Neutralization (chemistry)
![Animation of a strong acid–strong base neutralization titration (using phenolphthalein). The equivalence point is marked in red.](/Images/godic/202412/19/Titolazione2624.gif")
![Titration curves for addition of a strong base to a weak acid with pKa of 4.85. The curves are labelled with the concentration of the acid.](/Images/godic/202412/19/Weak_acid_titrations2624.png")
In chemistry, neutralization or neutralisation (see spelling differences), is a chemical reaction in which an acid and a base react quantitatively with each other. In a reaction in water, neutralization results in there being no excess of hydrogen or hydroxide ions present in solution. The pH of the neutralized solution depends on the acid strength of the reactants. Neutralization is used in many applications.