Question

Observe the diagram given below and answer the questions:

1. Name the reactants in this reaction.
2. Which gas comes out as effervescence in the bigger test tube?
3. What is the colour change in the lime water?
4. In the above experiment instead of sodium carbonate which chemical can be used to get same products?
5. Write the use of acetic acid.

Answer 1

1. The reactants are acetic acid CH₃COOH and sodium carbonate Na₂CO₃.
2. The gas produced is carbon dioxide CO₂.
3. When carbon dioxide gas is passed through lime water, it turns lime water milky or cloudy due to the formation of calcium carbonate. Therefore, the colour change in the limewater would be from clear to milky.
4. In the above experiment, instead of sodium carbonate, sodium bicarbonate can be used to get the same products.
5. Acetic acid is widely used in the culinary arts as a key ingredient in vinegar. It is also used industrially as a chemical reagent for the production of chemical compounds, in the manufacture of plastics, and in the food industry as a preservative and flavouring agent.