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TN1:
1. `\text{ZnSO}_4 + \text{K}_4[\text{Fe(CN)}_6] \rightarrow \text{Zn}_2[\text{Fe(CN)}_6] \downarrow + \text{K}_2\text{SO}_4`
2. `\text{Zn}_2[\text{Fe(CN)}_6] + \text{CuSO}_4 \rightarrow \text{Cu}_2[\text{Fe(CN)}_6] \downarrow + \text{ZnSO}_4`
TN2:
`\text{FeSO}_4 + \text{Na}_2\text{CO}_3 \rightarrow \text{FeCO}_3 \downarrow + \text{Na}_2\text{SO}_4`
TN3:
1. `\text{FeSO}_4 + \text{K}_3[\text{Fe(CN)}_6] \rightarrow \text{Fe}_3[\text{Fe(CN)}_6]_2 \downarrow + \text{K}_2\text{SO}_4`
2. `\text{Fe}_3[\text{Fe(CN)}_6]_2 + \text{NaOH} \rightarrow \text{Fe(OH)}_3 + \text{Na}_3[\text{Fe(CN)}_6]`
3. `\text{Fe}_3[\text{Fe(CN)}_6]_2 + \text{HCl} \rightarrow \text{không tan}`
TN4:
1. `\text{FeCl}_3 + \text{NH}_4\text{SCN} \rightarrow \text{Fe(SCN)}_3 \downarrow + \text{NH}_4\text{Cl}`
2. `\text{Fe(SCN)}_3 + \text{NaF} \rightarrow \text{FeF}_3 + \text{NaSCN}`
3. `\text{Fe(SCN)}_3 + \text{Na}_2\text{CO}_3 \rightarrow \text{FeCO}_3 + \text{NaSCN}`
TN5:
`\text{NaNO}_3 + \text{HNO}_3 + \text{Zn} + \text{KMnO}_4 \rightarrow \text{Na}_2\text{MnO}_4 + \text{KNO}_3 + \text{H}_2\text{O}`
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