nK2Cr2O7=nantracen
Cm=n/Vs==>Vs=n/Cm=2/0.2=10 L sol. K2Cr2O7
Reactioneaza 2 moli, deci tot 2 moli de atrachinona se regasesc.
MC14H8O2=208g/mol
n=m/M==>m=n*M=2*208=416g C14H8O2
n(eta=randament)=masa practica /masa teoretica*100==>mp=n*mt/100=70*416/100=219.2 g atrachinona
0.7*416=291.2 g C14H8O2
Asta e formula:
[tex]n(eta) = mpractic/mteoretic*100[/tex]