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AIIMS2003ChemistryGeneral Principles and Processes of Isolation of Metals

The compound used for gravimetric estimation of copper(II) is

Options

  1. ACu ₂( SCN )₂
  2. BCu ₂ O
  3. CCu ₂ I ₂
  4. DCu ₂ CO ₃ .

Correct answer

A. Cu ₂( SCN )₂

Step-by-step solution

Copper thiocyanate Cu ₂( SCN )₂ is used to estimate copper gravimetrically. 2 Cu ²⁺+ SO ₄ ²⁻+2 SCN ⁻+ H ₂ O 2 CuSCN + H ₂ SO ₄

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