Properties of Acetic Acid – MeitY OLabs
Properties of Acetic Acid Organic compounds containing carboxyl groups are acidic in nature and generally are called carboxylic acids. Acetic acid, commonly knownvas ethanoic acid, is a carboxylic acid that
is generally present in many fruits. It is a colourless liquid with a sour taste and pungent smell. On cooling, pure acetic acid freezes to form ice- like flakes that look
like a glacier. Due to this property, it is often called as glacial ethanoic acid or glacial
acetic acid. Acetic acid is the main component of vinegar and is used in the preparation
of sausage, pickles, etc. In this experiment, our aim is to study the
different properties of acetic acid like solubility in water, effect on litmus, and reaction with
sodium bicarbonate. The test ‘Solubility in Water’ helps to
determine whether acetic acid is soluble in water, ‘Effect on Litmus’ helps to determine
its acidic nature and ‘Reaction with Sodium Bicarbonate’ helps determine its reaction
with a base. Materials Required Acetic acid, blue litmus paper, sodium bicarbonate, test tube, distilled water, lime water, a
stand with clamp and a dropper. Procedure To find ‘Solubility of Acetic Acid in Water’; pour a few drops of acetic acid into a test
tube using a dropper. Add a small quantity of distilled water into
this test tube containing acetic acid and shake it well. Observe that a homogenous solution is formed that indicates that acetic acid
is soluble in water. To test ‘Effect on Litmus’, pour a few
drops of acetic acid into a test tube using a dropper. Take a blue litmus paper and dip it in the test tube containing the solution.
We can see that blue litmus turns red, which indicates that it is acidic in nature.
To find ‘The Reaction of Acetic Acid with Sodium Bicarbonate’; transfer a small quantity
of sodium bicarbonate into a boiling tube with a spatula.
Clamp the boiling tube and add a few drops of acetic acid into it. Close the mouth of the boiling tube with a double bored cork and insert a bent
tube into it. Now. insert the other end of the bent tube
into the boiling tube containing lime water. You can see that lime water turns milky. Here,
acetic acid reacts with sodium bicarbonate to produce carbon dioxide gas that passes
through bent tube to the boiling tube containing lime water and turns it milky. Precautions Avoid excessive inhaling of acetic acid vapours.
Do not use laboratory burners or open flames in this experiment.