Which salts are soluble in water?

Which salts are soluble in water?

• A. KNO3 and Na2CO3
• B. AgCl and BaSO4
• C. KNO3 and BaSO4
• D. AgCl and Na2CO3

Answer: (B)

Solubility of salts in water follows simple trends: many salts formed from alkali metals (like potassium and sodium) and common nitrates dissolve readily in water, while salts such as silver chloride and barium sulfate are classic insoluble (or only very sparingly soluble) in water. Potassium nitrate dissolves well in water, and sodium carbonate also dissolves readily. In contrast, silver chloride is only sparingly soluble, and barium sulfate is practically insoluble. Therefore, the pair that both dissolve in water is potassium nitrate and sodium carbonate, since each component is soluble on its own.

Solubility of salts in water follows simple trends: many salts formed from alkali metals (like potassium and sodium) and common nitrates dissolve readily in water, while salts such as silver chloride and barium sulfate are classic insoluble (or only very sparingly soluble) in water. Potassium nitrate dissolves well in water, and sodium carbonate also dissolves readily. In contrast, silver chloride is only sparingly soluble, and barium sulfate is practically insoluble. Therefore, the pair that both dissolve in water is potassium nitrate and sodium carbonate, since each component is soluble on its own.