Question

Adiponitrile is produced by the reaction of HCN and butadiene:

If 450 kg of butadiene and 400 kg of HCN were to react to completion, what is the maximum amount of adiponitrile that would be produced?

Answer 1

801kg of adiponitrile would be produced

Step-by-step explanation:

The reaction of HCN and butadiene is:

2HCN + Butadiene → Adiponitrile.

Where 2 moles of HCN reacts per mole of butadiene to produce 1 mole of adiponitrile

The maximum amount of adiponitrile produced depends of the limiting reactant. To find limiting reactant we need to find moles of butadiene and HCN that react:

Moles butadiene - Molar mass: 54g/mol-:

450kg = 450000g * (1mol / 54g) = 8333 moles of butadiene

Moles HCN -Molar mass: 27g/mol-:

400kg = 400000g * (1mol / 27g) = 14815 moles HCN

Based on the chemical equation, for a complete reaction of 14815 moles of HCN are required:

14815 moles HCN * (1mol butadiene / 2 moles HCN) = 7407 moles of butadiente are required.

As there are 8333 moles of butadiene, HCN is limiting reactant.

And maximum moles of adiponitrile that can be obtained are:

14815 moles HCN * (1mol adiponitrile / 2 moles HCN) =

7407 moles of adiponitrile is the maximum amount that can be obtained

In grams -Molar mass: 108.14g/mol-:

7407 moles Adiponitrile * (108.14g/mol) = 801037g of adiponitrile:

801kg of adiponitrile would be produced