To create a 1% active ingredient mixture in 100 gallons of water with a 25% wettable powder, how many pounds are needed?

To determine how many pounds of a 25% wettable powder are needed to create a 1% active ingredient mixture in 100 gallons of water, it's important to break down the calculations step by step.

First, calculate the total amount of active ingredient required for a 1% concentration in 100 gallons of solution. A 1% mixture means there is 1 pound of the active ingredient for every 100 pounds of the total mixture. Since 100 gallons of water weighs approximately 833 pounds (given that a gallon of water weighs about 8.33 pounds), we want to find 1% of this total weight:

1% of 833 pounds = 0.01 x 833 = 8.33 pounds of active ingredient needed.

Now, since the wettable powder is 25% active ingredient, we need to find out how much of the wettable powder is required to yield 8.33 pounds of active ingredient. This can be done using the formula:

Active ingredient = (Concentration) x (Amount of wettable powder)

Where:

• Active ingredient = 8.33 pounds

• Concentration = 25% or 0.25

Rearranging to find the amount of wettable