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Sveta1969
@Sveta1969
July 2022
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Помогите решить задачу срочно!!!!
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trserg
Verified answer
х г y г 2,24л
Na2CO3 + 2HCl = 2NaCl + H2O+CO2
1 моль моль 1 моль
n(CO2) = 2..24/22.4 = 0.1моль
n(NaCl) = 1/2 n(CO2) = 0,05 моль
m (NaCl) = 0.05 * 58.5 = 2.925г
n(Na2CO3) = n (CO2) = 0.1моль
m (Na2CO3) = 0.1 * 106 = 10.6г
каустическая сода
NaOH + HCl = NaCl + H2O
m(NaCl) = 234 - 2.95 = 231.05г
n(NaCl) = 231.05 / 58.5 = 3.95 моль
n(NaOH) = n(NaCl) = 3,95 моль
m(NaOH) = 3,95 * 40 = 158г
w(Na2CO3) = 10.6 / (10.6 + 158) = 0.0629 или 6,29%
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Sveta1969
спасибо
Sveta1969
а можете помочь решить еще одну задачу
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Sveta1969
https://znanija.com/task/25480381
trserg
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Answers & Comments
Verified answer
х г y г 2,24лNa2CO3 + 2HCl = 2NaCl + H2O+CO2
1 моль моль 1 моль
n(CO2) = 2..24/22.4 = 0.1моль
n(NaCl) = 1/2 n(CO2) = 0,05 моль
m (NaCl) = 0.05 * 58.5 = 2.925г
n(Na2CO3) = n (CO2) = 0.1моль
m (Na2CO3) = 0.1 * 106 = 10.6г
каустическая сода
NaOH + HCl = NaCl + H2O
m(NaCl) = 234 - 2.95 = 231.05г
n(NaCl) = 231.05 / 58.5 = 3.95 моль
n(NaOH) = n(NaCl) = 3,95 моль
m(NaOH) = 3,95 * 40 = 158г
w(Na2CO3) = 10.6 / (10.6 + 158) = 0.0629 или 6,29%