Role details

Solvents are used to keep solid ingredients dissolved so they can mix with other ingredients.

There are 2 main types of solvents: 

1. Polar (e.g water)

2. Non-polar (e.g chloroform). 

Polarity is a chemical property that refers to the arrangement of charge around a molecule. Some molecules have charges distributed evenly around the molecule. These molecules are non-polar. Other molecules have charges distributed unevenly, e.g positive charges at one end and negative charges at the other, like a magnet. These molecules are polar. 

Only polar solvents can dissolve polar substances, and vice versa for non-polar solvents. This is due to the different interactions between polar and non-polar molecules.

Role Ingredients