Uploaded March 2017 | Updated September 2026, 3 weeks ago
Make colorful, worm-like gels by combining two solutions; sodium alginate (from seaweed) and the salt, calcium chloride. The calcium ions from the salt loosely bind the polymer alginate chains into a gel. With the addition of Red Cabbage Extract, students can watch the color-changing gel as it forms. Available at teachersource.com/product/alginate-worm-kit/chemistry
Make colorful, worm-like gels by combining two solutions; sodium alginate (from seaweed) and the salt, calcium chloride. The calcium ions from the salt loosely bind the polymer alginate chains into a gel. With the addition of Red Cabbage Extract, students can watch the color-changing gel as it forms. Available at teachersource.com/product/alginate-worm-kit/chemistry
