QuestionMay 30, 2025

A bleach sanitizing solution usually consists of: Equal parts liquid detergent and water. One cup of bleach to one gallon of water. One capful of powdered detergent to one gallon of water. 50-100 ppm of bleach and chlorine.

A bleach sanitizing solution usually consists of: Equal parts liquid detergent and water. One cup of bleach to one gallon of water. One capful of powdered detergent to one gallon of water. 50-100 ppm of bleach and chlorine.
A bleach sanitizing solution usually consists of: Equal parts liquid detergent and water. One cup of bleach to one gallon of water. One capful of powdered detergent to one gallon of water. 50-100 ppm of bleach and chlorine.

Solution
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Answer

Use approximately 0.3785 mL of bleach per gallon of water to achieve 100 ppm. Explanation 1. Calculate the Bleach Concentration To achieve 50-100 ppm of bleach, use the formula for concentration in ppm: **ppm = \frac{\text{mass of solute (mg)}}{\text{volume of solution (L)}}**. Convert one cup of bleach to milliliters (approx. 240 mL), and one gallon of water to liters (approx. 3.785 L). 2. Determine Mass of Bleach Assume bleach density is similar to water (1 g/mL), so 240 mL of bleach is approximately 240 g or 240,000 mg. 3. Calculate ppm Using the formula: **ppm = \frac{240,000 \text{ mg}}{3.785 \text{ L}} \approx 63,428 \text{ ppm}**. This exceeds the desired range of 50-100 ppm. 4. Adjust Bleach Volume To achieve 50-100 ppm, reduce bleach volume. For example, for 100 ppm: **\frac{x \text{ mg}}{3.785 \text{ L}} = 100**, solve for x: **x = 378.5 \text{ mg}**. Convert to mL: **x \approx 0.3785 \text{ mL}**.

Explanation

1. Calculate the Bleach Concentration<br /> To achieve $50-100$ ppm of bleach, use the formula for concentration in ppm: **ppm = \frac{\text{mass of solute (mg)}}{\text{volume of solution (L)}}**. Convert one cup of bleach to milliliters (approx. 240 mL), and one gallon of water to liters (approx. 3.785 L). <br /><br />2. Determine Mass of Bleach<br /> Assume bleach density is similar to water (1 g/mL), so 240 mL of bleach is approximately 240 g or 240,000 mg.<br /><br />3. Calculate ppm<br /> Using the formula: **ppm = \frac{240,000 \text{ mg}}{3.785 \text{ L}} \approx 63,428 \text{ ppm}**. This exceeds the desired range of $50-100$ ppm.<br /><br />4. Adjust Bleach Volume<br /> To achieve $50-100$ ppm, reduce bleach volume. For example, for 100 ppm: **\frac{x \text{ mg}}{3.785 \text{ L}} = 100**, solve for x: **x = 378.5 \text{ mg}**. Convert to mL: **x \approx 0.3785 \text{ mL}**.
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