How do you calculate chemical dosing rate?

To calculate the chemical dosing rate, you need to know the desired concentration of the chemical in the solution, the flow rate of the solution, and the concentration of the chemical stock solution. The formula is:

Dosing Rate (mg/L) = (Desired Concentration (mg/L) × Flow Rate (L/h)) / Concentration of Stock Solution (mg/L).

This will give you the amount of chemical to be dosed per unit time, typically expressed in milliliters per hour or liters per hour, depending on the concentration of the stock solution.