Question

Acetylene gas, C₂H₂(g), can be prepared by the reaction of calcium carbide with water: CaC₂(s) + 2H₂O(l) → Ca(OH)2(s) + C₂H₂(g). Calculate the volume of C₂H₂ that is collected over water at 23°C by the reaction of 1.524 g of CaC₂ if the total pressure of the gas is 753 torr. The vapor pressure of water at 23°C is 21.07 torr.

Answer 1

To calculate the volume of C₂H₂ collected over water at 23°C by the reaction of 1.524 g of CaC₂, use the ideal gas law.

Step-by-step explanation:

To calculate the volume of C2H2 collected over water at 23°C by the reaction of 1.524 g of CaC2, we need to use the ideal gas law. First, convert the mass of CaC2 to moles by dividing it by the molar mass of CaC2. Then, use the stoichiometry of the reaction to determine the number of moles of C2H2 produced. Next, calculate the partial pressure of C2H2 by subtracting the vapor pressure of water from the total pressure. Finally, use the ideal gas law to calculate the volume of C2H2.