Question

question 45 (1 point)
listen
which of the following ions would create an insoluble compound with ba²+ in water?
br-
no3-
cl-
co3²-
ch3coo-

Explanation:

According to solubility rules:

• Bromides (\(Br^-\)), chlorides (\(Cl^-\)): Most bromides and chlorides are soluble. Exceptions are for \(Ag^+\), \(Pb^{2 +}\), \(Hg_2^{2+}\). Barium bromide (\(BaBr_2\)) and barium chloride (\(BaCl_2\)) are soluble.
• Nitrates (\(NO_3^-\)): All nitrates are soluble. So \(Ba(NO_3)_2\) is soluble.
• Acetates (\(CH_3COO^-\)): Most acetates are soluble. \(Ba(CH_3COO)_2\) is soluble.
• Carbonates (\(CO_3^{2 -}\)): Most carbonates are insoluble (except for those of Group - 1 metals and \(NH_4^+\)). Barium carbonate (\(BaCO_3\)) is insoluble.

Answer:

\(CO_3^{2-}\)