What it is about?

"Hot ice" refers to a popular chemical demonstration in which a solution of sodium acetate dissolved in water and placed in a freezer instantly solidifies when poured from its container or when a single crystal of solid sodium acetate is dropped into the solution. The solidification process releases heat and thus gives the appearance of the formation of hot ice. Chemistry instructors use this to demonstrate the phenomenon of supersaturating, or the ability of some solutions to contain more dissolved material than they normally should.

In chemistry, the term "compound" refers to a material comprised of more than one chemical element. For example, table salt, also known as sodium chloride, contains sodium and chlorine atoms. When the compound contains both a metal and a nonmetal--as distinguished on the periodic table of the elements--chemists refer to the compound as "ionic." Some ionic compounds dissolve in water, and during the dissolution process the positively charged metal, called a cation, separates from the negatively charged nonmetal, called an anion. The process of precipitation represents the opposite of this process; that is, the cation and anion combine to form solid crystals in the solution. The precipitation of a solid from a solution results in decrease in the disorder of the system. That is, in the solution the ions move freely in random directions and therefore exhibit high disorder. When the ions combine to form solid crystallites, their freedom of motion becomes restricted. Scientists describe this as a decrease in the entropy, or disorder, of the system.

SCIENCE FAIR

HOT ICE

Explanation

In conclusion we invite you to demonstrate you what you can make wit sodium acetate, and if you have a party and you want to make a status you can make it with this.

Conclusion

Procedure & Ingredients

First you need to put water on a pan. When the water start to boil you put sodium acetate, but you need to put a lot of sodium. Then you dissolve it on the pan. After is all dissolve you put the water with sodium in a glass. Put it on the fridge for 15 to 30 minutes. Then you put it on a small glass bowl, then you touch it, or mix it with the finger, but you need to have a little bit of sodium in the finger and it started to make hot ice.

What is going to happen is that you will have hot ice and you can make shapes, figures or status with ice.

Members

What is going to happen? Cecilia González Paulina Martínez Laura Sofía

Sánchez Montse García

SODIUM

ACETATE

PAN

WATER