Experimental observation on physical properties and chemical reaction of metallic sodium

Sodium metal is a common metal element with some unique physical properties and chemical reactions. This paper will introduce some important phenomena and conclusions of metallic sodium through experimental observation.

Soft mass

Experimental observation shows that sodium metal can be cut with a knife, which shows that it is soft in texture.

Low melting point

Sodium metal will melt into shiny pellets during heating, which indicates that its melting point is relatively low.

Water reaction

When sodium metal is added to water, a series of chemical reactions will occur, in which the solution will turn red because the solution after sodium reacts with water will turn red when it meets phenolphthalein.

♂? move

When sodium metal is added to water, it will swim around on the water surface, because sodium metal reacts with water to produce hydrogen.

Low density

Experimental observation shows that metallic sodium will float on the water surface after being added to water, because the density of metallic sodium is less than that of water.

oxidate

When cutting the metal surface with a knife, the metallic luster will darken rapidly, because metallic sodium is easily oxidized by oxygen into sodium oxide.

Sodium peroxide reaction

When sodium peroxide is added to water, the generated gas will ignite the wood strips again and generate sparks, because the reaction between sodium peroxide and water can generate oxygen.