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The lanthanide(III) ion having the highest partition coefficient between tri-n-but ylphosphate and conc. HNO3 is:
  • a)
    La(III)
  • b)
    Eu(III)
  • c)
    Nd(III)
  • d)
    Lu(III)
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
The lanthanide(III) ion having the highest partition coefficient betwe...
Explanation:
Partition coefficient is a measure of how a solute distributes itself between two immiscible phases. In this case, the two immiscible phases are tri-n-butylphosphate and concentrated nitric acid.

The lanthanide(III) ion having the highest partition coefficient between tri-n-butylphosphate and conc. HNO3 will be the one that is most soluble in tri-n-butylphosphate.

The solubility of lanthanide(III) ions in tri-n-butylphosphate decreases with increasing atomic number. Therefore, the lanthanide(III) ion with the highest partition coefficient will be the one with the lowest atomic number.

The correct answer is option D, Lu(III), which has the lowest atomic number among the options given.

Therefore, the lanthanide(III) ion having the highest partition coefficient between tri-n-butylphosphate and conc. HNO3 is Lu(III).
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The lanthanide(III) ion having the highest partition coefficient between tri-n-but ylphosphate and conc. HNO3 is:a)La(III)b)Eu(III)c)Nd(III)d)Lu(III)Correct answer is option 'D'. Can you explain this answer?
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