Explain lanthanum(iii) fluoride

Reference no: EM13561255

Fluoride ion ( F-) is added to drinking water to help prevent cavities. Federal guidelines suggest the level should not exceed 4.0 mg F-/L (4.0 ppm) to be effective. F- is analyzed in water by precipitation with La(NO3)3.

A 10.0 L sample of drinking water produces 0.1332 g of lanthanum(III) fluoride when excess La(NO3)3 soluton is added. What is the amount of F- in the water, in mg/L?

Reference no: EM13561255

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