The process you are referring to is called neutralization. Neutralization is a chemical reaction in which an acid and a base react in such a way that the resulting solution is neither acidic nor basic. The products of a neutralization reaction are typically a salt and water.

The general equation for a neutralization reaction is:

$$\text{Acid} + \text{Base} \rightarrow \text{Salt} + \text{Water}$$

For example, when hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH), the products are sodium chloride (NaCl) and water.

$$\text{HCl} + \text{NaOH} \rightarrow \text{NaCl} + \text{H}_2\text{O}$$

Neutralization reactions are important in many everyday applications, such as the manufacture of antacids and the treatment of acid rain.