Fractional Precipitation Pogil Answer Key _top_ -

The goal of fractional precipitation is to remove one type of ion from a mixture of several. This relies on the fact that different compounds have different .

): A measure of the relative amounts of products and reactants present in a reaction at a given moment.

[Precipitating Ion]=Ksp[Target Ion][Precipitating Ion] equals the fraction with numerator cap K sub s p end-sub and denominator [Target Ion] end-fraction Model 3: Determining Separation Efficiency fractional precipitation pogil answer key

The common ion effect decreases the solubility of AgCl. In pure water, the molar solubility of AgCl is √Kₛₚ = √(1.8 × 10⁻¹⁰) ≈ 1.34 × 10⁻⁵ M. In a 1.0 M Cl⁻ solution:

At the moment AgCl just begins to precipitate, what is the concentration of I⁻ remaining in the solution? What fraction of the original I⁻ remains? The goal of fractional precipitation is to remove

The final section challenges students to calculate how much of the first ion remains in the solution right at the exact moment the second ion begins to precipitate. This determines whether a clean analytical separation is achievable. Step-by-Step Breakdown of the POGIL Answer Key Problems

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. What fraction of the original I⁻ remains

) at the lowest concentration of the added reagent precipitates first.

A solution contains ( \textBa^2+ ) and ( \textSr^2+ ), each at 0.10 M. You add ( \textNa_2\textSO 4 ) dropwise. (K sp(\textBaSO 4) = 1.1 \times 10^-10) (K sp(\textSrSO_4) = 3.2 \times 10^-7)

Step 4 — When precipitation begins:

If you are working through a POGIL and find yourself stuck, keep these tips in mind: Always write out the balanced dissolution equation first.