Câu 1:
a) \(Zn+CuSO_4\rightarrow Cu+ZnSO_4\)
\(\left\{{}\begin{matrix}n_{Zn}=\frac{6,5}{65}=0,1\left(mol\right)\\n_{Cu}=n_{Zn}=0,1\left(mol\right)\end{matrix}\right.\)
\(m=m_{Cu}=0,1.64=6,4\left(g\right)\)
b) \(m_{dd}=400+6,5-6,4=401\left(g\right)\)
\(n_{ZnSO4}=n_{Zn}=0,1\left(mol\right)\)
\(m_{ZnSO4}=0,1.161=16,1\left(g\right)\)
\(C\%_{ZnSO4}=\frac{16,1}{401}.100\%=4,01\%\)
2)
a, \(2NaOH+CuSO_4\rightarrow Na_2SO_4+Cu\left(OH\right)_2\)
\(n_{CuSO4}=\frac{400.20\%}{160}=0,5\left(mol\right)\)
\(n_{NaOH}=2n_{CuSO4}=1\left(mol\right)\)
\(\Rightarrow m=m_{NaOH}=1.40=40\left(g\right)\)
b, a là gì ạ
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