Question

An organic compound with molecular formula C₂H₄O₂.produces brisk effervescence on additionof sodium carbonate /bicarbonate. Answer the following:
a. Identify the organic compound.
b. Write the chemical equation for the above reaction.
c. Name the gas evolved.
d. How will you test the gas evolved?
e. List two important uses of the above compound.

Answer 1

1 ) = Identify the organic compound ?

■ The organic compound is $\textbf{ethanoic acid}$ [ CH3COOH ] , also known as $\textbf{acetic acid}$.


2 ) = Write the chemical equation for the above reaction ?

■ Chemical equation :-

CH3COOH + NaHCO3 => CH3COONa + H2O + CO2.

can be written as ,

When $\textbf{Ethanoic acid}$ react $\textbf{Sodium bicarbonate}$ gives us $\textbf{Sodium acetate}$ , Water and $\textbf{carbon dioxide}$


3 ) = Name the gas evolved ?

■ When reaction occurs $\textbf{Carbon dioxide}$ gas evolved ; as shown in above reaction.


4 ) = How will you test the gas evolved ?

■ When the gas passes over $\textbf{lime water}$ , if it turns $\textbf{milky}$ then the gas will be Carbon dioxide otherwise not.

Hence , presence of carbon dioxide can be tested by $\textbf{Lime water test}$.


5 ) = List two important uses of above compound ?

■ Ethanoic acid is used for making $\textbf{vinegar}$

■ It is also used in the preparation of $\textbf{medicines and perfumes}$.



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Answer 2

1 - Ethanoic acid

2 - CH3COOH + NaHCo3 = CH3COONa + Co2 + H2o

3 - carbon dioxide

4 - It turns milky , when lime water passes through it.

5 - Used in medicine.


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