The lanthanides have very similar chemical properties. Their hydroxides and oxalates have slightly different (K_{sp}) values. By carefully controlling pH and precipitant concentration, industries separate neodymium from praseodymium for magnets and batteries.
Using H₂S as the precipitating agent (where [S²⁻] is controlled by pH), which metal sulfide precipitates first? Fractional Precipitation Pogil Answer Key
[ [Ag^+] {remaining} = \frac{K {sp}(AgCl)}{[Cl^-]} = \frac{1.8 \times 10^{-10}}{0.041} \approx 4.4 \times 10^{-9} M ] The lanthanides have very similar chemical properties
What are the steps involved in the process of fractional precipitation? Using H₂S as the precipitating agent (where [S²⁻]
Use the (K_{sp}) of AgCl and the [Cl⁻] at which Pb²⁺ starts to precipitate (0.041 M).
Chemistry instructors often look for precise sig figs in POGIL responses, especially when dealing with very small Kspcap K sub s p end-sub
expression of the first compound. This tells you how much of the first ion is left. Usually, it is a very small amount, proving that the separation was successful. Tips for Success In Kspcap K sub s p end-sub