Structure of aluminum potassium sulfate

Introduction: aluminum potassium sulfate, colorless crystal or powder No smell, slightly sweet and astringent, astringent In the dry air weathering lost crystal water, dissolved in the humid air flowing water It is soluble in glycerin and water, and the aqueous solution shows acid reaction After hydrolysis, aluminum hydroxide colloid precipitates So what's the structure of aluminum potassium sulfate? Let's take a look with the small safety net of Baibai Aluminum potassium sulfate, colorless crystal or powder No smell, slightly sweet and astringent, astringent In the dry air weathering lost crystal water, dissolved in the humid air flowing water It is soluble in glycerin and water, and the aqueous solution shows acid reaction After hydrolysis, aluminum hydroxide colloid precipitates So what's the structure of aluminum potassium sulfate? Let's take a look at it with the small safety net of Baibai Aluminum potassium sulfate structure aluminum potassium sulfate is the double salt of potassium sulfate and aluminum sulfate containing crystal water Chemical formula Kai (SO4) 2.12h2o, colorless cubic, monoclinic or hexagonal crystal, with glass luster, density of 1.757g/cm3, melting point of 92.5 ℃ At 64.5 ℃, 9 molecules of crystal water are lost, and at 200 ℃, 12 molecules of crystal water are lost They are soluble in water and insoluble in ethanol Alum is sour, cold and poisonous Therefore, it has antibacterial and astringent effects and can be used as traditional Chinese medicine Alum can also be used to prepare aluminum salt, fermentation powder, paint, tanning material, clarifier, mordant, papermaking, waterproof agent, etc Water purification is a method often used by the people in the past Its principle is that alum can ionize two kinds of metal ions in the water: Kal (SO4) 2 = K + + Al3 + + 2so42 - and Al3 + is easily hydrolyzed to form colloidal aluminum hydroxide [al (OH) 3]: Al3 + + 3H2O = Al (OH) 3 (colloid) + 3H + 2kal (SO4) 2 + 6H2O = (reversible) = K2SO4 + 2Al (OH) 3 (without precipitation sign) + 3h2so4 Aluminum hydroxide colloid has a strong adsorption capacity, which can adsorb suspended impurities in water, and form precipitation to make water clear Therefore, alum is a better water purification agent Alum can be obtained by calcining, extracting and crystallizing alum stone The above is the introduction about the structure of aluminum potassium sulfate provided by the small edition of Baibai safety net I sincerely hope it can help you! If you want to know more about food safety, please pay more attention to Baibai safety net bar! Editor in charge: Wu Mengli