What makes iodine turn clear

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Why does iodine solution turn transparent on adding base? Asked 3 years, 8 months ago. Active 3 years, 8 months ago. Viewed 7k times. Improve this question. Gaurang Tandon 8, 10 10 gold badges 55 55 silver badges bronze badges. Soura Soura 1 1 silver badge 7 7 bronze badges. I tried googling the topic but could not find a relevant result. So I posted the question here to understand the underlying chemistry.

Elementary School. Physical Science. Earth and Environmental Science. Behavioral and Social Science. Ask an Expert: vit c test Moderator: berkeleywebs. Quick links. My experiment used starch and iodine that was purple or blue then turned clear.

I read Gabby's question is mine the reverse? How do I explain this. Indicators are chemicals that make observable changes when exposed to other chemicals. In this case, iodine can bind to ascorbic acid the vitamin C , which turns the iodine particles clear. This experiment is a science demonstration, meaning that there is no critical thinking applied to this activity. However, by making a few adjustments to the activity you can turn it into a true science experimet or STEM activity.

Kids can ask questions like, how much vitamin C is necessary to turn X amount of iodine clear, or how long will it take the vitamin C to turn the iodine clear. You can also explore whether it is possible to turn the iodine back to brown or another color again by adding another material. STEM activities are all about letting children guide their own curiosities within the scientific framework. Box Pack of 4.