Chemistry · Interactive Lab
Mr. C’s
Chem Lab
A library of chemistry tools I built for my students — simulations, calculators and practice sets that open in your browser and skip straight to the part that makes it click.
- Apps live
- 9
- Topics covered
- 8
- Access
- Free & open
Fig. 01 — crystal lattice, hexagonal
Apps Library
Every app, one click away
Filter by topic and open any app in a new tab. No install or sign up necessary!
Nucleus Decay Lab
Pick any element to see the protons, neutrons and electrons it is built from, then slow time down and watch alpha, beta or gamma decay break the nucleus apart with real half-lives and energies.
Electron Configuration Drill
Endless practice writing configurations and orbital diagrams, with instant feedback on every answer.
VSEPR Shape Builder
Add bonding pairs and lone pairs, then rotate the molecule to check the geometry and bond angles.
Molar Mass Calculator
Type a formula, get molar mass, percent composition and the empirical formula of any compound.
Limiting Reactant Simulator
Drag amounts of each reactant into the beaker and watch which one runs out first and why.
Solubility Rules Sorter
Predict whether a precipitate forms, then check your reasoning against the solubility rules.
Titration Curve Lab
Set acid strength and concentration, then add base drop by drop to build the full titration curve.
Ideal Gas Law Bench
Hold any two variables constant and see how pressure, volume, moles and temperature respond.
Calorimetry Calculator
Enter masses and temperature changes to find heat transferred, then compare against your lab data.
The lab supervisor
About the lab
I teach chemistry, and I got tired of hunting for tools that did exactly one thing well. So I started building them: small, focused apps that open in a browser, run on a Chromebook, and get a class to the interesting part in under a minute.
Everything here is free for my students to use. Pick a topic, open an app, and bring your questions to class.
— Mr. C