Question

part 4 of 4
ba(no₃)₂
○ soluble
○ insoluble

cu(oh)₂
○ soluble
○ insoluble

Explanation:

For $\boldsymbol{Cu(OH)_2}$:

Hydroxides of transition metals like copper are generally insoluble in water, following solubility rules.

Nitrates ($NO_3^-$) are almost always soluble, including barium nitrate, per solubility guidelines.

Answer:

insoluble

For $\boldsymbol{Ba(NO_3)_2}$: