To disinfect a 700,000-gallon tank with 50 mg/l of chlorine, how much 65% HTH will be needed?

To disinfect a 700,000-gallon tank with 50 mg/l of chlorine, how much 65% HTH will be needed?

• A. 249.07 lbs
• B. 349.07 lbs
• C. 449.07 lbs
• D. 549.07 lbs

Answer: (C)

To determine how much 65% HTH (Calcium Hypochlorite) is needed to achieve a concentration of 50 mg/l of chlorine in a 700,000-gallon tank, it's important to first convert the desired concentration of chlorine from mg/l to pounds. We start by calculating the total amount of chlorine required for the tank. Since there are 1 million milliliters in a gallon, a 700,000-gallon tank contains 700,000,000 milliliters. At 50 mg/l, we can calculate the total chlorine needed using the following steps: 1. Convert the volume of water from gallons to liters: \[ 700,000 \text{ gallons} \times 3.78541 \text{ liters/gallon} = 2,651,000 \text{ liters} \] 2. Calculate the total chlorine in mg: \[ 50 \text{ mg/l} \times 2,651,000 \text{ liters} = 132,550,000 \text{ mg} \] 3. Convert mg to pounds (there are 453,592 mg in a pound): \[ 132,550

To determine how much 65% HTH (Calcium Hypochlorite) is needed to achieve a concentration of 50 mg/l of chlorine in a 700,000-gallon tank, it's important to first convert the desired concentration of chlorine from mg/l to pounds.

We start by calculating the total amount of chlorine required for the tank. Since there are 1 million milliliters in a gallon, a 700,000-gallon tank contains 700,000,000 milliliters. At 50 mg/l, we can calculate the total chlorine needed using the following steps:

1. Convert the volume of water from gallons to liters:

[

700,000 \text{ gallons} \times 3.78541 \text{ liters/gallon} = 2,651,000 \text{ liters}

]

2. Calculate the total chlorine in mg:

[

50 \text{ mg/l} \times 2,651,000 \text{ liters} = 132,550,000 \text{ mg}

]

3. Convert mg to pounds (there are 453,592 mg in a pound):

[

132,550