which of the following is insoluble ?
(1)calcium chloride
(2)ammonium phosphate
(3)barium sulfate
(4)potassium chromate
so its 3 ?
yes. Did you look at the solubility rules.
Yes, you are correct. Barium sulfate (BaSO4) is insoluble.
To determine which of the following compounds is insoluble, we need to refer to a solubility table or solubility rules. In this case, we can use general solubility rules to make predictions about the solubility of the compounds.
(1) Calcium chloride (CaCl2): Calcium chloride is soluble in water and forms a colorless solution. It is not insoluble.
(2) Ammonium phosphate ((NH4)3PO4): Ammonium phosphate is soluble in water and forms a colorless solution. It is not insoluble.
(3) Barium sulfate (BaSO4): Barium sulfate is typically considered insoluble in water. It forms a white precipitate when combined with sulfate ions. Therefore, barium sulfate is insoluble.
(4) Potassium chromate (K2CrO4): Potassium chromate is soluble in water and forms a yellow solution. It is not insoluble.
Based on the solubility rules and the provided compounds, only barium sulfate (BaSO4) is insoluble. So, your answer is correct.