Chemical reactions
Explanation of Chemicals
Rock Salt- used to melt ice. Contains NaCl. Naturally occurring; formed next to large bodies of water.
Ice(Water)- H2O Naturally Occurring. Essential for life.
Sugar-C6H12O6 Sugar is produced when glucose and fructose are combined by condensation. Throughout the process a water molecule is removed.
Vanilla- Comes from the natural plant Vanillin. Chemical Formula is C8H8O3
Milk- Milk does not necessarily have a chemical formula. It is a colloid of butter-fat molecules with fluid that is water based. There are too many components in milk for it to have a chemical formula.
Epicenter
Using Rock Salt in Two Ways
Rock salt is commonly used for melting ice on roads and sidewalks. It can also be used for making ice cream. The rock salt forces the ice to melt. When the liquid in the smaller bag absorbs heat, the temperature in the mix lowers until it begins to freeze. However, when the salt is added, the ice will melt faster. Since the larger bag loses large amounts of heat, the mixture will eventually reach the freezing temperature of melting saltwater ice.
Procedure
Air makes up anywhere from 30% to 50% of the total volume of ice cream.The amount of air added to ice cream is known as overrun. If the volume of ice cream is doubled by adding air, then the overrun is 100%. A gallon (3.8 liters) of ice cream must weigh at least 4.5 pounds, making the minimum density 0.54 gram per milliliter. Better brands have higher densities—up to 0.9 grams per milliliter.
The two major components of this project will be the rock salt (NaCl) and Ice (H2O). When you add salt to water the salt dissolves into particles which are the ions of sodium chloride.The salt then lowers the freezing point of water preventing it from refreezing further.
- Large bag
- Small bag
- Ice
- Rock Salt
- Ingredients for Ice Cream
- Fill large bag with ice making sure not to fill all the way.
- Fill small bag with ingredients to make ice cream.
- Add rock salt to ice in large bag
- Insert tightly sealed small bag in to large bag and shake till crystallization.
With Ice Cream