Which of the following statements is true?

Acids and bases cannot mix together.

Acids and bases will neutralize each other.

Acids, but not bases, can change the pH of a solution.

Acids donate hydroxide ions (OHâ€"); bases donate hydrogen ions (H+).

The correct option is : B. Acids and bases will neutralize each other.

Explanation:

Acid is a proton donor and electron-pair acceptor. Whereas, a base is a hydroxide ion donor and electron-pair donor.

The addition of an acid or a base can affect the pH of a solution. Acids lower the pH of a solution, whereas bases increase the pH of a solution.

The pH of an acidic solution 7.

When equal amounts of acid and base is mixed together, the solution gets neutralized. This is known as Neutralization reaction. The pH of such a solution is neutral (pH = 7).