What is cacl2 and how is it commonly used to melt ice on sidewalks?

Calcium chloride (CaCl2) is a chemical compound commonly used to melt ice on sidewalks. It works by lowering the freezing point of water, causing ice to melt at lower temperatures. When CaCl2 is spread on icy surfaces, it absorbs moisture from the air and creates a brine solution that helps break down the ice, making it easier to remove.