a kmoli 2,2 kg
CH3CH2OH + [O] => CH3CH=O + H2O /x3
3 3x44
n kmoli a kmoli
K2Cr2O7 + 4H2SO4 => K2SO4 + Cr2(SO4)3 + 4H2O + 3[O]
1 3
=> n/1 = 2,2/44x3
=> n = 0,01667 kmoli sol. K2Cr2O7 la randamant de 75%
la 100% , avem
0,01667x100/75 = 0,0222 Kmoli = 22,2 moli
Cm = 1/9 = 0,111 M = niu / Vs = n / Vs
=> Vs = n/Cm = 22,2/0,111 = 200 L