Calcium Hydroxide

Calcium hydroxide, also known as slaked lime, is a chemical compound with the chemical formula Ca(OH)₂. It is a white, powdery substance that is produced by mixing calcium oxide (lime) with water. This process is known as slaking, which results in the formation of calcium hydroxide.

Properties of Calcium Hydroxide:

• Appearance: White powder
• Solubility: Slightly soluble in water
• pH: Alkaline (pH > 7)
• Odor: Odorless
• Use: Widely used in various applications including in the production of cement, as a flocculant in water and sewage treatment, in the food industry, and in agriculture.

Chemical Reactions:

Calcium hydroxide undergoes various chemical reactions:

1. When mixed with water, it forms a saturated solution known as lime water, which is used as a test for carbon dioxide.
2. It reacts with acids to form calcium salts.
3. When heated, it undergoes thermal decomposition to produce calcium oxide and water.

Study Guide:

To better understand calcium hydroxide, it is important to study the following aspects:

1. Chemical structure and formula of calcium hydroxide.
2. Preparation methods of calcium hydroxide.
3. Physical and chemical properties of calcium hydroxide.
4. Reactions involving calcium hydroxide.
5. Applications of calcium hydroxide in various industries.

Understanding these aspects will provide a comprehensive knowledge of calcium hydroxide and its significance in the fields of chemistry, industry, and environmental science.