It's important to clarify that "salt" doesn't form positive ions by itself. Salt refers to the *ionic compound* produced when an acid and a base react.

Here's how it works:

* Acids donate hydrogen ions (H+) in solution, making them positive (and the solution acidic).

* Bases accept hydrogen ions or donate hydroxide ions (OH-), making them negative (and the solution basic).

Example:

* Hydrochloric acid (HCl) is an acid that donates H+ ions in solution.

* Sodium hydroxide (NaOH) is a base that donates OH- ions in solution.

When they react, they form sodium chloride (NaCl), commonly known as table salt, and water (H2O).

Key points:

* The positive ion in the salt (NaCl) is sodium (Na+), which came from the base (NaOH).

* The negative ion in the salt (NaCl) is chloride (Cl-), which came from the acid (HCl).

So, it's not the "salt" itself that forms the positive ion, but rather the acid that contributes the negative ion (in this case, chloride) to the salt, and the base contributes the positive ion (in this case, sodium).