3NaOH + FeCl3 = 3NaCl + Fe(OH)3↓
m(NaOH)чист = 200*0,4= 80 г
ν (NaOH) = m\M = 80\40 = 2 моль
ν (Fe(OH)3) = 3* ν (NaOH) = 3*2 = 6 моль
m (Fe(OH)3) = ν*M = 6*107 = 642 г
3NaOH + FeCl3 = 3NaCl + Fe(OH)3↓
m(NaOH)чист = 200*0,4= 80 г
ν (NaOH) = m\M = 80\40 = 2 моль
ν (Fe(OH)3) = 3* ν (NaOH) = 3*2 = 6 моль
m (Fe(OH)3) = ν*M = 6*107 = 642 г