Henry's Law
The concentration of a gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid.
Formula
Variables
Example
A fizzy drink loses its CO₂ once opened because the pressure above the liquid drops.
Did You Know?
Henry's law explains the 'bends' — nitrogen dissolved in a diver's blood bubbles out if they surface too fast.
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More in Scientific Laws & Principles
View allLaw of Conservation of Mass
BasicIn a closed system, matter is neither created nor destroyed — the total mass before a reaction equals the total mass after.
Law of Definite Proportions
BasicA given chemical compound always contains its component elements in the same fixed ratio by mass, regardless of source.
Law of Multiple Proportions
IntermediateWhen two elements form more than one compound, the masses of one element combining with a fixed mass of the other are in ratios of small whole numbers.
Dalton's Law of Partial Pressures
IntermediateThe total pressure of a mixture of non-reacting gases equals the sum of the partial pressures each gas would exert alone.
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IntermediateThe rate at which a gas effuses through a tiny hole is inversely proportional to the square root of its molar mass.
Avogadro's Law
BasicAt the same temperature and pressure, equal volumes of gases contain equal numbers of molecules — so volume is proportional to moles.