1. Calculate the pH of a solution that is 0.20M NH₃(aq) and 0.35 M NH₄Cl(aq). (Kb(NH₃) = 1.8 x 10-5)
2. For PbCl₂ (Ksp = 2.4 × 10–4), will a precipitate of PbCl₂ form when 0.10 L of 6.0 × 10–1 M Pb(NO₃)2 is added to 400 mL of 9.0 × 10–1 M NaCl?
A) Yes, because Q > Ksp. .
B) No, because Q < Ksp.
C) No, because Q = Ksp
D) Yes, because Q < Ksp