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Câu hỏi: Cho dãy các chất: phenyl axetat, metyl axetat, etyl fomat, tripanmitin. Số chất trong dãy khi thủy phân trong dung dịch $\mathrm{NaOH}$ (dư), đun nóng sinh ra ancol là:
A. 4.
B. 5.
C. 2.
D. 3.
A. 4.
B. 5.
C. 2.
D. 3.
Các chất thủy phân trong dung dịch $\mathrm{NaOH}$ (dư), đun nóng sinh ra ancol: metyl axetat, etyl fomat, tripanmitin.
PTHH:
$\mathrm{CH}_{3} \mathrm{COOCH}_{3}+\mathrm{NaOH} \rightarrow \mathrm{CH}_{3} \mathrm{COONa}+\mathrm{CH}_{3} \mathrm{OH}$
$\mathrm{HCOOCH}_{2} \mathrm{CH}_{3}+\mathrm{NaOH} \rightarrow \mathrm{HCOONa}+\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}$
$\left(\mathrm{C}_{15} \mathrm{H}_{31} \mathrm{COO}\right)_{3} \mathrm{C}_{3} \mathrm{H}_{5}+3 \mathrm{NaOH} \rightarrow 3 \mathrm{C}_{15} \mathrm{H}_{31} \mathrm{COONa}+\mathrm{C}_{3} \mathrm{H}_{5}(\mathrm{OH})_{3}$
PTHH:
$\mathrm{CH}_{3} \mathrm{COOCH}_{3}+\mathrm{NaOH} \rightarrow \mathrm{CH}_{3} \mathrm{COONa}+\mathrm{CH}_{3} \mathrm{OH}$
$\mathrm{HCOOCH}_{2} \mathrm{CH}_{3}+\mathrm{NaOH} \rightarrow \mathrm{HCOONa}+\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}$
$\left(\mathrm{C}_{15} \mathrm{H}_{31} \mathrm{COO}\right)_{3} \mathrm{C}_{3} \mathrm{H}_{5}+3 \mathrm{NaOH} \rightarrow 3 \mathrm{C}_{15} \mathrm{H}_{31} \mathrm{COONa}+\mathrm{C}_{3} \mathrm{H}_{5}(\mathrm{OH})_{3}$
Đáp án D.