Which pair of ions among the following can be | vedclass

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(A) The separation of lanthanoids is difficult due to their similar chemical properties. However, $Eu(II)$ shows similarity with alkaline earth metals

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$Eu(II)$ and $Dy(III)$

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(A) The separation of lanthanoids is difficult due to their similar chemical properties. However, $Eu(II)$ shows similarity with alkaline earth metals like $Sr(II)$.$Eu(II)$ can be precipitated as $EuSO_4$ in the presence of sulfate ions, similar to $SrSO_4$, while other trivalent lanthanoid ions like $Dy(III)$ or $Gd(III)$ remain in the solution.Therefore, the pair $Eu(II)$ and $Dy(III)$ (or any other trivalent lanthanoid) can be separated by the precipitation method.

Which pair of ions among the following can be separated by the precipitation method?

Similar Questions

Among $Ce(4f^{1} 5d^{1} 6s^{2})$,$Nd(4f^{3} 6s^{2})$,$Eu(4f^{7} 6s^{2})$ and $Dy(4f^{10} 6s^{2})$,the elements having highest and lowest $3^{rd}$ ionisation energies,respectively are

From the list given below,the number of lanthanides which exhibit $+4$ oxidation state in their oxides is: $Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy$

The correct order of ionic radii of $Ce$,$La$,$Pm$ and $Yb$ in $+3$ oxidation state is

What is the cause of lanthanoid contraction?

Which of the following elements have half-filled $f$-orbitals in their ground state?
(Given: atomic number $Sm = 62$; $Eu = 63$; $Tb = 65$; $Gd = 64$; $Pm = 61$)
$A.$ $Sm$ $B.$ $Eu$ $C.$ $Tb$ $D.$ $Gd$ $E.$ $Pm$
Choose the correct answer from the options given below:

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