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Key Differences Between Slaked Lime and Quicklime. Chemical Composition: Quicklime: Calcium oxide (CaO) Slaked Lime: Calcium hydroxide (Ca(OH)2) Reactivity: Quicklime is highly reactive and exothermic when it comes into contact with water. Slaked lime is less reactive and more stable, making it safer to handle and use.
Though hydrated lime and quicklime are both calcium compounds, they differ in many ways. The main differences between hydrated lime and quicklime are their reactivity & their chemical composition.
Quick lime is calcium oxide, $\ce{CaO}$, in the solid state. Slaked lime is calcium hydroxide, $\ce{Ca(OH)2}$, in the solid state. Lime water is a dilute solution of calcium hydroxide, $\ce{Ca(OH)2}$, in water.
The main differences between hydrated lime and quicklime are their reactivity & their chemical composition. Hydrated lime and quicklime are both calcium compounds. In its hydrated state, calcium is called calcium hydroxide, and in its pure state it is called calcium oxide, or quicklime.
Hydrated lime and quicklime are both forms of lime, but they differ in terms of their chemical composition and properties. Hydrated lime, also known as slaked lime, is produced by adding water to quicklime in a controlled process.
Calcium hydroxide (also called slaked lime) is an inorganic compound with the chemical formula Ca(OH) 2. It is a colorless crystal or white powder and is obtained when calcium oxide is mixed with water.
Moderately hydraulic lime contains 11-20% clay, slakes in one to two hours, and sets in approximately one week. It is used for better quality work and exterior walls in freezing climates. Eminently hydraulic lime contains 21-30% clay, slakes very slowly, and sets in approximately a day.
Hydrated lime, sometimes called slaked lime, is quicklime to which water has been added until all the oxides of calcium and magnesium have been converted to hydroxides. The water has slaked quicklime's thirst.
Since quicklime has high reactivity, it is important to slake it as it has the capacity to generate heat at a higher temperature when exposed to water. On the other hand, hydrated lime doesn’t require neutralization and is safe to mix with water.
While both are derived from limestone, they possess distinct attributes that make them suitable for different purposes. In this article, we will explore the characteristics, properties, and uses of lime water and slaked lime, shedding light on their similarities and differences.