Question

По цепочками записать уравнения, все уравнять. 1) CuO→ CuSO4 → Cu(OH)2 → CuCl2 → Cu 2) Na → Na2O → NaOH → Na3PO4 3) Al → AlCl3 → Al(OH)3 → Al2O3 → Al 4) S → SO2 → H2SO3 → Na2SO3 +H2O 5) SO3 → X → MgSO4 → Mg 6) CuCl2 → Cu(OH)2 → CuO→ Cu 7) P → P2O5 → H3PO4 → Mg3(PO4)2 +HCl 8) C → CO2 → Na2CO3 ↓+H2O 9) K → K2O → K(ОН)2 → KCl t 10) Zn → ZnO → Zn(NO3)2 → Zn(OH)2

Answer 1

10) 1. 2Zn+ O2 = 2ZnO

2. ZnO+ 2KNO3 = Zn(NO3)2+K2O

3. Zn(NO3)2+ H2 = Zn(OH)2+ 2NO2

9) 1. 4K+ O2= 2K2O

2. K2O+ H2O= K(OH)2

3. K(OH)2+ Cl = KCl+ 2OH

8) не совсем понял, что написано.

7) 1. 4P+5O2=2P2O5

2. P2O5+ 3H2O= 2H3PO4

3. 2H3PO4+3Mg = Mg3(PO4)2 + 3H2

6) 1. 2CuCl+ 2H2O+ O2= 2Cu(OH)2+ 2Cl

2. Cu(OH)2 = CuO+ H2O

3. 2CuO = 2Cu+ O2

5) 1. SO3+ H2O = SO4+ H2

2. SO4+ Mg= MgSO4

3. MgSO4= MgO+ SO3

4) 1. S+ O2 = SO2

2. SO2+ H2O= H2SO3

3. H2SO3+ 2Na = Na2SO3+ H2

3) 1. Al+ 3Cl= AlCl3

2. AlCl3+ 3OH = Al(OH)3+ 3Cl

3. 2Al(OH)3 = Al2O3+ 3H2O

4. 2Al2O3 = 4Al+ 3O2

Answer 2

To balance the chemical equations, we need to ensure that the number of atoms of each element is the same on both sides of the equation. I will provide the balanced equations for each sequence:

1. CuO → CuSO4 → Cu(OH)2 → CuCl2 → Cu

2CuO + H2SO4 → CuSO4 + H2O CuSO4 + 2NaOH → Cu(OH)2 + Na2SO4 Cu(OH)2 + 2HCl → CuCl2 + 2H2O CuCl2 → Cu + Cl2

2. Na → Na2O → NaOH → Na3PO4

4Na + O2 → 2Na2O Na2O + H2O → 2NaOH 3NaOH + H3PO4 → Na3PO4 + 3H2O

3. Al → AlCl3 → Al(OH)3 → Al2O3 → Al

2Al + 6HCl → 2AlCl3 + 3H2 AlCl3 + 3NaOH → Al(OH)3 + 3NaCl 2Al(OH)3 → Al2O3 + 3H2O

4. S → SO2 → H2SO3 → Na2SO3 + H2O

S + O2 → SO2 SO2 + H2O → H2SO3 H2SO3 + 2NaOH → Na2SO3 + 2H2O

5. SO3 → X → MgSO4 → Mg

SO3 + H2O → H2SO4 H2SO4 + MgO → MgSO4 + H2O

6. CuCl2 → Cu(OH)2 → CuO → Cu

CuCl2 + 2NaOH → Cu(OH)2 + 2NaCl Cu(OH)2 → CuO + H2O CuO + H2 → Cu + H2O

7. P → P2O5 → H3PO4 → Mg3(PO4)2 + HCl

4P + 5O2 → 2P2O5 P2O5 + 3H2O → 2H3PO4 2H3PO4 + 3MgCl2 → Mg3(PO4)2 + 6HCl

8. C → CO2 → Na2CO3 + H2O

C + O2 → CO2 CO2 + H2O → H2CO3 H2CO3 + 2NaOH → Na2CO3 + 2H2O

9. K → K2O → K(OH)2 → KCl

4K + O2 → 2K2O K2O + H2O → 2KOH 2KOH + 2HCl → KCl + 2H2O

10. Zn → ZnO → Zn(NO3)2 → Zn(OH)2

2Zn + O2 → 2ZnO ZnO + 2HNO3 → Zn(NO3)2 + H2O Zn(NO3)2 + 2NaOH → Zn(OH)2 + 2NaNO3

Please note that in some cases, the products are not fully specified, represented by 'X'. If you need further clarification or have any other questions, feel free to ask!