Neutralization Reaction Simulation

Choose an acid and a base, add particles to the beaker, and watch neutralization happen only when hydrogen ions and hydroxide ions collide.

pH

7.0

Neutral solution

Excess ions

0

H+ and OH- are balanced

Water formed

0

Only forms after H+ and OH- collide

Acid
H+

Base
OH-

0

7

14

Choose solutions

Acid Hydrochloric acid, HCl Nitric acid, HNO₃ Sulfuric acid, H₂SO₄ Acetic acid, CH₃COOH Base Sodium hydroxide, NaOH Potassium hydroxide, KOH Calcium hydroxide, Ca(OH)₂ Ammonium hydroxide, NH₄OH

Add acid Add base Dilute with water Reset

Amount added each click

2 units

One unit means one formula unit of the selected acid or base. H₂SO₄ adds two H⁺ ions. Ca(OH)₂ adds two OH⁻ ions.

Reaction model

H⁺ + OH⁻ → H₂O

HCl adds H+ and Cl-. NaOH adds Na+ and OH-.

H⁺ acid ion

OH⁻ base ion

H₂O formed

Cation

Anion

pH meter

The solution is neutral because H+ and OH- are balanced.

Student checks

1. Which particles actually make water?
2. Which particles are left floating in solution after neutralization?
3. How does changing from HCl to H2SO4 affect the amount of H+ added?