A. Titanium, which is used to make airplane engines and frames, can be obtained

Question

A. Titanium, which is used to make airplane engines and frames, can be obtained from titanium tetracholoride, which in turn is obtained from titanium dioxide by the following process: 3Ti02 (s)+ 4C (s) 6C12(g) 3TiCl, (g) 2C02 (g) 2C0 (g) A vessel contains 4.15g TiO2, 5.67 g c, and 6.78 g Cl,. Suppose the reaction goes to completion as written. How many grams of titanium tetrachloride can be produced. 5. How many grams of sodium dichromate, Na,Cr,o,, should be added to a 50.0-mL volumetric flask to prepare 0.025 M Na,Cr,o, when the flask is filled to the mark with water? What are the Molarities of the Na' ion and the cr2072- ion in the solution? 6. How many milliliters of 0.238 M KMno, are needed to react with 3.36 g of iron (II) sulfate, Feso,? The reaction is as follows: 10Feso, (aq)+2KMno,(aq)+8H,SO,(aq) > 5Fe, (SO,)(ag) + 2MnsO, (aq) +K,SO (aq) +8H,0 (1) 7. A 1.28-g sample of a colorless liquid was vaporized in 250-mt, flask at a 121°C and 786 mmHg. what is the molecular weight of this substance? Smal1 amounts of hydrogen are conveniently prepared by reacting zinc with hydrochloric acid. 8. Zn (s) 2HC1 (aq)>Zncl, (aq) + H (g) How many grams of zinc are required to prepare 2.50 L H2 gas at 765 mmHg and 22°C? 9. The atmosphere in a sealed diving bell contained oxygen and

Explanation / Answer

mol of TiO2 = mass/MW = 4.15/79.8658 = 0.05196

mol of C = mass/MW = 5.67/12 = 0.4725

mol of Cl2 = mass/MW = 6.78/70.9 = 0.0956

clearly, Cl2 is limiting so

6 mol of Cl2 = 3 mol of TiCl4

0.0956 mol of Cl2 --> produces 3/6*0.0956 = 0.0478 mol of TiCl4

mass = mol*MW = 0.0478*189.679 = 9.066 g of TiCl4 produced

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