Question

решить цепочки, и в случае если реакция не идет, объяснить почему1) Cu + HNO3 (р-р) ->2) Zn + HCl (р-р) ->3) Cu + H2SO4 (конц) ->4) Hg +H2SO4 (конц)->5) ZnO + Al2O3 ->6) HCl + Al2O3 ->7) NaOH + Al2O3 ->8) HNO3 + Al2O3 ->9) Al(OH)3 + KOH ->10) Al(OH)3 + HCl ->

Answer 1

1)3Cu + 8HNO₃(р) = 2NO↑ + 3Cu(NO₃)₂ +4 H₂O

2)2HCl + Zn = ZnCl₂ + H₂↑

3)Cu + 2H₂SO₄(к) = SO₂ + CuSO₄ + 2H₂O

4)2Hg + 2H₂SO₄(к) =  SO₂ + Hg₂SO₄ + 2H₂O

5)ZnO + Al₂O₃ =ZnAl₂O₄ (не уверена)

6)6HCl + Al₂O₃ = 2AlСl₃ + 3Н₂О

7)если берем NaOH как раствор, то реакция такая

NaOH(р-р) + Al₂O₃ = Na₃[Al(OH)₆] + H₂O

а если как расплав, то:

NaOH(расплав) + Al₂O₃ = 2NaAlO₂ + H₂O\

8) 6HNO₃ + Al₂O₃ =3H₂O + 2Al(NO₃)₃

9) Al(OH)₃ + 3KOH = K₃[Al(OH)₆]

10) Al(OH)₃ + 3HCl = AlCl₃ + 3H₂O

Answer 2

Reaction Chain Analysis:

Let's analyze the given reaction chain step by step:

1) Cu + HNO3 (aq) -> 2) Zn + HCl (aq) -> 3) Cu + H2SO4 (conc) -> 4) Hg + H2SO4 (conc) -> 5) ZnO + Al2O3 -> 6) HCl + Al2O3 -> 7) NaOH + Al2O3 -> 8) HNO3 + Al2O3 -> 9) Al(OH)3 + KOH -> 10) Al(OH)3 + HCl ->

Step 1: Cu + HNO3 (aq)

The reaction between copper (Cu) and nitric acid (HNO3) produces copper(II) nitrate (Cu(NO3)2) and nitric oxide (NO) gas. The balanced equation for this reaction is:

Cu + 4HNO3 -> Cu(NO3)2 + 2NO2 + 2H2O [[1]]

Step 2: Zn + HCl (aq)

The reaction between zinc (Zn) and hydrochloric acid (HCl) produces zinc chloride (ZnCl2) and hydrogen (H2) gas. The balanced equation for this reaction is:

Zn + 2HCl -> ZnCl2 + H2 [[2]]

Step 3: Cu + H2SO4 (conc)

The reaction between copper (Cu) and concentrated sulfuric acid (H2SO4) produces copper(II) sulfate (CuSO4), sulfur dioxide (SO2) gas, and water (H2O). The balanced equation for this reaction is:

Cu + 2H2SO4 -> CuSO4 + SO2 + 2H2O [[3]]

Step 4: Hg + H2SO4 (conc)

The reaction between mercury (Hg) and concentrated sulfuric acid (H2SO4) produces mercury(II) sulfate (HgSO4), sulfur dioxide (SO2) gas, and water (H2O). The balanced equation for this reaction is:

Hg + H2SO4 -> HgSO4 + SO2 + H2O [[4]]

Step 5: ZnO + Al2O3

The reaction between zinc oxide (ZnO) and aluminum oxide (Al2O3) does not occur under normal conditions. There is no balanced equation for this reaction.

Step 6: HCl + Al2O3

The reaction between hydrochloric acid (HCl) and aluminum oxide (Al2O3) does not occur under normal conditions. There is no balanced equation for this reaction.

Step 7: NaOH + Al2O3

The reaction between sodium hydroxide (NaOH) and aluminum oxide (Al2O3) does not occur under normal conditions. There is no balanced equation for this reaction.

Step 8: HNO3 + Al2O3

The reaction between nitric acid (HNO3) and aluminum oxide (Al2O3) does not occur under normal conditions. There is no balanced equation for this reaction.

Step 9: Al(OH)3 + KOH

The reaction between aluminum hydroxide (Al(OH)3) and potassium hydroxide (KOH) produces potassium aluminate (KAl(OH)4). The balanced equation for this reaction is:

Al(OH)3 + KOH -> KAl(OH)4 [[5]]

Step 10: Al(OH)3 + HCl

The reaction between aluminum hydroxide (Al(OH)3) and hydrochloric acid (HCl) produces aluminum chloride (AlCl3) and water (H2O). The balanced equation for this reaction is:

Al(OH)3 + 3HCl -> AlCl3 + 3H2O [[6]]

Summary:

Based on the given reaction chain, we can conclude that steps 1, 2, 3, 4, 9, and 10 are valid reactions. Steps 5, 6, 7, and 8 do not occur under normal conditions.

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