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Q: Perchloric acid is standardized using _____.
  • A. Sodium carbonate
  • B. Potassium permanganate
  • C. Oxalic acid
  • D. Potassium hydrogen phthalate
Correct Answer: Option D - Potassium hydrogen phthalate which can be used to standardize perchloric acid and an aqueous base in an acetic acid solution.
D. Potassium hydrogen phthalate which can be used to standardize perchloric acid and an aqueous base in an acetic acid solution.

Explanations:

Potassium hydrogen phthalate which can be used to standardize perchloric acid and an aqueous base in an acetic acid solution.