Предмет: Химия, автор: pifojohi123

Сколько граммов муравьинно-этилового эфира выделится при взаимодействии 90г 20% муравьиной кислоты и 40г 40% этилового спирта?

Ответ желательно прислать на листочке или рисунком в paint'e.

Ответы

Автор ответа: mrvladimir2
0
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Приложения:
Автор ответа: Alexei78
0
дано
m(ppa CHOOH)=90 g
W(CHOOH)=20%
m(ppaC2H5OH)=40 g
W(C2H5OH)=40%
----------------------
m(CHOOC2H5)-?

m(CHOOH)= 90*20%/100% = 18 g
M(CHOOH)=46 g/mol
n(CHOOH) = m/M=18/46=0.39 mol
m(C2H5OH)=40*40%/100% = 16 g
M(C2H5OH)=46 g/mol
n(C2H5OH)=m/M=16/46=0.35 mol
n(CHOOH)>n(C2H5OH)

CHOOH+C2H5OH-->CHOOC2H5+H2O M(CHOOC2H5)=74 g/mol
n(C2H5OH)=n(CHOOC2H5)= 0.35 mol
m(CHOOC2H5)= n*M = 0.35*74=25.9 g
ответ 25.9 г

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