その理由は次のとおりです。
* 溶解度ルール： 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.
反応方程式：
Nb2(SO4)5 (aq) + 5Ba(NO3)2 (aq) → 5BaSO4 (s) + 2Nb(NO3)5 (aq)
説明：
* 反応物： Niobium sulfate (Nb2(SO4)5) and barium nitrate (Ba(NO3)2) are both soluble in water, forming ions.
* 製品： Barium sulfate (BaSO4) is formed as a white precipitate due to its low solubility. Niobium nitrate (Nb(NO3)5) remains dissolved in the solution.
観察：
The reaction will be evident by the formation of a white cloudy precipitate (BaSO4) in the solution.
