which of the following is insoluble ?
(1)calcium chloride
(2)ammonium phosphate
(3)barium sulfate
(4)potassium chromate
its 2, right ?
all ammonium compounds are soluble, as all potassium. What about barium compounds.
To determine which of the given compounds is insoluble, we need to consult a solubility table or reference source. Solubility refers to the ability of a substance to dissolve in a particular solvent. In this case, we are interested in the solubility of the compounds in water.
By referencing a solubility table, we can find the solubility of each compound:
(1) Calcium chloride (CaCl2): Calcium chloride is soluble in water. It dissociates into calcium ions (Ca2+) and chloride ions (Cl-) when dissolved in water.
(2) Ammonium phosphate ((NH4)3PO4): Ammonium phosphate is actually soluble in water. It dissociates into ammonium ions (NH4+) and phosphate ions (PO43-) when dissolved in water.
(3) Barium sulfate (BaSO4): Barium sulfate is insoluble in water. It is highly insoluble and does not dissolve appreciably in water. Therefore, it remains as solid particles in the water.
(4) Potassium chromate (K2CrO4): Potassium chromate is soluble in water. It dissociates into potassium ions (K+) and chromate ions (CrO42-) when dissolved in water.
Based on this information, the correct answer is option (3) - barium sulfate (BaSO4) is insoluble in water.