Question

What is brisk effervesces....
Give reaction also?????

Answer 1

Hey,

“Brisk effervescence” means the evolution of
gases quickly from a solution.
When Ethanoic acid reacts with Sodium Hydrogen Carbonate brisk effervescence takes place due to the evolution of CO2 gas...
Reaction :-
2CH3COOH + Na2CO3 ——> 2CH3COONa + CO2 + H2O

Hope this helps u. .. :))
Plz mark it as brainliest......

Answer 2

Brisk effervescence means the formation of rapid bubbles in a solution due to the liberation of a gas.

Many gases' liberation can produce effervescence but according to 10th std syllabus , CO2 is the gas commonly having the feature of effervescence.

This CO2 is tested by passing it through lime water and turning it milky.
Or the evolved CO2 is introduced to a burning flame and the flame is extinguished.


Mostly CO2 is produced during reaction of acids with metal carbonates or metal hydrogen carbonates.
It could be any acid , a strong acid or a weak acid.

For Example,
METAL HYDROGEN CARBONATE
Strong acid
HCl + NaHCO3 ------> NaCl + CO2 + H2O.
Weak acid
CH3COOH + NaHCO3 ------> CH3COONa + CO2 + H2O.

METAL CARBONATE
Strong acid
2HCl + Na2CO3 ------> 2NaCl + CO2 + H2O.
Weak acid
2CH3COOH + Na2CO3 ------> 2CH3COONa + CO2 + H2O.

As you can see the reaction takes place in a similar manner as in case of metal carbonate and metal hydrogen carbonate.
Even the products of salt,H2O,CO2 are produced.

Thus we can conclude that Acid + natal carbonate/hydrogen carbonate ------> salt + H2O + CO2.


This is the most common way in which CO2 is released and produces effervescence.
Note: Any metal carbonate/Hydrogen carbonate can be used and any acid can be used.


- Maheshwaran.