Question

In: Chemistry

It is recommended that drinking water contain 1.6 ppm of fluoride. If the local reservoir has...

It is recommended that drinking water contain 1.6 ppm of fluoride. If the local reservoir has a diameter of 450.0 m and a depth of 10.0 m (V= Pi*r2 *h), how many grams of F should be added to the water in the reservoir to give the recommended concentration? If fluoride is provided by hydrogen hexafluorosilicate (H2SiF6), how many grams of H2SiF6 contain Fluoride?

Solutions

Expert Solution


Related Solutions

To aid in the prevention of tooth decay, it is recommended that drinking water contain 1.10...
To aid in the prevention of tooth decay, it is recommended that drinking water contain 1.10 ppm fluoride (F–). (a) How many grams of F– must be added to a cylindrical water reservoir having a diameter of 4.03 × 102 m and a depth of 55.43 m? (b) How many grams of sodium fluoride, NaF, contain this much fluoride?
A city is considering a reservoir water as its new drinking water source. As a result,...
A city is considering a reservoir water as its new drinking water source. As a result, the city council wants to know how good the reservoir water is to serve this potential purpose. Assume you are the chief engineer of the city utilities; please provide a list of water quality parameters need to be tested and the corresponding testing methods.
A single lake (referred to as the “City Reservoir”) provides all the drinking water for a...
A single lake (referred to as the “City Reservoir”) provides all the drinking water for a city. The city wants to reduce risks to its water supply by adding a second lake as an additional water source. Two lakes are under consideration and only one will be used. The first lake is located next to the current City Reservoir which allows the city to reduce costs by sharing the single original water pipe from the Reservoir to city. The second...
Determine the calcium content (in ppm) of a 100.00 mL sample of drinking water if the...
Determine the calcium content (in ppm) of a 100.00 mL sample of drinking water if the following data were obtained. Titrant is 0.0505 M EDTA, 13.49 mL were used when an aliquot of the sample was at pH 13.0, 16.99 mL were used for an aliquot at pH 10.5.
Determine the calcium content (in ppm) of a 100.00 mL sample of drinking water if the...
Determine the calcium content (in ppm) of a 100.00 mL sample of drinking water if the following data were obtained. Titrant is 0.0421 M EDTA, 13.84 mL were used when an aliquot of the sample was at pH 13.0, 19.36 mL were used for an aliquot at pH 10.5.
In the US, fluoride is added to drinking water. In 2015, the US Department of Health...
In the US, fluoride is added to drinking water. In 2015, the US Department of Health [12] lowered the recommended amount of fluoride in drinking water. Fluoride is added to drinking water to help prevent tooth decay, but too much fluoride can lead to fluorosis (white stains in the enamel of the teeth). A particular city wants to check whether their drinking water meets the specifications made by the department of health. The department of health recommends that there should...
Fluoride, in the form of sodium silicofluoride (Na2SiF6), is commonly added to municipal drinking water to...
Fluoride, in the form of sodium silicofluoride (Na2SiF6), is commonly added to municipal drinking water to prevent tooth decay. It is generally added at a level of 1.0 mg/L, but its maximum concentration level (MCL) cannot exceed 4.0 mg/L. You have been assigned to prepare a liter of a standard solution that contains 1.000 mg/L fluoride. a. Which balance in your lab would you use to prepare the solution? Explain why.
The Environmental Protection Agency has determined that safe drinking water should, on average, contain no more...
The Environmental Protection Agency has determined that safe drinking water should, on average, contain no more than 1.3 mg/liter of copper. You are testing water from a new source, and take 31 water samples. The mean copper content in your samples is 1.46 mg/l and the standard deviation is 0.18 mg/l. (a) Is there convincing evidence at the α = 0.05 significance level that the water from this source contains unsafe levels of copper? (Do a 4-step process) (b) Referring...
According to the "Guidelines for Canadian Drinking Water Quality", although fluoride (F) is beneficial in preventing...
According to the "Guidelines for Canadian Drinking Water Quality", although fluoride (F) is beneficial in preventing tooth decay, its acceptable concentration in drinking water is limited to 1.5mg/L. Find the maximum amount of sodium fluoride (NaF) in the kg that can be added to 3 MG water with no fluoride. ( MG= million gallons; mg=milligrams).
1 a) What health benefit is derived by adding fluoride to toothpaste or drinking water? What...
1 a) What health benefit is derived by adding fluoride to toothpaste or drinking water? What are the possible hazards? b) What is the present recommended concentration of fluoride in Toronto’s tap water and over the counter toothpaste?
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT