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Chapter 22: Q22.30P (page 1018)
How is Le Ch芒telier's principle involved in the production of elemental potassium?
The potassium formed as the product is removed. According to Le Chatelier's principle, as the gaseous metal leaves the cell, the system shifts towards forming more K.
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The use of silica to form slag in the production of phosphorus from phosphate rock was introduced by Robert Boyle more than years ago. When fluorapatite is used in phosphorus production, most of the fluorine atoms appear in the slag, but some end up in toxic and corrosive .
(a) If by mass of the fluorine in of forms , what volume of this gas is collected at and the industrial furnace temperature of ?
(b) In some facilities, the is used to produce sodium hexafluoro silicate which is sold for water fluoridation:
How many cubic meters of drinking water can be fluoridated to a level of
of
using the
produced in part (a)?
The location of elements in the regions of Earth has enormous practical importance.
(a) Define the term differentiation, and explain which physical property of a substance is primarily responsible for this process.
(b) What are the four most abundant elements in the crust?
(c) Which element is abundant in the crust and mantle but not the core?
Heavy water is used to make deuterated chemicals.
(a) What major species, aside from the starting compounds, do you expect to find in a solution of and ?
(b) Write equations to explain how these various species arise. (Hint: Consider the autoionization of both components.)
What factors determine which reducing agent is selected for producing a specific metal?
Question: Earth鈥檚 mass is estimated to be , and titanium represents by mass of this total. (a) How many moles of are present? (b) If half of the is found as ilmenite , what mass of ilmenite is present? (c) If the airline and auto industries use tons of per year, how many years would it take to use up all the?
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