Chemistry Sim · Acid-Base Titration
Add base drop by drop and observe the pH curve. Find the equivalence point where the indicator flashes pink.
The burette drips base into the acid flask. Watch the color and the pH curve.
Adjust concentrations, choose an indicator, and add drops.
The equivalence point is where moles of acid exactly equal moles of base. For a strong acid + strong base titration, this occurs at pH 7. The indicator changes color near this point to signal the endpoint.
Near the equivalence point, the solution is a buffer that resists pH change — until it suddenly can't anymore. One extra drop of base causes a massive pH swing from ~3 to ~10. That's the steep part of the curve.
Check yourself