What is the mix ratio for a low level disinfection chlorine bleach solution?

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Multiple Choice

What is the mix ratio for a low level disinfection chlorine bleach solution?

Explanation:
Low-level disinfection with chlorine bleach aims for a surface chlorine concentration in the roughly 100–200 ppm range. Regular household bleach is about 5% sodium hypochlorite, so mixing 2 teaspoons into a gallon of water yields roughly 130 ppm of available chlorine in the final solution. That puts it right in the commonly used low-level disinfection range, balancing effectiveness with safety and reducing the risk of residue or damage. The other options push the concentration into much higher ranges (for example, a larger volume of bleach per gallon would give well over 1000 ppm) or are not the standard dilution associated with low-level disinfection, making 2 teaspoons per gallon the best fit for this purpose.

Low-level disinfection with chlorine bleach aims for a surface chlorine concentration in the roughly 100–200 ppm range. Regular household bleach is about 5% sodium hypochlorite, so mixing 2 teaspoons into a gallon of water yields roughly 130 ppm of available chlorine in the final solution. That puts it right in the commonly used low-level disinfection range, balancing effectiveness with safety and reducing the risk of residue or damage. The other options push the concentration into much higher ranges (for example, a larger volume of bleach per gallon would give well over 1000 ppm) or are not the standard dilution associated with low-level disinfection, making 2 teaspoons per gallon the best fit for this purpose.

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