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Water is said to be the universal solvent substantiate

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Water is considered the universal solvent due to its unique properties:

1. Polarity:
- Water molecules are polar, meaning they have a slight positive charge at one end (hydrogen atoms) and a slight negative charge at the other (oxygen atom).

2. Hydrogen Bonding:
- Water molecules form hydrogen bonds with themselves and with other polar molecules. These bonds are weak electrostatic interactions that hold molecules together.

3. High Dielectric Constant:
- Water has a high dielectric constant, which means it can weaken the electrostatic forces between ions. This allows ions to dissolve more easily in water.

4. Extensive Hydrogen Bonding Network:
- Water molecules form an extensive three-dimensional network of hydrogen bonds that can accommodate a wide range of solutes.

5. Cohesive and Adhesive Properties:
- Water's cohesive properties (attraction between water molecules) allow it to flow and maintain its liquid state. Its adhesive properties (attraction to other surfaces) enable it to dissolve substances on various surfaces.

Substantiating Evidence:

- Dissolution of Ionic Compounds: Water can dissolve ionic compounds by surrounding the ions and weakening the electrostatic forces between them.
- Hydrolysis Reactions: Water can react with certain substances to form new compounds, such as salts, bases, and acids.
- Solvents for Polar Molecules: Water can dissolve many polar molecules, such as alcohols, sugars, and proteins.
- Biological Processes: Water is essential for all life forms and plays a crucial role in cellular processes.
- Industrial Applications: Water is used as a solvent in various industries, including chemical production, food processing, and pharmaceuticals.

Exceptions:

While water is known as the universal solvent, there are a few exceptions:

- Nonpolar Compounds: Nonpolar compounds, such as hydrocarbons, do not dissolve in water due to their lack of polarity.
- Certain Ionic Compounds: Some ionic compounds, such as barium sulfate and calcium oxalate, have extremely low solubility in water due to their strong ionic interactions.
- Macromolecules: Some large macromolecules, such as cellulose and rubber, are insoluble in water due to their size and complex structures.
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