Ta có: \(n_{Na}=0,1\left(mol\right)\)
\(n_{Cu^{2+}}=n_{CuSO_4}=0,075\left(mol\right)\)
BTNT Na, có: \(n_{NaOH}=n_{Na}=0,1\left(mol\right)\) \(\Rightarrow n_{OH^-}=0,1\left(mol\right)\)
PT: \(Cu^{2+}+2OH^-\rightarrow Cu\left(OH\right)_{2\downarrow}\)
__0,075 __ 0,1 ___ → 0,05 (mol)
⇒ m↓ = mCu(OH)2 = 0,05.98 = 4,9 (g)
Bạn tham khảo nhé!