Answer to Question #262722 in General Chemistry for mav

Question

The ozone hole in the Antarctic is growing. Chlorofluorocarbons CFC produced by humans and used as coolants in the air conditioners and refrigerators, have been pointed at as the culprits. One such CFC compound is dichlorodifluoromethane or freon-12. a reaction involved in the production of Freon-12 is as follows.

CCl4 + SbF3 CCl2F2 + SbCl2F

Determine the mass in grams of CCl4 required to completely react with 25.75 g of SbF3.

From the mass of CCl4 which is limiting reactant?

Which reactant is present in excess?

What is the mass of SbCl2F produced?

What mass of the reactant in excess remains unreacted?

 

Answer 1

2SbF₃ (aq) + 3CCl₄ (l) → 3CCl₂F₂ (g) + 2SbCl₃ (aq)

Moles of $SbF_3$ $=\frac{ 25.75}{178.75}=0.144moles$

Moles of $CCl_4=\frac{3}{2}×0.144=0.216moles$

Mass of $CCl_4= 153.82 ×0.216=33.23grams$

$SbF_3$ Is the limiting reactant