Fractional Precipitation Pogil Answer Key Fix 99%

occurs when two soluble salts react to form an insoluble solid (the precipitate). For example, mixing silver nitrate (AgNO₃) and sodium chloride (NaCl) forms solid AgCl.

The [Cl⁻] added is roughly (10 mL × 0.1 M) / 110 mL total ≈ 0.009 M. This exceeds the threshold for Hg₂²⁺ and Ag⁺ but is much lower than the 0.0412 M needed for Pb²⁺. Question 4: Why can’t we completely separate AgCl from Hg₂Cl₂ by simple fractional precipitation? Answer: 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. fractional precipitation pogil answer key

is a technique used to separate a mixture of metal ions from a solution. It relies on a key principle: Different ions have different solubilities (Ksp values). By carefully adding a precipitation agent (like chloride, sulfide, or hydroxide ions), you can cause the least soluble compound to precipitate first , leaving the more soluble ions in solution. occurs when two soluble salts react to form