d

D

1.a

Na + O₂ ->Na₂O

Na₂O + H₂O -> NaOH

NaOH + CO₂ -> Na₂CO₃ + H₂O

Na₂CO_{3 +} H₂SO₄ -> Na₂SO₄ + CO₂ + H₂O

Em tách bài đăng ra nha, 1-2 bài/1 lượt đăng

1b.

NaCl + H₂O -> NaOH + Cl₂ + H₂

NaOH + CO₂ -> Na₂CO₃ + H₂O

Na₂CO₃ + H₂SO₄ -> Na₂SO₄ + CO₂ + H₂O

BaCl₂ + Na₂SO₄ -> NaCl + BaSO₄

AgNO₃ + NaCl -> AgCl + NaNO₃

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have known

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1went   2have   3known   4doing   5will eat

1. went

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4. will eat

chúc may mắn trong thi cử nhé

a, (1) \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)

(2) \(AlCl_3+3NaOH\rightarrow3NaCl+Al\left(OH\right)_{3\downarrow}\)

\(2Al\left(OH\right)_3\underrightarrow{t^o}Al_2O_3+3H_2O\)

(4) \(2Al_2O_3\underrightarrow{đpnc}4Al+3O_2\)

b, (1) \(2Fe+3Cl_2\underrightarrow{t^o}2FeCl_3\)

(2) \(FeCl_3+3NaOH\rightarrow3NaCl+Fe\left(OH\right)_{3\downarrow}\)

(3) \(2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+H_2O\)

(4) \(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)

(5) \(Fe+2HCl\rightarrow FeCl_2+H_2\)

c, (1) \(2Al_2O_3\underrightarrow{đpnc}4Al+3O_2\)

(2) \(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)

(3) \(Al_2\left(SO_4\right)_3+3BaCl_2\rightarrow3BaSO_{4\downarrow}+2AlCl_3\)

(4) \(AlCl_3+3NaOH\rightarrow3NaCl+Al\left(OH\right)_{3\downarrow}\)

d, (1) \(S+O_2\underrightarrow{t^o}SO_2\) 

(2) \(2SO_2+O_2\xrightarrow[V_2O_5]{t^o}2SO_3\)

 (3) \(SO_3+H_2O\rightarrow H_2SO_4\)

(4) \(H_2SO_4+2NaOH\rightarrow Na_2SO_4+2H_2O\)

 (5) \(Na_2SO_4+BaCl_2\rightarrow2NaCl+BaSO_{4\downarrow}\)

e, (1) \(2Al_2O_3\underrightarrow{đpnc}4Al+3O_2\)

(2) \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)

(3) \(AlCl_3+3NaOH\rightarrow3NaCl+Al\left(OH\right)_{3\downarrow}\)

(4) 

(5) \(NaAlO_2+CO_2+2H_2O\rightarrow Al\left(OH\right)_{3\downarrow}+NaHCO_3\)