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Question

How strong is the strongest acid?


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Solution

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 (HSbF6) is the strongest acid.
  • pH of fluoroantimonic acid is -31.3.
  • It is a super acid mixture of antimony pentafluoride (SbF5) and hydrogen fluoride ( HF).
  • It is 20 quintillion times stronger than 100% sulfuric acid.
  • So lesser the pH stronger the acid.

As per the question fluoroantimonic acid (HSbF6) is the strongest acid with a pH value of -31.3.


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