The use of silica to form slag in the production of
Chapter 22, Problem 22.17(choose chapter or problem)
The use of silica to form slag in the production of phosphorus from phosphate rock was introduced by Robert Boyle more than 300 years ago. When fluorapatite [Ca5(PO4)3F] is used in phosphorus production, most of the fluorine atoms appear in the slag, but some end up in toxic and corrosive SiF4(g). (a) If 15% by mass of the fluorine in 100. kg of Ca5(PO4)3F forms SiF4, what volume of this gas is collected at 1.00 atm and the industrial furnace temperature of 1450.?C? (b) In some facilities, the SiF4 is used to produce sodium hexa- fluorosilicate (Na2SiF6) which is sold for water fluoridation: How many cubic meters of drinking water can be fluoridated to a level of 1.0 ppm of F? using the SiF4 produced in part (a)?
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