CaC2 + 2H2O = Ca(OH)2 + C2H2
n(C2H2) = V(C2H2)/Vm = 28/22,4 = 1,25(моль)
по уравнению реакции n(CaC2) = n(C2H2) = 1,25(моль)
m(CaC2) = n(CaC2)*M(CaC2) = 1,25*64 = 80(г)
w(CaC2) = 100% - w(прим) = 100% - 20% = 80%
w(CaC2) = (m(CaC2)/mтехн(CaC2))*100%
mтехн(CaC2) = m(CaC2)*100%/w(CaC2) = 80*100%/80% = 100(г)
Ответ: mтехн(CaC2) = 100 г
CaC2 + 2H2O = Ca(OH)2 + C2H2
n(C2H2) = V(C2H2)/Vm = 28/22,4 = 1,25(моль)
по уравнению реакции n(CaC2) = n(C2H2) = 1,25(моль)
m(CaC2) = n(CaC2)*M(CaC2) = 1,25*64 = 80(г)
w(CaC2) = 100% - w(прим) = 100% - 20% = 80%
w(CaC2) = (m(CaC2)/mтехн(CaC2))*100%
mтехн(CaC2) = m(CaC2)*100%/w(CaC2) = 80*100%/80% = 100(г)
Ответ: mтехн(CaC2) = 100 г