Most Of The The Students Are Confused Confused In The

Most of the the students are confused confused in the above mentioned questions. They always thought that weak acids must not be corrosive. This is a wrong concept. Let us revise again the topics of Acids and Bases.

Strong Acids Strong acids completely dissociate in water, forming H+ and an anion. There are six strong acids:

1. HCl - hydrochloric acid 2. HNO3 - nitric acid 3. H2SO4 - sulfuric acid 4. HBr - hydrobromic acid 5. HI - hydroiodic acid 6. HClO4 - perchloric acid

Weak Acids A weak acid only partially dissociates in water to give H+ and the anion. Examples of weak acids include hydrofluoric acid, HF, and acetic acid, CH3COOH.

Strong is Different from Corrosive

Corrosiveness is related to the negatively-charged part of the acid. Hydrofluoric acid (HF), for example, is so corrosve it dissolves glass. The fluoride ion attacks the silicon atom in silica glass while the proton is interacting with oxygen. Even though it is highly corrosive, hydrofluoric acid is not considered to be a strong acid because it does not completely dissociate in water.