Home
Class 12
CHEMISTRY
Why Sm^(2+) , Eu^(2+) and Yb^(2+) ions a...

Why `Sm^(2+) , Eu^(2+) and Yb^(2+)` ions are good reducing agents , but and aqueous solution of `Ce^(4+)` is good oxidsing (Z=64) and Lutetium (Z= 7) are especially, stable . Why ?

Text Solution

Verified by Experts

The most stable oxidation state of lanthanides is `+3`. Hence, ions in `+2` state tend to change to `+3` state by loss of electron and those in `+4` state tend to change to `+3` state by gain of electron.
Promotional Banner

Topper's Solved these Questions

  • APPENDIX INORGANIC VOLUME 2

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercises|137 Videos

  • ALIPHATIC AND AROMATIC ALDEHYDES AND KETONES

    CENGAGE CHEMISTRY ENGLISH|Exercise Archives Subjective|26 Videos

  • AROMATIC COMPOUNDS AND ALKYL AND ARYL HALIDES

    CENGAGE CHEMISTRY ENGLISH|Exercise Archives Subjective Type|4 Videos

Similar Questions

Explore conceptually related problems

Why Eu^(2+) and Yb^(2+) ions in solutions are good reducing agents but an aqueous solution of Ce^(4+) is a good oxidising agent?

Why Ce^(4+) is a good oxidising agent

(a). Of the lanthanides, cerium (Z=58) forms a tetrapositive ion, Ce^(4+) in aqueous solution. Why? (b), The +3 oxidation states of lanthanum (Z=57) , gadolinium (Z=64) and lutetium (Z=71) are especially stable. Why?

Cu^(2+) ions will be reduced to Cu^(+) ions by the addition of an aqueous solution of:

A: Ce^(+4) is a good oxidizing agent. R: Sm^(2+) is a good reducing agent

Why does H_(2)O_(2) act both as an oxidising and a reducing agent?

Why is H_(2)S a better reducing agent than H_(2)O ?

Which is a stronger reducing agent Cr^(2+) or Fe^(2+) and why?

Which is a stronger reducing agent Cr^(2+) or Fe^(2+) and why?

Addition of Hgl_(2) to the aqueous solution of Kl shows an icrease in the osmotic pressure, why?

CENGAGE CHEMISTRY ENGLISH-APPENDIX INORGANIC VOLUME 2-Short Answer Type
  1. Scandium forms no coloured ions, yet it is regarded as a transition el...

    Text Solution

    |

  2. Assertion : Hydrochloric acid is not used to acidify a KMnO(4) solutio...

    Text Solution

    |

  3. Why Sm^(2+) , Eu^(2+) and Yb^(2+) ions are good reducing agents , but ...

    Text Solution

    |

  4. Why is the separation of lanthanide elements difficult?

    Text Solution

    |

  5. Account for the fact that second ionization energies of both Cr and Cu...

    Text Solution

    |

  6. Name the compound used for measuring the hardness of water, i.e., for ...

    Text Solution

    |

  7. How will you distinguish between the following isomer pairs? (i). [...

    Text Solution

    |

  8. The magnitude of stability constant gives an indication of the stabili...

    Text Solution

    |

  9. What are the most important coordination numbers encountered in coordi...

    Text Solution

    |

  10. Name the central atom present in haemoglobin and chlorophyll.

    Text Solution

    |

  11. the red coloured Wilkinson's catalyst, [RhCl(PPh(3))(3)] is a homogeno...

    Text Solution

    |

  12. What is spectrochemical series? Explain the difference between a weak ...

    Text Solution

    |

  13. The magnitude of CFSE (Crystal Field Splitting Energy , Delta(0)) can ...

    Text Solution

    |

  14. What are t(2g) and e(g) orbitals?

    Text Solution

    |

  15. Give the geometry and magnetic character of [NiBr4]^(2-)

    Text Solution

    |

  16. How is tetrabutyl tim prepared?

    Text Solution

    |

  17. What is the coordination number of Fe in [Fe("edta")]^(-) ?

    Text Solution

    |

  18. Name the two broad categories of organometallic compounds.

    Text Solution

    |

  19. In the formula Fe(eta^(5)-C5H5), what does the prefix eta^(5) denote?

    Text Solution

    |

  20. Name two complexes which are used in medicines.

    Text Solution

    |