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A liquid feeder applies a 4% saturated sodium fluoride solution to drinking water. This liquid feeder...

A liquid feeder applies a 4% saturated sodium fluoride solution to drinking water. This liquid feeder increases the fluoride concentration from the natural background level of 0.4 mg F/liter to 1 mg F/liter. The commercial sodium fluoride powder contains 45% F by weight. Determine: 1. The pounds of NaF required per million gallons of water treated. 2. The dosage of 4% NaF solution per million gallons.

engineering   Civil-Engineering   
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→ Given! ori de olufion Qǐ@lid Jeedeo-in c91equedfrom 0.4 → 1m, concentolation = 1-09 0% oundis of NAF 9tequured CNAF) pouind : 0.6 × 10X 3.7s5 ouncls d、15% contains . = o. 서5 × 5 ! Odage af 21% Nar 2부 5 pounds

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