The chemical formula of sodium sulfate is Na2SO4, and the chemical formula of hydrochloric acid is HCl. The principle of the reaction between sodium sulfate and hydrochloric acid is that HSO4- can not be completely ionized in water, but is partially ionized and generates SO42- and H+.

after adding strong acid such as hydrochloric acid, HSO4- ions with weak acidity will be generated.

sodium sulfate is a salt formed by the combination of sulfate radical and sodium ion, and its chemical formula is Na2SO4. Sodium sulfate is soluble in water, and its solution is mostly neutral, soluble in glycerol but insoluble in ethanol. Inorganic compounds, anhydrous substances with high purity and fine particles are called anhydrous sodium sulfate.