Sodium fluoride is added to drinking water in some municipalities to protect teeth against cavities. The target is to convert hydroxyapatite, Ca₁₀(PO₄)₆(OH)₂, into more stable fluorapatite, Ca₁₀(PO₄)₆F₂. The U.S. Environmental Protection Agency currently restricts the concentration of fluoride in drinking water to 4 mg/L. Express this concentration in parts per million (ppm).

Question

Quizplus · Accepted Answer

The Answer of Sodium fluoride is added to drinking water in some municipalities to protect teeth against cavities. The target is to convert hydroxyapatite, Ca₁₀(PO₄)₆(OH)₂, into more stable fluorapatite, Ca₁₀(PO₄)₆F₂. The U.S. Environmental Protection Agency currently restricts the concentration of fluoride in drinking water to 4 mg/L. Express this concentration in parts per million (ppm).

Sodium Fluoride Is Added to Drinking Water in Some Municipalities