The ways to say how much solute is in a solution: mass percent, ppm, mole fraction, molarity and molality. Then the solubility of solids and of gases, and Henry's law for a gas above a liquid.
3 lessons, about 1 h 45 min3 simulations11 problems7 practice questionsPython in every lesson
Created by StemPy LabA bottle of vinegar says 5 %. A hospital drip says 0.9 g in 100 mL. A water report says 8 ppb. A laboratory shelf says 12 mol/L. All of them tell you how much solute is in a solution. Each measure suits a different job, and you can change from one to another with a starting amount and the density.
Stir sugar into a cup of tea. After a while the last grains stay at the bottom. The solution is saturated. Dissolving has not stopped: grains leave the solid and rejoin it at the same rate. Temperature changes how much dissolves, and the solubility curve shows by how much.
A fizzy drink hisses when you open it, and its bubbles stream up. Warm water holds less gas than cold water. Henry's law ties the amount of gas in a liquid to the pressure of that gas above it, and explains soft drinks, scuba divers and the climbers on high mountains.
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