a) nBa(OH)2= (200.17,1%)/171=0,2(mol)
nCuSO4=(500.8%)/160=0,25(mol)
PTHH: CuSO4 + Ba(OH)2 -> BaSO4 + Cu(OH)2
+ Kt A có Cu(OH)2 và BaSO4.
+ dd B có dd CuSO4 dư (Vì 0,25/1 > 0,2/1 =>dd CuSO4 dư)
a) mA=mCu(OH)2+ mBaSO4=0,2.98+0,2.233= 66,2(g)
b) mddB= mddBa(OH)2+ mddCuSO4 - mktA= 200+500- 66,2= 633,8(g)
mCuSO4(dư)=(0,25-0,2).160=8(g)
=>C%ddCuSO4(dư)=(8/633,8).100=1,262%