Wednesday, June 1, 2022

Why are strong acids generally used as standard solutions in acid-base titrations?

An acid-base titration is a quantitative analysis for estimating the concentration of an acid/base that has been suitably neutralized with a standard solution of a known concentration of acid or base. The endpoint and progress of the acid-base reaction are monitored using a pH indicator. Titration can be done with practically any chemical reaction that has a known balanced chemical equation.

Why are strong acids generally used as standard solutions in acid base titration?

  1. The salts of strong acids do not hydrolyse
  2. The pH at the equivalence point will always be 7
  3. They can be used to titrate both strong and weak bases
  4. Strong acids form more stable solutions than weak acids

The correct option is 3: They can be used to titrate both strong and weak bases

Explanation:

Strong acids are generally used as standard solutions in acid-base titrations since strong acids can react with both strong and weak bases, they are commonly employed as standard solutions in acid-base titrations.

The following are some examples of strong acids used in the acid-base titration.
  • Hydrochloric acid (HCl)
  • Sulfuric acid (H2SO4)
  • Nitric acid (HNO3)
  • Perchloric acid (HClO4)
  • Hydrobromic acid (HBr)
  • Hydroiodic acid (HI)
  • Chloric acid (HClO3)

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