Final answer:
The ratio of sanitizer to water in a solution is known as its concentration. It can be expressed in different ways, such as molarity or molality. In the health sciences, ratio solutions are typically expressed as a proportion.
Step-by-step explanation:
Concentration is a quantitative measure of the relative amounts of solute and solvent present in a solution. It can be expressed in different ways, such as moles per liter (molarity) or moles per kilogram (molality).
In the health sciences, ratio solutions are typically expressed as a proportion, such as 1:1000, where the first number represents the amount of sanitizer and the second number represents the amount of water in the solution.
For example, a 1:1000 ratio solution would mean that for every 1 part of sanitizer, there are 1000 parts of water in the solution.