Differentiate between a strong acid and a weak acid, giving one example of each

A strong acid and a weak acid differ primarily in their ability to ionize, or break apart into ions, in a solution.

1. Strong Acid: A strong acid is one that completely ionizes in a solution. This means that it breaks apart into its ions completely when dissolved in water. Because of this, strong acids are good proton donors. An example of a strong acid is hydrochloric acid (HCl). When HCl is added to water, it ionizes completely to form H+ (proton) and Cl- ions.

2. Weak Acid: A weak acid, on the other hand, does not completely ionize in a solution. This means that only a small fraction of the acid will break apart into its ions when dissolved in water. Therefore, weak acids are not as good at donating protons as strong acids. An example of a weak acid is acetic acid (CH3COOH), which is the main component of vinegar. When acetic acid is added to water, only a small fraction of it ionizes to form H+ and CH3COO- ions.

In summary, the main difference between a strong acid and a weak acid is the degree to which they ionize in a solution, with strong acids ionizing completely and weak acids only partially.