Ta có: \(n_{Ba}=\dfrac{1,37}{137}=0,01\left(mol\right)\)
\(n_{CuSO_4}=0,01.1=0,01\left(mol\right)\)
PT: \(Ba+2H_2O\rightarrow Ba\left(OH\right)_2+H_2\)
____0,01______________0,01 (mol)
\(Ba\left(OH\right)_2+CuSO_4\rightarrow Cu\left(OH\right)_{2\downarrow}+BaSO_{4\downarrow}\)
0,01__________0,01_________0,01______0,01 (mol)
→ Pư vừa đủ.
⇒ m↓ = mCu(OH)2 + mBaSO4 = 0,01.98 + 0,01.233 = 3,31 (g)