Fractional precipitation POGIL activities focus on separating ions in solution by comparing solubility product constants ( cap K sub s p end-sub ) and reaction quotients (
) is slowly added. Your task is to determine which ion precipitates first and calculate the concentrations remaining at specific equilibrium points. 1. Predicting Which Ion Precipitates First fractional precipitation pogil answer key
expression of the first compound to find the maximum remaining concentration of the first ion. Q4: Separation Efficiency Predicting Which Ion Precipitates First expression of the
is a laboratory technique used to separate two or more ions in a single solution by adding a reagent that forms a solid precipitate with each ion at different stages. Core Principles The process relies on the solubility product constant ( Kspcap K sub s p end-sub ) of the compounds formed. When a solution contains multiple dissolved ions, adding
When a solution contains multiple dissolved ions, adding a specific counter-ion can cause them to drop out of the solution as solids (precipitates). However, because different compounds have different solubilities, they do not all precipitate at the same time.
) to selectively remove one cation from a mixture. Below is a guide to the standard models and key answers found in this activity. Model 1: A Precipitation Experiment