Here's why:

* Citric acid is an organic acid with a molecular structure that allows it to form hydrogen bonds with water molecules. These bonds are strong and contribute to its high solubility.

* Salt (sodium chloride) is an ionic compound. While it dissolves in water, it doesn't form as many strong bonds with water molecules as citric acid does.

Solubility Comparison:

* Citric acid: ~1000 g/L at 25°C (highly soluble)

* Salt (NaCl): ~357 g/L at 25°C (moderately soluble)

In summary: Citric acid's ability to form strong hydrogen bonds with water molecules makes it significantly more soluble in water than salt.