Đáp án:

 `↓`

Giải thích các bước giải:

`52.` `4Al` + $3O_{2}$ $→^{to}$ $2Al_{2}$$O_{3}$

`53.` `3Fe` + $2O_{2}$ $→^{to}$ $Fe_{3}$$O_{4}$

`54.` $2Al(OH)_{3}$ $→^{to}$ $Al_{2}$$O_{3}$ + $3H_{2}$`O`

`55.` $2Fe(OH)_{3}$ $→^{to}$ $Fe_{2}$$O_{3}$ + $3H_{2}$`O`

`56.` `4Li` + $O_{2}$ $→^{to}$ $2Li_{2}$`O`

`57.` $H_{3}$$PO_{4}$ + `3NaOH` `→` $Na_{3}$$PO_{4}$ + $3H_{2}$`O`

`58.` $H_{2}$$SO_{4}$ +`2KOH` `→` $K_{2}$$SO_{4}$ + $2H_{2}$`O`

`59.` $Fe_{2}$$(SO4)_{3}$ + `6NaOH` `→` $3Na_{2}$$SO_{4}$ + $2Fe(OH)_{3}$`↓`

`60.` $H_{2}$$SO_{4}$ + `2NaOH` `→` $Na_{2}$$SO_{4}$ + $2H_{2}$`O`

`61.` `Cu` + $2AgNO_{3}$ `→` $Cu(NO3)_{2}$ + `2Ag`

`62.` `Zn` + $2AgNO_{3}$ `→` $Zn(NO3)_{2}$ + `2Ag`

`63.` `Fe` + $2AgNO_{3}$ `→` $Fe(NO3)_{2}$ + `2Ag`

`64.` `Al` + $3AgNO_{3}$ `→` $Al(NO3)_{3}$ + `3Ag`

`65.` `2Fe` + $3Cl_{2}$ $→^{to}$ $2FeCl_{3}$

`66.` `2Al` + `3S` $→^{to}$ $Al_{2}$$S_{3}$

`67.` $Fe_{2}$$(SO4)_{3}$ + `6KOH` `→` $3K_{2}$$SO_{4}$ + $2Fe(OH)_{3}$

`68.` $2Fe(OH)_{3}$ $→^{to}$ $Fe_{2}$$O_{3}$ + $3H_{2}$`O`

Đáp án+ giải thích các bước giải:

52)4Al+3O2→2Al2O34Al+3O2→2Al2O3

53)3Fe+2O2→Fe3O43Fe+2O2→Fe3O4

54)2Al(OH)3→Al2O3+3H2O2Al(OH)3→Al2O3+3H2O

55)2Fe(OH)3→Fe2O3+3H2O2Fe(OH)3→Fe2O3+3H2O

56)4Li+O2→2Li2O4Li+O2→2Li2O

57)H3PO4+3NaOH→Na3PO4+3H2OH3PO4+3NaOH→Na3PO4+3H2O

58)H2SO4+2KOH→K2SO4+2H2OH2SO4+2KOH→K2SO4+2H2O

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