Question

Which substance is most soluble in water? 1) (NH4)3PO4 2)Cu(OH)2 3) AG2SO4 4) CACO3

Answer 1

The most soluble of the compounds given above is [NH4]3PO4. [NH4]3PO4 is a salt of ammonium and phosphate; it is a white crystal at room temprature. It is an highly unstable compound and thus easily decompose when mixed with water.