What is K2HSO4? Important knowledge about K2HSO4.

Let’s explore the chemical compound K₂HSO₄ – a familiar substance in our everyday life.

1. What is K₂HSO₄?
   K₂HSO₄ is the chemical formula for Potassium hydrogen sulfate, also known as potassium bisulfate or acid potassium sulfate. In English, it is called “Potassium bisulfate” or “Potassium hydrogen sulfate.” The molar mass of K₂HSO₄ is 136.17 g/mol. The molecular structure of K₂HSO₄ consists of 2 potassium ions (K+), 1 hydrogen ion (H+), and 1 sulfate ion (SO₄₂-).

2. Properties of K₂HSO₄
   K₂HSO₄ is a solid, white, and odorless substance. The pH of K₂HSO₄ is very low (about 1), indicating that it has a strong acidity. K₂HSO₄ can react with metals and nonmetals to form new compounds.

3. Common chemical reactions of K₂HSO₄
   K₂HSO₄ often participates in reactions with metals, acids, nonmetals, and salts. Specifically, K₂HSO₄ can react with metals like Mg, Al to form MgSO₄, Al₂(SO₄)₃; with acids like HCl, H₂SO₄ to form KCl, H₂O, SO₂; with nonmetals like O₂, Cl₂ to form K₂SO₄, KCl; and with salts like NaCl, MgSO₄ to form KCl, K₂SO₄.

4. Preparation of K₂HSO₄
   In the lab, K₂HSO₄ can be prepared from K₂SO₄ and H₂SO₄ according to the reaction: K₂SO₄ + H₂SO₄ -> 2KHSO₄. Industrially, K₂HSO₄ is usually produced from the oxidation process of potassium sulfide (K₂S) with oxygen and sulfuric acid solution.