Advertisements
Advertisements
प्रश्न
When ethanoic acid reacts with sodium hydrogen carbonate, then a salt X is formed and a gas Y is evolved. Name the salt X and gas. Y Describe an activity with the help of a labelled diagram of the apparatus used to prove that the evolved gas is the one which you have named. Also write the chemical equation of the reaction involved.
उत्तर
When ethanoic acid reacts with sodium hydrogen carbonate, a brisk effervescence of carbon dioxide gas (Y) is evolved. The salt (X) formed as a result of this reaction is sodium ethanoate.
Let's react ethanoic acid with sodium hydrogen carbonate.
(1) Take a boiling tube and add 0.5gm of sodium hydrogen carbonate to it. To this, add 2 ml of dilute ethanoic acid through a thistle funnel.
(2) You will notice a brisk effervescence of carbon dioxide gas.
(3) Take a test tube containing lime water and pass the carbon dioxide gas through it.
(4) You will observe the lime water turning milky. Carbon dioxide is the only gas which turns lime water milky.
This activity proves that carbon dioxide gas is evolved when ethanoic acid reacts with sodium hydrogen carbonate.
The diagram of the entire experiment is shown below:
The chemical equation of the above reaction is as follows:
`CH_3 COOH + NaHCO_3 -> CH_3 COONa+ CO_2 + H_2 O`
APPEARS IN
संबंधित प्रश्न
When you add a few drops of acetic acid to a test-tube containing sodium bicarbonate powder, which one of the following is your observation?
(A) No reaction takes place
(B) A colourless gas with pungent smell is released with brisk effervescence
(C) A brown coloured gas is released with brisk effervescence
(D) Formation of bubbles of a colourless and odourless gas
Fill in the blanks from the choices given within brackets:
The basicity of acetic acid is-------- (3, 1, 4).
Draw the structure of butanoic acid.
An organic acid X is a liquid, which often freezes during winter time in cold countries, having the molecular formula C2H4O2. On warming it with methanol in the presence of a few drops of concentrated sulphuric acid, a compound Y with a sweet smell is formed.
(a) Identify X and Y. Also write their formulae showing the functional group present in them.
(b) Write a chemical equation for the reaction involved.
Which of the following observations is true about dilute solution of acetic acid?
(A) It smells like vinegar and turns red litmus blue
(B) It smells like onion and turns blue litmus red
(C) It smells like orange and turns red litmus blue
(D) It smells like vinegar and turns blue litmus red
What is the action of acetic acid with litmus paper?
Write a balanced chemical equation for the following:
Monochloroethane is hydrolysed with aqueous KOH.
Draw the structure formula of ethyne.
What are catalysts?
Give the balanced chemical equation of the following reaction:
Oxidation of ethanol by acidified potassium dichromate.
