Run the titration
Hold the tap buttons to release acid. Near the endpoint, switch to single drops and swirl after each one — exactly like the real exam.
Burette reading
Magnified view — read the bottom of the meniscus to the nearest 0.05 cm³.
Results table (KCSE format)
Enter your burette readings for each trial, exactly as you read them from the magnifier. All readings to 2 decimal places, ending in 0 or 5.
| Trial 1 | Trial 2 | Trial 3 | |
|---|---|---|---|
| Final reading (cm³) | |||
| Initial reading (cm³) | |||
| Volume used (cm³) | — | — | — |
Calculate the concentration of NaOH
The burette contained hydrochloric acid of concentration 0.100 M. The flask contained 25.0 cm³ of sodium hydroxide of unknown concentration.
Step 1. Your average titre (cm³):
Step 2. Concentration of NaOH (M, to 3 decimal places):
KCSE-style questions
What is this?
This is a virtual chemistry laboratory. It simulates the acid-base titration practical from KCSE Chemistry Paper 3, so you can practise the full procedure — releasing acid, watching the indicator, reading the burette, recording results and calculating concentration — even if your school has no laboratory.
How to do the titration
1) Open the tap to run acid into the flask. 2) Swirl often to mix. 3) When the pink colour starts to fade, slow down to single drops. 4) Stop at the exact drop where the pink disappears and does not return on swirling. 5) Read the burette in the magnifier and record the trial. Do three trials — the first is your rough titration.
Works offline
Once this page has loaded, it works without internet. You can also share the file itself from phone to phone by Bluetooth or any file-sharing app — it never needs a connection again.