Fractional precipitation occurs when a reagent is added slowly to a solution containing multiple ions. As the concentration of the precipitating reagent increases, the compound with the lower solubility product constant ( Kspcap K sub s p end-sub
Ksp=[Ag+][I−]cap K sub s p end-sub equals open bracket cap A g raised to the positive power close bracket open bracket cap I raised to the negative power close bracket fractional precipitation pogil answer key
The POGIL activity requires you to calculate the concentration of the precipitating agent (e.g., Cl−Cl raised to the negative power ) needed to start precipitation for each salt. For Compound 2 ( ): Fractional precipitation occurs when a reagent is added
Their precipitation [Cl⁻] values are very close (1.14×10⁻⁸ M vs. 1.8×10⁻⁸ M). There is significant overlap; some AgCl will begin to precipitate before all Hg₂²⁺ is removed. Justify your answer using the Kₛₚ values
POGIL activities usually start with "Model 1," showing a visual diagram of beakers or a data table of Kspcap K sub s p end-sub
If Ag⁺ ions are added slowly to a solution containing both Cl⁻ and I⁻ ions, which precipitate will form first? Justify your answer using the Kₛₚ values.