What causes the reaction of am acid mixed with a base?

The reaction between an acid and a base is called neutralization, resulting in the formation of water and a salt. This occurs because acids donate protons (H⁺ ions) while bases accept protons (OH⁻ ions), leading to the combination of these ions to produce water (H₂O). The remaining ions form the salt. This exothermic reaction releases energy, often resulting in a temperature change.