2С2H5OH + 2Na --> 2C2H5ONa + H2
2C6H5OH + 2Na --> 2C6H5ONa + H2
C6H5OH + KOH --> C6H5OK + H2O
m(KOH)p-p = pV = 1.4 * 25 = 35г
m(KOH) = m(p-p) *w = 32 * 0.4 = 12.8 г
n(KOH) = m/M = 12.8/56 =0.2 моль
n(C6H5OH) = n(KOH) = 0.2 моль
m(C6H5OH) = M*n = 94 * 0.2 =18.8 г
n1(H2)= 1/2n(C6H5OH)= 0.1 моль
V1(H2) = Vm * n =22.4 * 0.1 = 2.24 л
V2(H2) = V-V1 = 6.72 - 2.24 = 4.48 л
n2(H2) = V2/Vm = 4.48/22.4 = 0.2 моль
n(C2H5OH) = 2n2(H2) = 0.4моль
m(C2H5OH) = M*n = 46 * 0.4 = 18.4 г
w(C2H5OH) = m(C2H5OH)/m(C2H5OH)+m(C6H5OH) *100% =18.4/18.4+18.8 *100% = 49.46%
w(C6H5OH) = 100% - w(C2H5OH) = 100 % - 49.46% = 50.54%