Question

12. Acetylene can be made by allowing calcium carbide to react with water. CaC2 (s) + 2 H20 (1) ► C2H2(g) + Ca(OH)2 (5) What is the theoretical yield of acetylene (C2H2) if 6.132 g of calcium carbide (CaC2) is allowed to react with 2.455 g of water? a) 2.072 g C2H2 b) 1.774 g C2H2 c) 3.325 g C2H2 d) 1.691 g C2H2 13. If you isolate the acetylene gas in a 1.000 L flask at 298.3 K and find that the pressure is 0.888 atm, what is the percent yield of the gas? a) 81.1% C2H2 b) 63.7% C2H2 c) 77.8% C2H2 d) 53.2 % C2H2

Answer 1

Answer. Caca + 2H2O GH₂ + Ca(OH)2 6.132 g دك۲۰۱ 2.455g Molan 64.10239/mes 18. 0152 g mol ne 53 Initial moles of Cech 6.132 64. 1023 gimo = 0.0956595 a mol Initial moles of 40 2.455 y = 0.13627381 mol 18.0152.3.imos Cala need 2 mol H2O 6.09565459 mol Cale will require 2x 0.09 56sq5 anos 0.19131 Gig mo but He D available evily 0.13627381 mo! is limiting mean ho reactarte. from balanced reaction stoichiometry moles of cha Pooduced (ا را به ارر reached PH moles of all produced +0.15627381 1201 0.06814 10.01

0.0681UY0017 26-0381800! Mass of CH2 produced 0.0 68lumoly Molar mass of Griz 1.774 دربار اور مہریہ 1 رو 1.794 & an using ideal gas equation for alle PV = nRT na py = put = 0.888 afmx 1.0002 0.08206 com. 1x 298.3K molk n= 0.036276735 mol percent yield - actucel moles theoretical moles X 100 0.036276735 mol 0.068 Iu mol X 100 - 53. 24 y. @ 53.2 % C2H2/