A solution containing sodium fluoride is mixed with a solution containing lead nitrate to form a solution that is O.00720 M in NaF and 0.000640 M in Pb(NO3)2. If the Kgp for PBF2 is 3.3x10-8, then O Q > K and a precipitate of PbF2 will form. OQ < K and more PbF2 will precipitate since the solution is not supersaturated. OQ < K and PbF2 does not precipitate. O Q = K and the system is at equilibrium.

When 15.0 mL of a 7.21×104 M copper(II) chloride solution is combined with 12.0 mL of a 3.67×104 M ammonium carbonate solution does a precipitate form? (yes or no) For these conditions the Reaction Quotient, Q, is equal to

Can you answer it in the format it’s asking for, with the Mol BaCl2 or whatever it ends up being

Use the reaction quotient to predict whether a precipitate will form. If 15.0 mL of 9.93×104 M Pb(NO3)2 are added to 22.0 mL of 2.60×105 M (NH4)2SO4 will solid PbS04 (Ksp = 1.8×10) precipitate? If a precipitate will not form, what sulfate ion concentration will cause a precipitate of lead sulfate to form? If a precipitate will form, what is the minimum [SO42] that could have been present without initiating precipitation? Assume the total volume used in the above example. M