2008 USNCO Local #2: Yellow Precipitate
Source:
December 3, 2012
Problem Statement
Which pair of aqueous solutions produce a yellow precipitate upon mixing? (A) \hspace{.05in} \ce{AlCl3} \text{ and } \ce{KOH} \qquad (B)\hspace{.05in}\ce{Ba(NO3)2} \text{ and }\ce{ Na2SO4} \qquad (C)\hspace{.05in}\ce{Cu(NO3)2} \text{ and } \ce{NaClO4} \qquad (D)\hspace{.05in}\ce{Pb(C2H3O2)2} \text{ and } \ce{KI} \qquad