Phenolphthalein is added to the water and a piece of sodium is thrown. Gas is released, the solution acquires

| April 11, 2021 | education

Phenolphthalein is added to the water and a piece of sodium is thrown. Gas is released, the solution acquires a raspberry color. What type of reaction is this chemical process: 1) exchange 2) substitution 3) compound 4) redox

If a piece of sodium is placed in water with phenolphthalein, then the solution acquires a raspberry color, because an alkali solution is formed. And phenolphthalein is an indicator of an alkaline environment. In this case, hydrogen gas is released:
2Na + 2H2O = 2NaOH + H2.
This is a substitution reaction, since a simple substance and a complex one reacts.
It is redox, because Na (0) gives off 1e and turns into Na (+), acting as a reducing agent; hydrogen is an oxidizing agent, since taking electrons from Н (+) turns into Н2 (0).



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.