Always calculate the required precipitant concentration . For (Ag_2S) (very small (K_sp)) vs. (CuS), the sulfide ion needed might be different due to stoichiometry.
By working through these guided steps, you build a foundation in chemical equilibrium that is essential for more advanced topics like qualitative analysis and complex ion formation. fractional precipitation pogil answer key
Cu(NO3)2(aq)+Na2CO3(aq)→CuCO3(s)+2NaNO3(aq)cap C u open paren cap N cap O sub 3 close paren sub 2 open paren a q close paren plus cap N a sub 2 cap C cap O sub 3 open paren a q close paren right arrow cap C u cap C cap O sub 3 open paren s close paren plus 2 cap N a cap N cap O sub 3 open paren a q close paren 3. Predicting the Order of Precipitation The compound with the will precipitate first because its ion product ( Qspcap Q sub s p end-sub ) will exceed the Kspcap K sub s p end-sub at a lower concentration of the common ion. What is fractional precipitation? #bepharmawise Always calculate the required precipitant concentration