1. $Cu_{}$ + $2H_{2}$$SO_{4}$ đặc $\longrightarrow$ $CuSO_{4}$ + $SO_{2}$ + $H_{2}$
2. $Al_{}+$ $6H_{2}$$SO_{4}$ đặc $\longrightarrow$ $Al_{2}$$(SO_{4})3$ + $3SO_{2}+$ $6H_{2}O$
3.$Fe_{}+$ $6HNO_{3}$ $\longrightarrow$ $Fe(NO_{3})3+$ $3NO_{}+$ $3H_{2}O$
4. $4Mg_{}+$ $10HNO_{3}$ $\longrightarrow$ $4Mg(NO_{3})2+$ $N_{2}O+$ $5H_{2}O$
5. $8Al_{}+$ $30HNO_{3}$ $\longrightarrow$ $8Al(NO_{3})3+$ $3NH_{4}$$NO_{3}+$ $9H_{2}O$
6. $3FeO_{}+$ $10HNO_{3}$ $\longrightarrow$ $3Fe(NO_{3})3+$ $NO_{}+$ $5H_{2}O$
7. $K_{2}$$Cr_{2}$$O_{7}+$ $14HCl_{}$ $\longrightarrow$ $2KCl_{}+$ $2CrCl_{2}+$ $4Cl_{2}+$ $7H_{2}O$
8. 3Fe3O4 + 28HNO3 $\longrightarrow$ 9Fe(NO3)3 + NO + 14H2O
@tryphena
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