What color is iodine mixed with calcium carbonate?

When iodine is mixed with calcium carbonate, the iodine typically appears as a violet or dark purple color due to its molecular form. However, the calcium carbonate itself is white, so the overall appearance of the mixture can vary depending on the amount of iodine used. If the iodine is in excess, the mixture will have a prominent purple hue, while smaller amounts may result in a more subdued color.