The general definition of an acid is thus a compound releasing protons. However, all the acids don’t have the same strength or acidity. We can define two types of acids and bases: Strong acids and bases, and weak acids and bases. For more simplicity, we will focus on acids in this lesson but the principle is identical for […]

In this module we will review one of the main types of reaction of chemistry. Reactions can indeed be classified in 3 major categories: Acid-base reactions Redox (reduction and oxidation) reactions Solubility reactions (dissolution and precipitation) The two last reaction types are seen in other sections of our lessons. We will here focus on acid-base […]

It is often useful to take a look on the history of something to understand it. That is how we will begin our lessons about chemistry. As far as we can go, chemistry started with the discovery of fire, which is basically the combustion of a reactant to obtain heat from it. Later, different metals […]