which of the following is insoluble (1)calcium chloride (2)ammonium phosphate (3)barium sulfate (4)potassium chromate
Here is a simplified set of solubility rules. http://www.files.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html
To determine which of the following compounds is insoluble, we can refer to solubility rules. These rules provide guidelines on the solubility of various compounds.
1) Calcium chloride (CaCl2): According to the solubility rules, chloride salts are generally soluble, so calcium chloride is soluble in water.
2) Ammonium phosphate ((NH4)3PO4): Ammonium salts are generally soluble, and phosphate salts are also typically soluble except for those containing Group 1 cations (Li+, Na+, K+, etc.) or ammonium (NH4+). Since ammonium phosphate contains ammonium ions, it is soluble.
3) Barium sulfate (BaSO4): Sulfate salts are generally soluble, but barium sulfate is an exception. According to the solubility rules, barium sulfate is insoluble.
4) Potassium chromate (K2CrO4): Most chromate salts are soluble, including potassium chromate.
Therefore, the compound that is insoluble from the options given is barium sulfate (BaSO4).