Answer
See answer below.
Work Step by Step
a) $NaBr$
Any cation with the exception of $Ag^+, Hg^{2+}, Pb^{2+}$ would fit the criteria.
b) $AgOH$
Any cation with the exception of alkali metals, $Ba^{2+}, Sr^{2+}$ would fit the criteria.
c)$PbCO_3$
Any cation with the exception of alkali metals, and ammonium would fit the criteria.
d) $NaNO_3$
Any cation would fit the criteria.
e) $CH_3CO_2H$
Any weak acid and the conjugates of strong Brønsted bases fit the criteria.
