Concentration Lab

An interactive lesson in how mass and final volume change concentration. No compounds, protocols or needles required.

Change one thing at a time.

These are fictional classroom quantities, not a mixing protocol.

Model mass: 10 mg

Model final volume: 5 mL

10 mg ÷ 5 mL = 2 mg/mL

Concentration

mg per mL

The illustration is conceptual. Color does not indicate real-world purity, strength or safety.

Double the final volume, keep mass fixed

The concentration halves. The total mass is unchanged; it is spread across more liquid.

Double the mass, keep volume fixed

The concentration doubles. Each milliliter now represents twice the mass.

Double both mass and volume

The ratio stays the same. Concentration depends on the relationship between two quantities, not either number alone.