What is the reaction of adding water to quicklime?

React with water

Variable calcium hydroxide

1. quicklime+water (which will produce exothermic reaction) becomes hydrated lime.

2. slaked lime absorbs carbon dioxide (CO2) and then becomes limestone.

3. After heating, limestone releases carbon dioxide (CO2) into quicklime.

The common name of quicklime is lime, and the scientific name is calcium oxide (CaO). Because of its water absorption, quicklime is often used as a desiccant for packaging food. Adding water will produce a lot of heat. There is a product called lazy hot pot, which allows you to eat hot hot pot without plugging in or firing. The secret weapon of this hot pot is to add water to lime powder to make it produce an exothermic reaction. 15 minutes can make a meal!

When quicklime is added with water, it will become "hydrated lime", also called hydrated lime, and its scientific name is calcium hydroxide Ca(OH)2. It is usually used to draw white lines on construction sites or to improve polluted and acidified soil. The solution of slaked lime is lime water, which is often used to check the presence of carbon dioxide. When carbon dioxide enters clear limewater, calcium carbonate (CaCO3) will precipitate, making limewater turbid.

Natural limestone is formed by calcium carbonate (CaCO3), which is found in many places in daily life, such as eggshells, shells, marble, cement and coral reefs. In addition, in different weather or temperature, calcium carbonate (CaCO3) may precipitate into solid, and stalactites will be formed over time!