Question

For the reaction C+2H 2 —->CH 4 calculate the percent yield if 98 g of methane is produced when 100. g of carbon reacts with an excess of hydrogen?

Answer 1

The percent yield : 73.5%

Further explanation

Given

Reaction

C+2H₂⇒CH₄

Required

The percent yield

Solution

mol of Carbon(as a limiting reactant) :

`\tt (100)/(12)=8.3`

mol CH₄ based on C, and from equation mol ratio C : CH₄, so mol CH₄ = 8.3

Mass of Methane(theoretical yield) :

`\tt mass=mol* MW\\\\mass=8.3* 16=133.3~g`

`\tt \%~yield=(actual)/(theoretical)* 100\%\\\\\%yield=(98)/(133.3)* 100\%=73.5\%`