Hỗn hợp E gồm axit panmitic, axit stearic và trigl...

D

- Hướng dẫn giải

\(\begin{array}{l}
{\rm{m(g)}}\left\{ \begin{array}{l}
\left. \begin{array}{l}
{C_{17}}{H_{35}}COOH\\
{C_{15}}{H_{31}}COOH
\end{array} \right\}{\rm{ x (mol)}}\\
Triglixerit{\rm{ no: y (mol)}}
\end{array} \right. \to 57,84{\rm{ (g)}}\left\{ \begin{array}{l}
{C_{17}}{H_{35}}COONa:{\rm{ a (mol)}}\\
{C_{15}}{H_{31}}COONa:{\rm{ b (mol)}}
\end{array} \right.\\
 \to \left\{ \begin{array}{l}
3,48{\rm{ (mol) C}}{{\rm{O}}_2}\\
z{\rm{ (mol) }}{{\rm{H}}_2}O
\end{array} \right.\\
 \to \left\{ \begin{array}{l}
3,48 - z = 2y\\
2x + 6y - z =  - 3\\
3,48.12 + 2z + 32x + 96y + 40(x + 3y) = 57,84 + 18x + 92y
\end{array} \right. \to \left\{ \begin{array}{l}
x = 0,08\\
y = 0,04\\
z = 3,4
\end{array} \right.\\
 \to \left\{ \begin{array}{l}
306a + 278b = 57,84\\
a + b = 0,2
\end{array} \right. \to \left\{ \begin{array}{l}
a{\rm{  =  0,08}}\\
{\rm{b  =  0,12}}
\end{array} \right. \to {\rm{ }}\left. \begin{array}{l}
{C_{17}}{H_{35}}COO - C{H_2}\\
{\rm{                       |}}\\
{C_{15}}{H_{31}}COO - CH\\
{\rm{                       |}}\\
{C_{15}}{H_{31}}COO - C{H_2}
\end{array} \right\} \to {{\rm{m}}_X}{\rm{ =  0,04}}{\rm{.834  =  33,36 (g)}}
\end{array}\)