Physico-chemical properties of ascorbic acid, Science

Assignment Help:

Ascorbic acid possesses following important physico-chemical properties:

a)  It  is a white crystalline  substance.

b)  It  is freely soluble in water.

c)  Solution of the vitamin tastes sour.

d)  In  dry condition  it is stable in air and light.

e)  It  is fairly stable in cold acid solution.

f)  In an aqueous medium, particularly alkaline, it is easily oxidized on exposure to heat, light and traces of metals such as copper or silver.

g)  It  is easily destroyed during cooking.

h)  The compound  is a powerful  reducing agent and can  reduce fehling's solution. This is due to the presence of en01 group (carbons 2 and 3) in  its structure. (You have already learnt about the enol group in the carbohydrate Unit  I).

i)  Vitamin  C  also reduces  2,  6-dichlorophenolindophenol  to a colourless  leuco compound. This reaction  is very commonly utilized  for chemical  estimation of the vitamin.

 


Related Discussions:- Physico-chemical properties of ascorbic acid

Illustrating an eclipse of the sun, Illustrating an eclipse of the sun ...

Illustrating an eclipse of the sun Hold a small coin a few inches from one eye and close the other eye while looking at the lighted electric bulb on the ceiling of a room. The

Nutrients, which nutrient contains carbon, hydrogen, oxygen, nitrogen and s...

which nutrient contains carbon, hydrogen, oxygen, nitrogen and sometimes sulphur and phosphorus?

Useful instruction for attending to emergency situations, Useful Instructio...

Useful Instruction : In the table given below, you can find references to the locations of materials related to this exercise. You are advised to go through these materials to und

Emergence of science, Emergence of Science: We gave you a glimpse of ...

Emergence of Science: We gave you a glimpse of  the social structure in  India during the Iron Age. With the emergence of ordered urban societies, the stage was set for a tre

Introduction to identification of compressed gases , INTRODUCTION : You wo...

INTRODUCTION : You would recall from your study of Unit 11 that LPG (liquefied petroleum gas) and other compressed gases can pose a danger in the lab. The gas (LPG) supply distrib

Science, #qpecifically, they want to find two separate locations: one where...

#qpecifically, they want to find two separate locations: one where shallow, large magnitude earthquakes are frequently found, and one where large steep volcanoes that have explosiv

Gloves for personal protective devices, Gloves : Gloves should be worn whe...

Gloves : Gloves should be worn when transferring toxic, radioactive and carcinogenic compounds, irritants and corrosive liquids. The practice of wearing rubber gloves continuously

Motion in one dimension, what is the speed and velocity of a car that trave...

what is the speed and velocity of a car that travels 32 meters to the east and 12 meters in the same direction? the total time of travel in 3.0 seconds

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd