Question

When you add about 2 mL of acetic acid to a test tube containing an equal amount of distilled water and leave the test tube to settle after. shaking its contents, then after about 5 minutes what will you observe in the test tube:; A. A white precipitate settling at its bottom,; B. A clear colourless solution;; C. A layer of water over the layer of acetic acid, or; D. A layer of acetic acid over the layer of water.(Delhi - 2014)

Answer 1

Answer:

B. A clear colourless solution will be formed

Explanation:

acetic acid is soluble in water and 5-8% of acetic acid in water is vinegar

Answer 2

The observation for the given experiment will be formation of a clear colorless solution. Thus option B is correct.

Explanation:

Given:

• 2 ml of acetic acid is reacted with 2 ml of water.

To find:

• Observation for the reaction between acetic acid and water.

Explanation:

• The concept involved in this scenario is the properties of acetic acid. The following are the major properties of acetic acid ($CH_3COOH$).

1. It is a compound that belongs to the carboxylic acid group and is acidic.
2. It has a strong pungent odor.
3. It is readily dis-solvable in water in any proportions.
4. It changes the color of blue litmus to red.

• As per the given scenario, when we mix an equal amount of ethanoic acid  water the following chemical reaction occurs

$CH_3COOH+H_2O$⇄ $H^++CH_3COO^-$

Conclusion:

• As per the properties of acetic acid, it readily gets dissolved in water, it is inferred that option B is the correct observation for the given experiment.

Learn more about such concept

What are the important properties of ethanoic acid?

(class 10 CBSE SAMPLE PAPER 2017-18 SCIENCE)

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What precautions should be taken while studying the properties of ethanoic acid

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