Предмет: Химия, автор: ulyana2000kot14

Обчисліть масу етанолу яку можна добути з 200кг картоплі що містить 30% крохмаль.

Ответы

Автор ответа: cherevaty
19
60 000г                                            х г
(C_6H_{10}O_5)_n+nH_2O=2nC_2H_5OH+2nCO_2
162 г                                                92 г
1. Визначимо масу крохмалю у картоплі,перемноживши масу картоплі на масову частку крохмалю у ній(позбавившись попередньо від відсотків і поділивши масову частку на 100):
m(крохмалю)=200*0,3=60 кг або 60 000 г
2. Підставивши цю масу у рівняння,отримаємо:
з 162 г крохмалю утворюється  92 г спирту, а
з 60 000 г___________________х г, звідки
х=92*60 000/162=34074 г або приблизно 34 кг
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