What mass of acetylene gas, C2H2, would be produced by complete reaction of 3.75g of calcium carbide

The mass of C₂H₂ that would be produced by complete reaction of 3.75 g of calcium carbide is 1.524 grams

calculation

calcium carbide (CaC₂) react with water (H₂O) to produce C₂H₂ and Ca (OH) ₂ according to reaction below

CaC₂ + 2H₂O C₂H₂ + Ca (OH) ₂

calculate the moles of CaC₂

moles = mass: molar mass

from periodic table the molar mass of CaC₂ = 40 + (12 x2) = 64 g/mol

moles is therefore = 3.75 g: 64 g/mol = 0.0586 moles

Use the mole ratio to determine the moles of C₂H₂

from equation above CaC₂: C₂H₂ is 1:1 therefore the moles of C₂H₂ is also

= 0.0586 moles

mass of C₂H₂ = moles x molar mass

from periodic table the molar mass of C₂H₂ = (12 x 2) + (1 x 2) = 26 g/mol

mass = 0.0586 moles x 26 g/mol = 1.524 grams