Solved: Titanium dioxide, the most widely used white

Chapter 19, Problem 19.14

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Titanium dioxide, the most widely used white pigment, occurs naturally but is often colored by the presence of impurities. The chloride process is often used in purifying rutile, a mineral form of titanium dioxide. a. Show that the unit cell for rutile, illustrated below, conforms to the formula TiO2. (Hint: Recall the discussion in Section 16.4.) O Ti b. The reactions for the chloride process are 2TiO2(s) 1 3C(s) 1 4Cl2(g) 8888n 2TiCl4(g) 1 CO2(g) 1 2CO(g) TiCl4(g) 1 O2(g) 888888888n TiO2(s) 1 2Cl2(g) Assign oxidation states to the elements in both reactions. Which elements are being reduced, and which are being oxidized? Identify the oxidizing agent and the reducing agent in each reaction

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