Предмет: Химия, автор: kedyshzhenya

В кастрюлю налили полстакана (100 г) 6,0 %-ного уксуса и всыпали чайную ложку (8,4 г) питьевой соды. Полученный раствор прокипятили, охладили и добавили к нему несколько капель свекольного сока. Какого цвета оказался полученный раствор?

Ответы

Автор ответа: prevedd91

CH3-COOH + Na[HCO3] = CH3-COO-Na + H2O + CO2↑
m(уксуса)=mp-pa*ω=100*0.06=6г
n(уксуса)=m/M=6/60=0.1 моль
n(соды)=m/M=8.4/84=0.1 моль
кол-во в-ва одинаковое, считаем по любому
m(CH3COONa)=n*M=0.1*82=8.2г

в свекольном соке содержится много железа, по этому возможно выпадает красно-бурый осадок

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