ice is pure or mixture
Submit. Â· just now. Report Abuse. Normally, a liquid and its frozen form together would be a pure substance. However, water is a unique substance. When it freezes, unlike other substances, air mixes with the water and and the ice has increased volume as a result. This means that the water with ice in it isn't just H20, it's purely H20 in the water part and H20 + air in the ice part. Mixture, because the air is physically trapped as a part of the ice, but not in its liquid form.