Yes, niobium sulfate (Nb2(SO4)5) and barium nitrate (Ba(NO3)2) will react in an aqueous solution. This reaction will result in the formation of a precipitate, which is a solid that forms from a solution.

Here's why:

* Solubility Rules: Barium sulfate (BaSO4) is generally insoluble in water, while niobium nitrate (Nb(NO3)5) is soluble.

* Double Displacement Reaction: The reaction will proceed as a double displacement reaction, where the cations (positive ions) and anions (negative ions) swap partners.

The reaction equation:

Nb2(SO4)5 (aq) + 5Ba(NO3)2 (aq) → 5BaSO4 (s) + 2Nb(NO3)5 (aq)

Explanation:

* Reactants: Niobium sulfate (Nb2(SO4)5) and barium nitrate (Ba(NO3)2) are both soluble in water, forming ions.

* Products: Barium sulfate (BaSO4) is formed as a white precipitate due to its low solubility. Niobium nitrate (Nb(NO3)5) remains dissolved in the solution.

Observation:

The reaction will be evident by the formation of a white cloudy precipitate (BaSO4) in the solution.