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

Why starch is not soluble in water, Starch  is not  soluble  in  water ...

Starch  is not  soluble  in  water  ?? It forms colloid  in  aqueous medium  called  as micelles.  Iodine reacts with both amylose and amylopectin, but the former produces a co

Method for highly volatile liquid wastes-chemical wastes, For highly volati...

For highly volatile liquid wastes Highly volatile liquid waste could be disposed of by effective ventilation until the liquid completely evaporates. Example: Diethyl ether.

Explain optical specificity, Optical specificity Some enzymes exhibit a...

Optical specificity Some enzymes exhibit absolute optical specificity for at  least a portion  of the substrate molecule. For example, the enzyme maltase catalyzes the hydrolys

Explain sympathetic - nerves system, Explain Sympathetic - Nerves System ...

Explain Sympathetic - Nerves System Sympathetic, as the word suggests, means to sympathize. The body sympathizes during fight, flight and fright reaction. For example, have you

Explains osmotic pressure – functions of plasma proteins, Explains Osmotic ...

Explains Osmotic Pressure – Functions of plasma proteins Plasma proteins exert an osmotic pressure of 25 mm Hg, which helps in maintaining plasma volume. The osmotic pressure e

Characteristic of Light, Does the frequencies of the colors of the light in...

Does the frequencies of the colors of the light increase from red to violet?

Phlebotomy, what is the name of the National organization that sets standar...

what is the name of the National organization that sets standards for phlebotomy procedures?

Prtozoa, advantages and disadvantages of protozoa

advantages and disadvantages of protozoa

Medical terminology, 1. identify ten diagnostic medical term that use diagn...

1. identify ten diagnostic medical term that use diagnostic, note the suffixes and provide the definitions.2. then identify ten related procedural medical terms that use procedural

Explain the structure and functions of liver, Explain the Structure and Fun...

Explain the Structure and Functions of Liver The liver is enclosed in a thin capsule and is completely covered by a peritoneum. The liver is described as having four lobes. As

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