Utah Structural and Health Related Pest Practice Test & Study Guide

To determine how many ounces of a 75% active ingredient formulation are needed to create a 2-gallon mixture at a 1% dilution, start by calculating the total amount of active ingredient required in the final solution.

First, convert 2 gallons into ounces. Knowing that there are 128 ounces in one gallon, the total for 2 gallons is:

2 gallons * 128 ounces/gallon = 256 ounces.

Next, calculate the amount of active ingredient needed for a 1% solution of that 256 ounces:

1% of 256 ounces = 0.01 * 256 = 2.56 ounces.

Since you are using a formulation that is 75% active ingredient, the amount of the 75% solution required to obtain 2.56 ounces of active ingredient can be calculated using this formula:

Amount of formulation required = required active ingredient / (percentage of active ingredient in formulation).

Thus, substitute the values:

Amount of formulation required = 2.56 ounces / 0.75 = 3.41 ounces.

This calculation shows that you need 3.41 ounces of the 75% active ingredient formulation to achieve the desired 1% dilution in a 2-gallon mixture, confirming