Salt on Ice

Dissolved particles shift boiling and freezing

An interactive lesson with 7 steps, about 6 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• Freezing-point drop and boiling-point rise depend on the number of dissolved particles.
• ΔT_f = 1.86 °C × m × i for water.
• Osmotic pressure Π = icRT pulls water towards more particles.

Steps

1. Counting particles
2. Salted water
3. De-icing the road
4. Antifreeze
5. Osmosis
6. Water through a membrane
7. The pressure in your cells