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3 years ago

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

Chemistry

1 answer:

blsea [12.9K]3 years ago

6 0

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

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