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Question

A vessel contains 8 g of TiO2, 2.4 g of carbon and 28.4 g of Cl2 gas. Find the maximum mass of TiCl4 which can be produced.
3TiO2(s)+4C(s)+6Cl2(g)3TiCl4(g)+2CO2(g)+2CO(g)

(Consider the reaction to go to completion; atomic mass of Ti=48 u, C=12 u, O=16 u, Cl=35.5 u)

A
1.9 g
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B
28 g
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C
19 g
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D
3.8 g
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Solution

The correct option is C 19 g
The balanced chemical equation for above mentioned reaction is:
3TiO2(s)+4C(s)+6Cl2(g)3TiCl4(g)+2CO2(g)+2CO(g)
Number of moles of TiO2:880=0.1 mol TiO2
Number of moles of Carbon =2.412=0.2 mol C
Number of moles of Chlorine =28.471=0.4 mol Cl2
To find limiting reagent, we calculate Given molesStoichiometric coefficient
For TiO2=0.13=0.033
For Carbon =0.24=0.05
For Chlorine =0.46=0.06
Since, the value for TiO2 is minimum, it will be the limiting reagent.
As per stoichiometry,
3 moles of TiO2 reacts with 4 moles of C and 6 moles of Cl2 to give 3 moles of TiCl4.
0.1 mol of TiO2 will produce 0.1 mol of TiCl4
Mass of TiCl4 produced = 0.1 mol × molar mass = 0.1 mol × 190 g/mol
Mass of TiCl4 produced = 19 g of TiCl4

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