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  • An alkaline mixture of  and <img alt="\mathrm{Sm}^{3+}" src="/latex-image/?%5Cmathrm%7BSm%7D%5E%7B3&amp

An alkaline mixture of  \mathrm{Ce}^{3+} and \mathrm{Sm}^{3+} is found in an old bottle. How to separate \mathrm{Ce}^{3+}  ?

Option: 1

\text { Adding } \mathrm{NH}_4 \mathrm{OH}


Option: 2

\text { Adding } \mathrm{HCl}


Option: 3

\text { Adding } \mathrm{NaOCl}


Option: 4

\text { Adding } \mathrm{CH}_3 \mathrm{COOH}


Answers (1)

best_answer

\mathrm{Ce}^{3+} oxidises to \mathrm{Ce}^{4+} on adding \mathrm{NaOCl} under alkaline conditions which makes \mathrm{Ce}^{4+} soluble which can be further precipitated to \mathrm{CeO}_2 and removed.

Posted by

shivangi.bhatnagar

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