\(\text{a. Ba+2HCl}\rightarrow\text{BaCL2+H2}\)
\(\text{Ba+2H2O}\rightarrow\text{Ba(OH)2+H2}\)
\(\text{ CuSO4+Ba(OH)2}\rightarrow\text{Cu(OH)2+BaSO4}\)
\(\text{ Cu(OH)2}\rightarrow\text{CuO+H2O}\)
PTHH:\(\text{b. Ba+2HCl}\rightarrow\text{BaCL2+H2}\)
trước____0,1___0,12
phản ứng 0,06__0,12
dư______0,04__0_____0,06
\(\text{Ba+2H2O}\rightarrow\text{Ba(OH)2+H2}\)
0,06_________0,06
PTHH:\(\text{ CuSO4+Ba(OH)2}\rightarrow\text{Cu(OH)2+BaSO4}\)
Trước___0,1______0,06
Phản ứng__0,06___0,06______0,06________0,06
Dư_____0,04____0_________0,06________0,06
\(\text{Cu(OH)2}\rightarrow\text{CuO+H2O}\)
\(\rightarrow\text{m=mBaSO4+mCuO=0,1.233+0,06.80=28,1}\)