Why lower carboxylic acids are soluble in water?

Explanation

### Step-by-Step Solution:

1. **Understanding Carboxylic Acids**: Carboxylic acids are organic compounds that contain a carboxyl group (-COOH). The solubility of these acids in water depends on their molecular structure, particularly the length of their carbon chain.

2. **Lower Carboxylic Acids**: Lower carboxylic acids, such as formic acid (1 carbon) and acetic acid (2 carbons), have relatively short carbon chains. This allows them to interact more effectively with water molecules.

3. **Hydrogen Bonding**: The carboxyl group (-COOH) can form hydrogen bonds with water. In lower carboxylic acids, the -COOH group can form strong hydrogen bonds with the water molecules. This interaction is crucial for solubility.

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