Go over Henry's law in detail?

Question

Luna Chen · Accepted Answer

You mean the concepts about it? The equation is pretty easy to remember; it's the concepts that could be hard to get.

There are different versions of Henry's law, so if this one is not familiar, tell me.

#s = k_HP#

This version, which is taught at my university, has:

Essentially what this equation says is that the vapor pressure of a gas above the solution increases with increasing solubility. So some of the trends that come from this relationship are:

Do note that other versions (mole fraction version, molality version) of Henry's law are out there, where #k_H# is defined with different units (sometimes even reciprocal to the one I gave).

Noah Aldrich · Answer

undefined Henry's Law states that the amount of gas dissolved in a liquid is directly proportional to the partial pressure of that gas above the liquid, at a constant temperature. Mathematically, it can be expressed as:

$$C = k \times P$$

Where:
- $C$ is the concentration of the gas in the liquid (usually in mol/L or mmol/L).
- $k$ is the Henry's law constant, which is specific for each gas and solvent combination.
- $P$ is the partial pressure of the gas above the liquid.

Henry's Law is applicable to ideal dilute solutions and is often used to describe the behavior of gases dissolved in liquids, such as the dissolution of oxygen in water.