VKC ScienceChemistry for written exams Telegram

UPSC Combined Geo-Scientist

Chemist

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

Mains Paper III covers analytical and organic chemistry.

UPSC Combined Geo-Scientist, Mains · 2020 · Mains Paper III

Q2(b). Extraction of metal chelates

Question

Derive the dependence of metal-chelate extraction on pH and extractant concentration.

Answer in brief

For an ideal neutral chelate, D≈ Kₑₓ[HR]_(org)ⁿ/[H⁺]ⁿ; raising pH generally promotes extraction.

Part of VKC Basic

Read the key points and the full model answer with VKC Basic

VKC Basic (₹999 for 6 months) opens every solved answer, the notes, the handbook and the daily answer archive. Every Mains test series includes it.

See what is included Already a member? Sign in

The full model answer

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.

The handwritten model answer pages open with the VKC plan.
Read the whole 2020 solution2020 question paper

CoversExtraction of metal chelatesSolvent extraction

All parts of Question 2