Question

discuss the methods of preparation and properties of glycerol ​

Answer 1

Water is a transparent, tasteless, odorless, and nearly colorless chemical substance, which is the main constituent of Earth's streams, lakes, and oceans, and the fluids of most living organisms. It is vital for all known forms of life, even though it provides no calories or organic nutrients. Its chemical formula is H2O, meaning that each of its molecules contains one oxygen and two hydrogen atoms, connected by covalent bonds. Water is the name of the liquid state of H2O at standard ambient temperature and pressure. It forms precipitation in the form of rain and aerosols in the form of fog. Clouds are formed from suspended droplets of water and ice, its solid state. When finely divided, crystalline ice may precipitate in the form of snow. The gaseous state of water is steam or water vapor. Water moves continually through the water cycle of evaporation, transpiration(evapotranspiration), condensation, precipitation, and runoff, usually reaching the sea.
Water covers 71% of the Earth's surface, mostly in seas and oceans.[1] Small portions of water occur as groundwater (1.7%), in the glaciers and the ice capsof Antarctica and Greenland (1.7%), and in the air as vapor, clouds (formed of ice and liquid water suspended in air), and precipitation (0.001%).

Answer 2

Answer:

Explanation:

The following are the methods of preparation of glycerol:

Natural production:  Glycerol can be obtained from animal as well as plant sources. It is present in them in the form of triglycerides. The hydrolysis, transesterification or saponification of these triglycerides produces the glycerol.

The plant source includes the palm trees and soybeans. The animal source includes the animal derived tallow.

Synthetic production:  Glycerol can also be obtained from propylene.

The propylene is a petrochemical compound. The epichlorohydrin is the process of preparation of glycerol from propylene. The propylene chlorination gives allyl chloride which can be oxidized to hypochlorite then to dichlorohydrins which produced epichlorohydrin on reaction with the strong base.

The epichlorohydrin can be hyrolyzed to give the glycerol.

Properties of glycerol: It is a odorless, colorless and viscous liquid. It is sweet in taste. It is non-toxic in nature. It's boiling point is 290 degree Celsius. It's melting point is 17.9 degree Celsius. It has a molecular weight of  92.094 g/mol. It has a relative density of 1.261 g/ml.  The glycerol is soluble in volatile oils and it is miscrible in water. It is acidic in nature and reacts with the alkaline hydroxide.