Samantha+Marzka

= = **// WHY DOES SALT HELP MELT ICE? //**
 * By Samantha Marzka **


 * [[image:http://www.askdeb.com/home/ice/salts-melt-ice.jpg width="227" height="243" align="left" caption="Ice melted by Salt"]]Water freezes at 32 degrees Fahrenheit or 0 degrees Celsius. Salt causes a freezing point depression when it dissolves which lowers the freezing point to below 0 degrees Celsius. Salt bonds with water molecules which makes it harder for ice to form, because the freezing point is lowered. When you put salt on ice it immediately melts where the salt is touching the ice. In order to melt ice with salt there must be a thin layer of water on the ice for the salt to react with. [[image:http://img.timeinc.net/recipes/i/articles/ck/icecream-ck-0607-tout-x.jpg width="276" height="230" align="right" caption="Putting Salt on Ice to make ICE CREAM!"]]This concept can be used when making ice cream at home. The milk in the ice cream freezes at a temperature lower then 0 degrees Celsius so adding salt to the ice surrounding the ice cream lowers the temperature of the ice which freezes the ice cream. **



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