Tungstic acid solubleness according to different solvents and forms of tungstic acid will show in states of insoluble, slightly soluble, easily soluble and easily soluble, like the following table:
Solubleness also solubility, is the property of a solid, liquid, or gaseous chemical substance called solute to dissolve in a solid, liquid, or gaseous solvent. The dissolved substances called solute, and the dissolve content liquid (commonly too much) is called solvent, while the generated mixture is called solution. Under the steady pressure and temperature, the dissolving quality of solid solute in saturated state in 100g of solvent is called solubility. While the solubility of a gas is the volume of a specific gas which dissolved in 1 volume of solvent at the conditions of 101 Kpa, a certain temperature and reaches to a saturated state.
If a solute dissolved well in a solvent, we will say this substance is soluble; and say it’s slightly soluble if the solubility is not high; If it is difficult to dissolve, we say this material is insoluble or a refractory.