1)ch3-coh+2[ag(nh3)2]oh=ch3-coonh4+2ag+3nh3+h2o
1 2
n(ch3-coh)=11/440,25моль; n(ag)=0,25*2=0,5моль; m(ag)=0,5*108=27г;
2)c2h5oh+cuo=ch3-coh+cu+h2o
1 1
n(c2h5oh)=92/46=2моль; n(ch3-coh)=2моль; m(ch3-coh)=2*44*0,8=70,4г.
Mn2+ -5e- = Mn+7 | 5 | 10 | 2 |
Pb+4 +2e- = Pb2+ | 2 | | 5 |;
M экв. Mn(NO3)2 = 179*(1/5) = 35.8 г/моль;
M экв. PbO2 = 239.2*(1/2) = 119.6 г/моль.