Question

Напишите уравнения реакций, с помощью которых можно осуществить следующие превращения:1) CuO-->Сu-->CuCl2-->Cu(OH)2-->CuSO42)CuCl2-->Cu-->CuO-->Cu(NO3)2-->Cu(OH)2

Answer 1

1) CuO-->Сu-->CuCl2-->Cu(OH)2-->CuSO4
 3CuO+2Al = 3Cu+Al2O3
Cu+Cl2=CuCl2
CuCl2+2NaOH = Cu(OH)2осадок+2NaCl
Cu(OH)2+H2SO4 = CuSO4+2H2O

2)CuCl2-->Cu-->CuO-->Cu(NO3)2-->Cu(OH)2
CuCl2+Fe = FeCl2 + Cu
2Cu+O2 = 2CuO
CuO+2HNO3 = Cu(NO3)2 + H2O
Cu(NO3)2+2NaOH = 2NaNO3 + Cu(OH)2осадок

Answer 2

Conversion 1: CuO -> Cu -> CuCl2 -> Cu(OH)2 -> CuSO4

To achieve the transformation from CuO to CuSO4, we need to go through several steps. Let's break it down:

1. CuO to Cu: - The reaction involves the reduction of copper(II) oxide (CuO) to copper (Cu). - The balanced equation for this reaction is: CuO + H2 -> Cu + H2O [[1]].

2. Cu to CuCl2: - The reaction involves the reaction of copper (Cu) with hydrochloric acid (HCl) to form copper(II) chloride (CuCl2). - The balanced equation for this reaction is: Cu + 2HCl -> CuCl2 + H2 [[2]].

3. CuCl2 to Cu(OH)2: - The reaction involves the reaction of copper(II) chloride (CuCl2) with sodium hydroxide (NaOH) to form copper(II) hydroxide (Cu(OH)2). - The balanced equation for this reaction is: CuCl2 + 2NaOH -> Cu(OH)2 + 2NaCl [[3]].

4. Cu(OH)2 to CuSO4: - The reaction involves the reaction of copper(II) hydroxide (Cu(OH)2) with sulfuric acid (H2SO4) to form copper(II) sulfate (CuSO4). - The balanced equation for this reaction is: Cu(OH)2 + H2SO4 -> CuSO4 + 2H2O [[4]].

Therefore, the overall balanced equation for the transformation from CuO to CuSO4 is:

CuO + H2 -> Cu + H2O Cu + 2HCl -> CuCl2 + H2 CuCl2 + 2NaOH -> Cu(OH)2 + 2NaCl Cu(OH)2 + H2SO4 -> CuSO4 + 2H2O

Conversion 2: CuCl2 -> Cu -> CuO -> Cu(NO3)2 -> Cu(OH)2

To achieve the transformation from CuCl2 to Cu(OH)2, we need to go through several steps. Let's break it down:

1. CuCl2 to Cu: - The reaction involves the reduction of copper(II) chloride (CuCl2) to copper (Cu). - The balanced equation for this reaction is: CuCl2 + H2 -> Cu + 2HCl [[5]].

2. Cu to CuO: - The reaction involves the oxidation of copper (Cu) to copper(II) oxide (CuO). - The balanced equation for this reaction is: 2Cu + O2 -> 2CuO [[6]].

3. CuO to Cu(NO3)2: - The reaction involves the reaction of copper(II) oxide (CuO) with nitric acid (HNO3) to form copper(II) nitrate (Cu(NO3)2). - The balanced equation for this reaction is: CuO + 2HNO3 -> Cu(NO3)2 + H2O [[7]].

4. Cu(NO3)2 to Cu(OH)2: - The reaction involves the reaction of copper(II) nitrate (Cu(NO3)2) with sodium hydroxide (NaOH) to form copper(II) hydroxide (Cu(OH)2). - The balanced equation for this reaction is: Cu(NO3)2 + 2NaOH -> Cu(OH)2 + 2NaNO3 [[8]].

Therefore, the overall balanced equation for the transformation from CuCl2 to Cu(OH)2 is:

CuCl2 + H2 -> Cu + 2HCl 2Cu + O2 -> 2CuO CuO + 2HNO3 -> Cu(NO3)2 + H2O Cu(NO3)2 + 2NaOH -> Cu(OH)2 + 2NaNO3