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UPSC Combined Geo-Scientist

Chemist

  • 3 descriptive papers
  • 200 marks each
  • 3 h per paper

Mains Paper I covers inorganic chemistry.

UPSC Combined Geo-Scientist, Mains · 2016 · Mains Paper I

Q6(c). Acid strength and pH

Question

What is pKₐ value of a weak acid? How is it related to its pH? Explain.

Answer in brief

pKₐ=-log₁₀ Kₐ describes acid strength; pH also depends on concentration and composition.

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As written for the answer booklet: the diagram carries the working, the lines stay short. Read here only; it is not offered as a download.

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Read the whole 2016 solution2016 question paper

CoversAcid strengthAcid equilibria

All parts of Question 6