What Are The Physical Properties Of Aluminium Sulfate?

Aluminium sulfate (Al2(SO4)3) is a white crystalline solid that is commonly used in water treatment and as a mordant in dyeing fabrics. Some of its physical properties are:

1. Appearance: Aluminium sulfate appears as a white crystalline powder or as colorless to light yellowish crystals.

2. Density: The density of aluminium sulfate varies depending on the form and purity, but is typically between 2.67 and 2.71 g/cm³.

3. Melting point: The melting point of aluminium sulfate ranges from 770 to 775 °C.

4. Solubility: Aluminium sulfate is highly soluble in water and forms an acidic solution. It is also soluble in ethanol and glycerol.

5. Hygroscopicity: Aluminium sulfate is hygroscopic, meaning it can absorb moisture from the air and become damp.

6. pH: Aluminium sulfate solutions are acidic with a pH of around 3.

7. Odor: Aluminium sulfate has no distinct odor.

8. Reactivity: Aluminium sulfate is a strong oxidizing agent and can react violently with reducing agents. It is also corrosive to metals and can cause skin irritation and eye damage.

Overall, aluminium sulfate is a highly soluble, acidic, and hygroscopic compound with a high melting point and no distinct odor. Its reactivity and potential hazards should be taken into account when handling this substance.