Barium sulfate, BaS

Ionic compounds which are only slightly soluble in water are said to be sparingly soluble. Examples include silver chloride (Ag", Cl ) and barium sulfate (Ba ", S04 ). Since such compounds are only slightly soluble, the volume of water used to dissolve a salt may be taken to be equal to the volume of the solution. (For example, if we dissolve 0.0010 g of silver chloride in 1000 cm of water, we may safely assume that the volume of the solution is also 1000 cm. ) This approximation does... 

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