Question

Thiophenedithiolate is a compound that contains C, H, and S. It is used to trap transition metal ions such as copper, cobalt, and platinum. A 1.086 g sample of thiophenedithiolate is subjected to combustion analysis, and produces 2.272 g CO2 and 0.465 g of H2O.

a) Based on the masses of CO2 and H2O, calculate the masses of C and H;

Answer 1

Calculation of mass of C

molar mass of CO₂ = 44gm/mole and molar mass of C =12gm/mole

that mean in 44 gm of CO₂ contain 12 gm of carbon.then 2.272 gm CO₂ contain

2.27212/44 = 0.6196 gm of carbon

2.272 gm of CO₂ contain 0.696 gm of carbon

Calculation of mass of H

molar mass of H₂O = 18gm/mole and molar mass of H₂ = 2gm/mole

that mean 18 gm H₂O contain 2 gm H₂ then 0.465 gm  H₂O contain

0.4652/18 = 0.05166 gm hydrogen

0.465 gm H₂O contain 0.05166 gm of hydrogen