Answer to Question #95999 in General Chemistry for Desha

Question

B) Hexamethylenediamine (C6H16N2) is one of the starting materials to produce nylon. It can be prepared from adipic acid (C6H10O4) according to the following balanced reaction:

a) What mass of hexamethylenediamine can be produced from 495.5 g of adipic acid?
b) What mass of ammonia is necessary to complete the reaction?
c) If the actual yield of hexamethylenediamine is 301.0 g, determine the % yield for the reaction.

Answer 1

C₆H₁₀O₄ + 2NH₃ + 2H₂ → C₆H₁₂N₂ + 4H₂O

M(C₆H₁₀O₄) = 116.2 g/mol

M(C₆H₁₂N₂) = 146.1 g/mol

M(NH₃) = 17.0 g/mol

m(C₆H₁₀O₄) = 495.5 g

m_pract(C₆H₁₂N₂) = 301.0 g

a)     m(C₆H₁₂N₂)=m(C₆H₁₀O₄)*M(C₆H₁₂N₂)/M(C₆H₁₀O₄)=495.5g*146.1g/mol / 116.2g/mol=623.0g

b)   m(NH₃)=m(C₆H₁₀O₄)*2*M(NH₃)/M(C₆H₁₀O₄)=495.5g*2*17.0g/mol / 116.2g/mol=145.0g

c)    𝜂(C₆H₁₂N₂)=m_pract/m_theor*100%=301.0g/623.0g*100%=48.3%