Question

what is the structural formula of ethanoic acid?
What are its physical and chemical properties?
How it can be obtained from ethanol? Give a proper reaction too? ​

Answer 1

Answer:

CH3COOH is the formula of ethanoic acid. Its other name is acetic acid found in vinegar.

Physical properties: Properties that do not change the chemical nature of matter

Chemical properties: Properties that do change that chemical nature of matter

With the definitions of each term in mind, here are some examples.

Chemical Properties

* iron rusting (iron oxide forms)

* gasoline burning (water vapour and carbon dioxide form)

* eggs cooking (fluid protein molecules uncoil and cross link to form a network)

* bread rising (yeast converts carbohydrates into carbon dioxide gas)

* milk souring (sour-tasting lactic acid is produced)

* suntanning (vitamin D and melanin is produced)

Physical Properties

* whipping egg whites (air is forced into the fluid, but no new substance is produced)

* magnetising a compass needle (there is realignment of groups ("domains") of iron atoms, but no real change within the iron atoms themselves).

* boiling water (water molecules are forced away from each other when the liquid changes to vapor, but the molecules are still H2O.)

* dissolving sugar in water (sugar molecules are dispersed within the water, but the individual sugar molecules are unchanged.)

* dicing potatoes (cutting usually separates molecules without changing them.)

For converting ethanol to ethanal, we need mild oxidising agents, so that the conversion stops at ethanal and does not proceed further to give ethanoic acid. Both KMnO4 and K2Cr2O7 are strong oxidising agents and oxidise ethanol to ethanoic acid. However, we have certain oxidising agents such as pyridinium chlorochromate (PCC), which oxidise ethanol to ethanal.