: The solution is at equilibrium (saturated); precipitation is just about to begin. If
Remember that if the ions you are separating aren't starting at the same concentration, the salt with the smaller Kspcap K sub s p end-sub fractional precipitation pogil answer key best
3. Step-by-Step Calculation Example Imagine a solution with Cl−cap C l raised to the negative power Br−cap B r raised to the negative power AgNO3cap A g cap N cap O sub 3 Kspcap K sub s p end-sub AgClcap A g cap C l = Kspcap K sub s p end-sub AgBrcap A g cap B r = Step A: Calculate needed for AgBrcap A g cap B r : The solution is at equilibrium (saturated); precipitation
. Forgetting the exponent is the most common reason for getting POGIL answers wrong. Forgetting the exponent is the most common reason
[Ag+]=1.8×10-9Mopen bracket cap A g raised to the positive power close bracket equals 1.8 cross 10 to the negative 9 power space cap M Since is smaller than , the AgBrcap A g cap B r will precipitate first. 4. How "Complete" is the Separation?