Question

What are the important properties of ethanoic acid?
(class 10 CBSE SAMPLE PAPER 2017-18 SCIENCE)

Answer 1

Solution:
Some important physical properties of ethanoic acid are as follows:

1.Ethanoic acid or acetic acid is a colourless liquid.

2. It is soluble in water, the 5 - 8% solution of Acetic acid in water is called vinegar.

3.Ethanoic acid melts at 290 K and boil at 391 K.

4.It solidifies on cooling to an ice like crystalline solid which looks like a Glacier and hence its name is glacial acetic acid.

5. It produces painful blisters in contact with skin.

6. It  burns in air with a pale blue flame.


Some chemical properties are as follows:

1.Action on Litmus- Ethanoic acid is a weak acid in nature. It turns blue Litmus red.

2. Reaction with alkalis: ethanoic acid reacts with alkalis or bases to from Salt and water.

CH3COOH + NaOH -----> CH3COONa + H2O

3. Reaction with alcohol: When ethanoic acid is heated with an alcohol in the presence of concentrated H2SO4 an ester is formed. This is a slow reversible reaction and is called esterification.

CH3COOH + C2H5OH ---Conc. H2SO4→ CH3COOC2H5 + H2O

4. Reaction with carbonates and bicarbonates: ethanoic acid decomposes carbonates and bicarbonates producing a salt, carbon dioxide and water

2CH3COOH + Na2CO3 -----> 2CH3COONa + H2O + CO2

CH3COOH + NaHCO3 -----> CH3COONa + H2O+ CO2

HOPE THIS WILL HELP YOU....