Equilibrium Lab: Water Autoionization

Practice predicting shifts at the molecular level

How it Works

The Equation:
2H2O + heat ⇌ H3O+ + OH
Endothermic: Heat is a reactant. Increasing Temp shifts equilibrium right.
Le Châtelier: Adding ions creates "stress." The system reacts to restore equilibrium.
Challenge Mode
Prediction Time!
The numbers are hidden. Use the particles to guess the shift.
Neutral Solution
pH
7.00
Temp
25°C
[H₃O⁺]
1.00 × 10-7
[OH⁻]
1.00 × 10-7

Challenge Guide

1. Move a slider.
2. Look at the speed and color of the particles in the beaker.
3. Predict if the pH went up or down.
4. Click Reveal to check your chemistry knowledge!

Ion Comparison (Log Scale)

pH vs. Temperature