theo đề bài:
nAgCl=86,1/143,5=0,6mol
PTPU:
MgCl2+2NaOH->Mg(OH)2+2NaCl
x.................2x..............x..........2x(mol)
CuCl2+2NaOH->Cu(OH)2+2NaCl
y...............2y............y...............2y(mol)
Mg(OH)2->MgO+H2O
x...................x...........x(mol)
Cu(OH)2->CuO+H2O
y..................y.............y(mol)
mMgO+mCuO=mhh
40x+80x=16(1)
mặt khác:
MgCl2+2AgNO3->Mg(NO3)2+2AgCl
x...............2x...............x.................2x(mol)
CuCl2+2AgNO3->Cu(NO3)2+2AgCl
y................2y................y...............2y(mol)
nAgCl=2x+2y=0,6(2)
từ (1) và(2)=>x=0,2;y=0,1
nMgCl2=0,2mol
CMMgCl2=0,2/0,5=0,4M
nCuCl2=0,1mol
CMCuCl2=0,1/0,5=0,2M