What is the chemical formula for hydrated or slaked lime?

The chemical formula for hydrated or slaked lime is given by Ca(OH)₂. This compound is formed when calcium oxide (CaO), commonly known as quicklime, reacts with water. The process results in the hydration of the calcium oxide to create slaked lime, which consists of calcium ions and hydroxide ions.

Hydrated lime is important in various agricultural applications, particularly for soil amendment, as it can raise soil pH by neutralizing acidity. This enhances nutrient availability for crops and improves overall soil structure. Understanding the chemical composition of hydrated lime, as represented by Ca(OH)₂, is essential in effective nutrient management practices, especially for those dealing with soil health and fertility.

The other choices represent different compounds: calcium oxide is quicklime (not hydrated), calcium carbonate (CaCO₃) is commonly used in liming but is not slaked lime, and dolomitic lime (CaMg(CO₃)₂) contains magnesium as well and is another type of soil amendment but does not fit the description of hydrated lime.