How do you achieve a 1% active ingredient mixture using 25% wettable powder?

To achieve a 1% active ingredient mixture using a 25% wettable powder, it is essential to understand how to calculate the amount of the wettable powder required based on its concentration.

In this scenario, the goal is to create a solution where the active ingredient constitutes 1% of the total mixture. This means that for every 100 gallons of the diluted solution, you need 1 gallon of pure active ingredient.

Since the wettable powder is 25% active ingredient, it contains 0.25 gallons of active ingredient per pound. Therefore, to determine how many pounds of the 25% wettable powder are necessary to yield 1 gallon (which is equivalent to 128 ounces) of active ingredient, you can set up the following calculation:

1. Calculate how many pounds of active ingredient you need: 1 gallon equals 128 ounces.

2. Knowing that each pound of wettable powder provides 0.25 gallons of active ingredient, you can find out how many pounds you need by dividing the amount of pure active ingredient desired (1 gallon) by the active ingredient concentration in the wettable powder (0.25 gallons/pound).

Calculation:

1 gallon / 0.25 gallons per pound = 4 pounds