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Answer :
Final answer:
To find how many ounces of 70% calcium hypochlorite to add to 1,000 gallons of water for 100 ppm, convert gallons to liters, find the mass of pure calcium hypochlorite needed, adjust for 70% purity, and convert kilograms to ounces.
Explanation:
To determine how many ounces of 70% calcium hypochlorite must be added to 1,000 gallons of water to yield 100 ppm, we need to use the concentration formula: ppm = (mass of solute in g / volume of solution in L) × 106. First, we convert 1,000 gallons to liters, knowing that 1 gallon = 3.78541 L, which gives us 3785.41 L. Next, we calculate the mass of calcium hypochlorite needed for 100 ppm: (100 × 3785.41) / 106 = 0.378541 kg of pure calcium hypochlorite. Since we have 70% calcium hypochlorite, we need more of the mixture: 0.378541 kg / 0.70. Finally, we convert kilograms to ounces (1 kg = 35.274 oz), finding the answer. This process will determine which of the provided options is correct.
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