A compound formed from an acid and a base during a neutralization reaction is called what?

A compound formed from an acid and a base during a neutralization reaction is called a salt. In a neutralization reaction, the acid donates protons (H⁺ ions) and the base donates hydroxide ions (OH⁻). When these two combine, they form water (H₂O) and a salt.

Salts are a broad category of compounds that can be formed from the reaction of acids and bases, and they typically consist of a cation from the base and an anion from the acid. For instance, if hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH), the resulting salt is sodium chloride (NaCl), along with water.

The other options refer to different concepts: a solution is a homogeneous mixture, hydronium ions are formed when an acid is dissolved in water, and hydroxide ions are characteristic of bases. None of these represent the compound formed from the neutralization process itself.