Since AgI is far less soluble, it will precipitate first until the iodide concentration drops extremely low, at which point AgCl begins to precipitate. This stepwise separation is fractional precipitation.
To ensure you truly learn fractional precipitation, follow this protocol: fractional precipitation pogil answer key best
. It starts to form a precipitate when the reaction quotient exceeds this value (e.g., at Since AgI is far less soluble, it will
To help you check your calculations on a specific problem, let me know: It starts to form a precipitate when the
Solve for the concentration of the first ion. This tells you how "complete" the separation was. 4. Key Pitfalls to Avoid Stoichiometry Matters: Don't forget exponents! If you have cap P b cap C l sub 2 cap K sub s p end-sub cap K sub s p end-sub You can only compare cap K sub s p end-sub
) is left in the solution at this precise moment, plug this shared Ag+Ag raised to the positive power concentration back into the equilibrium expression: