is coco3 soluble
+ CoCO3 is insoluble because all carbonates, sulfites and phosphates are insoluble EXCEPT those of ammonium and Alkali metal (Group IA) cations. + PbCl2 is insoluble because all chlorides, bromides and iodides are soluble EXCEPT those of silver, lead and mercury(I).Source(s):E: Compounds soluble in water? Which of the following compounds is soluble in water? -Ni(OH)2 -K3PO4 -BaSO4 -CoCO3 -PbCl2 And could you explain how to tell.