Put some calcium oxide (quicklime) in a test tube and add water. Place the test tube upside down

univerkov | April 18, 2021 | education

Put some calcium oxide (quicklime) in a test tube and add water. Place the test tube upside down in the palm of your hand. What do you feel? What external signs are accompanied by this reaction, make its equation, knowing that calcium hydroxide is formed.

Calcium oxide CaO – quicklime. When “quenching” (pouring water to the oxide), a very violent reaction occurs, accompanied by hissing, “boiling” of the substance, a large amount of heat is released, which can be felt by placing the test tube upside down in the palm of your hand.

As a result of the reaction, after the “quenching” of calcium oxide with water, “slaked lime” – calcium hydroxide is formed.

CaO + H2O = Ca (OH) 2.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.