cup, a sodium alginate cup, a syringe, a ...

Cut and mixed with water to make a thick gel. Diluted with more water and filtered. Mixture evaporated and further processed to make sodium alginate powder.

In autumn 2022, Nishihira playfully dipped his finger into an aqueous solution of sodium alginate and then into an aqueous solution of calcium chloride—and found the digit tightly covered by a ...