Question

How strong is the strongest acid?

Answer 1

The pH is a quantitative measure of the acidity or basicity of aqueous or other liquid solutions.

• The acidity or basicity of a solution depends upon its pH value.
• The term “strong” and “weak” give an indication of the strength of an acid and base.
• The basic solution has a high pH value and the acidic solution have a low pH value.
• The solution is considered neutral if the pH value is 7.
• 

Strong acid: Strong acids are those acids that dissociate or break down completely in their ions.

• Fluoroantimonic acid (${\mathrm{HSbF}}_6$) is the strongest acid.
• $\mathrm{pH}$ of fluoroantimonic acid is -31.3.
• It is a super acid mixture of antimony pentafluoride (${\mathrm{SbF}}_5$) and hydrogen fluoride ( $\mathrm{HF}$).
• It is 20 quintillion times stronger than 100% sulfuric acid.
• So lesser the pH stronger the acid.

As per the question fluoroantimonic acid (${\mathrm{HSbF}}_6$) is the strongest acid with a pH value of -31.3.