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Question
Write the answers to the questions by observing the following figure.
- Write the chemical reaction shown in the figure above in the form of a balanced equation.
- Write the name of the gas coming out of the large test tube in the above chemical reaction.
- Why do small bubbles appear in the small test tube?
- What is the change in colour of lime water?
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Solution
- Balanced equation of the reaction between acetic acid and sodium carbonate is as follows:
\[\ce{\underset{\text{Acetic acid}}{2CH3COOH_{(aq)}} + \underset{\text{carbonate}}{\underset{\text{Sodium}}{Na2CO_{3(s)}}} -> \underset{\text{ethanoate}}{\underset{\text{Sodium}}{2CH3COONa_{(aq)}}} + \underset{\text{Water}}{H2O_{(l)}} + \underset{\text{Carbon dioxide}}{CO2\uparrow}}\] - The gas formed in the large test tube is carbon dioxide (CO2) gas.
- The carbon dioxide gas produced in big test tube passes through bent gas delivery tube to the small test tube containing lime water. Hence, bubbles are seen in the small test tube.
- Lime water turns milky.
RELATED QUESTIONS
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`("Conc."H_2SO_4)/(443K)`>
Write the name and chemical formula of the simplest organic acid.
Give the common name and IUPAC name of C2H5OH.
What happens when ethanoic acid reacts with sodium carbonate? Write chemical equation of the reaction involved.
Describe one reaction of a carboxylic acid.
A neutral organic compound is warmed with some ethanoic acid and a little of conc. H2SO4. Vapours having sweet smell (fruity smell) are evolved. What type of functional group is present in this organic compound?
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.
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(b) Write a chemical equation for the reaction involved.
What do you notice when acetic acid reacts with alkalies?
Acetic acid is a typical acid. Write one equation in case of its reactions with a bicarbonate.
A student takes 2 mL acetic acid in a dry test tube and adds a pinch of sodium hydrogen carbonate to it. He makes the following observations:
I. A colourless and odourless gas evolves with a brisk effervescence.
II. The gas turns lime water milky when passed through it.
III. The gas burns with an explosion when a burning splinter is brought near it.
IV. The gas extinguishes the burning splinter that is brought near it.
The correct observations are:
(A) I, II, and III
(B) II, III and IV
(C) III, IV and I
(D) IV, I and II
A student adds 4 mL of acetic acid to a test tube containing 4 mL of distilled water. He then shakes the test tube and leaves it to settle. After about 10 minutes he observes:
(A) a layer of water over the layer of acetic acid
(B) a layer of acetic acid over the layer of water
(C) a precipitate settling at the bottom of the test tube
(D) a clear colourless solution
On adding NaHCO3 to acetic acid, a gas is evolved which turns lime water milky due to the formation of:
(1) Calcium bicarbonate
(2) Calcium hydroxide
(3) Calcium carbonate
(4) Calcium acetate
Write a balanced chemical equation for the following:
A mixture of sodalime and sodium acetate is heated.
Give balanced chemical equations for the following conversion :
Ethanoic acid to ethyl ethanote
CH3–CH2–CHO : propanal : : CH3–COOH : _______
Ethanoic acid is also known as which of these?
Draw the structural diagram of:
Ethanoic acid
The reaction between acetic acid and sodium carbonate is shown in the following figure.
Answer the questions with the help of a diagram.
- Which gas does come out as effervescence in the big test tube?
- What is the colour change in the lime water present in the small test tube?
- Write the related reaction.
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
