Ethnoic Acid


 
 
Concept Explanation
 

Ethnoic Acid

Ethanoic Acid or Acetic Acid:

commonly known as acetic acid. Its formula is CH3COOH. 5-8% solution of ethanoic acid in water is known as vinegar.

Physical Properties:

Its melting point is 290 K. During winters it often freezes and forms ice like flakes, so it is also called glacial acetic acid. Glacial acetic acid is a trivial name for water free (anhydrous) acetic acid. It is a weaker acid than HCI but stronger than alcohol.

Chemical Reactions:

a)   Acidity: Weak acidity of acetic acid as compared to HCl is because of its low ionisation but is more acidic than alcohol is because of the more stability of ion formed after the removal of a proton (H+). It evolves hydrogen gas when reacts with sodium metal.

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Sample Questions
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Question : 1

Which of the following gas is evolved when Ethanoic Acid reacts with Sodium metal ?

Right Option : A
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Question : 2

Which of the following is also known as Ethanoic Acid ?

Right Option : B
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Question : 3

Which of the following are correct :

(a) Acetic acid is also known as Ethanoic Acid.

(b) CH3COOH is the Scientific formula of Ethanoic Acid.

(c) Hydrogen gas is evolved when Ethanoic Acid reacts with Sodium metal.

Right Option : D
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