Question

Calculate theoretical yield, actual yield and percent yield.

Data:
mass recovered: 12.1188 g.

2-methylcyclohexanol
MM: 114.2 g/mol
D: 0.930 g/mL
BP: 166 C

1-methylcyclohexene
MM: 96.2 g/mol
D:0.813 g/mL
BP: 110 C

Answer 1

AnsweA stoichiometrically Balanced chemical equation :

Molar equivalence says,

1 mole of 1-Methylcyclohexene 1 mole of 2-methylcyclohexanol.

I.e 96.2 g of 1-Methylcyclohexene 114.2 g of 2-methylcyclohexanol.

Mass of 2-methylcyclohexanol recovered is given as 12.1188 g.

Hence on assuming 100 % yield let us calculate actual expected mass of 1-Methylcylclohexene used.

We write,

If, 96.2 g of 1-Methylcyclohexene 114.2 g of 2-methylcyclohexanol.

then say ' A' g of 1-Methylcyclohexene 12.1188 g of 2-methylcyclohexanol.

On cross multiplication we get,

A x 114.2 = 96.2 x 12.1188

A = 96.2 x 12.1188 / 114.2

A = 10.2087 g

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Note:

% Yield = ( Experimental yield / Theoretical Yield ) x 100.

On knowing the mass of reactant one can calculate expected ii.e. theoretical yield and then % yield.