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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`
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संबंधित प्रश्न
While studying saponification reaction for the preparation of soap, a teacher suggested to a student to add a small quantity of common salt to the reaction mixture. The function of common salt in this reaction is to
(A) reduce the alkalinity of the soap
(B) reduce the acidity of the soap
(C) enhance the cleansing capacity of soap
(D) favour precipitation of soap
Complete the following chemical equations:
C2H5OH+CH3COOH`("conc."H_2SO_4)/`>
Complete the following chemical equations : C2H5OH`("Conc."H_2SO_4)/(443K)`>
What is the common name of ethanoic acid?
Three organic compounds A, B and C have the following molecular formulae: C4H10O
Which compound contains a carboxyl group? Write its name and structural formula.
What happens when propanoic acid is warmed with methanol in the presence of a few drops of concentrated sulphuric acid? Write equation of the reaction involved.
The substance which can produce brisk effervescence with baking soda solution is:
(a) ethanol
(b) vegetable oil
(c) vinegar
(d) soap solution(b) hydrocarbon ends directed towards the centre and ionic ends directed outwards
In a soap micelle, the soap molecules are arranged radially with the hydrocarbon ends, i.e. hydrophobic, directed towards the centre; and, ionic ends, i.e. hydrophilic, directed outwards.
While studying saponification reactions, the following comments were noted down by the students :
(I) Soap is a salt of fatty acids.
(II) The reaction mixture is basic in nature.
(III) In this reaction heat is absorbed.
(IV) This reaction is not a neutralisation reaction.
Which of these are the correct comments ?
(A) I and III only
(B) I, II and III
(C) II, III and IV
(D) I and II only
Choose the correct answer:
Select the acid which contains four hydrozen atoms in it.
Identify the term or substance based on the descriptions given below:
Hydrocarbon containing a triple bond used for welding purposes
