The measure of the amount of dissolved salts in a liquid is called salinity.

Here's a breakdown:

* Salinity is a measure of the total amount of dissolved salts in a given mass of water.

* It is typically expressed in parts per thousand (ppt) or grams of salt per kilogram of water (g/kg).

* Salinity is a crucial factor in the density, freezing point, and other properties of water.

* It is particularly important in understanding the properties of seawater, which has a salinity of around 35 ppt.

Let me know if you have any other questions.