Предмет: Химия, автор: dashakrsk2016

Вычислите массу 20 процентного раствора гидроксида натрия необходимого для реакции 4.48 л углекислого газа с образованием средней соли.​ Решите пожалуйста через пропорцию, очень нужно

Ответы

Автор ответа: vladteslitsky
0

Дано:

w(NaOH) = 20%=0.2

v(CO2) =4.48л

Решение:

NaOH + CO2 = NaCO3 + H2O

n= v/vm

n(CO2) =4.48л/22.4л = 0.2 моль

1 моль(CO2) = 1 моль(NaOH)

0.2 моль(CO2) = 0.2 моль(NaOH)

m = n * M

m(NaOH) = 0.2моль * 40г/моль = 8г

m(в-ва) = w * m(р-ра)

m(NaOH) = 0.2 * 8г ≈ 1.6г


dashakrsk2016: Уравнение не правильное
vladteslitsky: ну мы так решали
dashakrsk2016: NaOH + CO2 = Na2CO3 + H2O так должно быть ну и + коэффициенты
vladteslitsky: ааа понятно
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