When instructed to make a 1/4% concentration of surfactant in a 1000-gallon tank, how many quarts should be added?

• A. 5 quarts
• B. 10 quarts
• C. 15 quarts
• D. 20 quarts

Answer: (B)

To determine how many quarts of surfactant to add in order to make a 1/4% concentration in a 1000-gallon tank, you first need to convert the percentage into a more manageable form for calculations.

A 1/4% concentration means that there is 1/4 ounce of surfactant in every 100 ounces of solution. Since there are 128 ounces in a gallon, there are 128,000 ounces in 1000 gallons (1000 gallons x 128 ounces/gallon).

Next, calculate 1/4% of the total volume in ounces:

[

1/4% = 0.0025

]

[

0.0025 \times 128,000 \text{ ounces} = 320 \text{ ounces}

]

Now, convert ounces into quarts. There are 32 ounces in a quart:

[

320 \text{ ounces} \div 32 \text{ ounces/quart} = 10 \text{ quarts}

]

Therefore, when aiming for a 1/4% concentration of surfactant in a 1000-gallon tank, 10 quarts of surfactant should be added to