Acetylene,C₂H₂,burns according to the following reaction: C₂H₂+5O₂$\rarr$ 4CO₂+2H₂O.Suppose 1.20 g of C₂H₂ is mixed with 3.50 g of O₂ in a closed,steel container,and the mixture is ignited.What substances will be found in the mixture left when the burning is complete?

Question

Quizplus · Accepted Answer

1.20 g of C₂H₂ is 0.025 mol, and 3.50 g of O₂ is 0.11 mol. The stoichiometry of the reaction shows that 0.025 mol of C₂H₂ requires 0.125 mol of O₂, so O₂ is the limiting reactant. When the O₂ is consumed, the reaction will stop, and there will be 0.025 mol of CO₂ and 0.01 mol of H₂O produced. The unreacted C₂H₂ will be 0.025 mol - 0.025 mol = 0 mol. Therefore, the substances left in the mixture will be CO₂ and H₂O.

Acetylene,C2H2,burns According to the Following Reaction: C2H2+5O2 →\rarr→ 4CO2+2H2O

Acetylene,C₂H₂,burns According to the Following Reaction: C₂H₂+5O₂ $\rarr$ 4CO₂+2H₂O