Xà phòng hoá hoàn toàn 17,24 gam chất béo

    17,24  (g)              

 (RCOO)₃C₃H₅    +     3NaOH    →     3RCOONa  +   C₃H₅(OH)₃

                                 0,06  →                                 0,02   (mol)

BTKL:

\(\begin{array}{l} {m_{RCOONa}} = {m_{{{(RCOO)}_3}{C_3}{H_5}}} + {m_{NaOH}} - {m_{{C_3}{H_5}{{(OH)}_3}}}\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = \,\,\,17,24\,\,\, + \,\,\,\,0,06.40\,\, - \,\,\,0,02.92\\ \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = \,\,\,17,8\,\,\,(g) \end{array}\)