Question

Hoàn thành chuỗi phản ứng :

a) Cu => CuO =>CuCl2 =>CuSO4 =>Cu(OH)2 =>CuO =>Cu

b) P=>P2O5 => H3PO4 =>Ca3PO4

Answer 1

\(2Cu+O_2\rightarrow2CuO\)

\(CuO+2HCl\rightarrow CuCl_2+H_2O\)

\(CuCl_2+BaSO_4\rightarrow CuSO_4+BaCl_2\)

\(CuSO_4+2NaOH\rightarrow Cu\left(OH\right)_2+Na_2SO_4\)

\(Cu\left(OH\right)_2\rightarrow CuO+H_2O\)

\(CuO+H_2\rightarrow Cu+H_2O\)

Answer 2

a) \(Cu\xrightarrow[]{\left(1\right)}CuO\xrightarrow[]{\left(2\right)}CuCl_{2_{ }}\xrightarrow[]{\left(3\right)}CuSO_4\xrightarrow[]{\left(4\right)}Cu\left(OH\right)_2\xrightarrow[]{\left(5\right)}CuO\xrightarrow[]{ \left(6\right)}Cu\)

\(\left(1\right)2Cu+O_2\underrightarrow{ }2CuO\)

\(\left(2\right)CuO+2HCl\underrightarrow{ }CuCl_2+H_2O\)

\(\left(3\right)CuCl_2+Ag_2SO_4\underrightarrow{ }CuSO_4+2AgCl\downarrow\)

\(\left(4\right)CuSO_4+2NaOH\underrightarrow{ }Cu\left(OH\right)_2\downarrow+Na_2SO_4\)

\(\left(5\right)Cu\left(OH\right)_2\underrightarrow{t^o}CuO+H_2O\)

\(\left(6\right)2CuO+C\underrightarrow{ }CO_2\uparrow+2Cu\)

Answer 3

\(4P+5O_2\rightarrow2P_2O_5\)

\(P_2O_5+3H_2O\rightarrow2H_3PO_4\)

\(2H_3PO_4+3Ca\rightarrow Ca_3PO_4+3H_2\)

Answer 4

b) 4P + 5O₂ \(\underrightarrow{to}\) 2P₂O₅

P₂O₅ + 3H₂O → 2H₃PO₄

2H₃PO₄ + 3Ca(OH)₂ → Ca₃(PO₄)₂ + 6H₂O

Answer 5

Mình có viết theo mấy cái đk đấy nhé

Answer 6

a)

1. 2Cu + O₂ \(^{to}\rightarrow\)2CuO

2 . CuO + 2HCl -> CuCl₂ + H₂O

3. CuCl₂ + Ag₂SO₄-> CuSO₄ + 2AgCl \(\downarrow\)

4. CuSO₄ + Ba(OH)₂ -> Cu(OH)₂ \(\downarrow\) + BaSO₄ \(\downarrow\)

5 . Cu(OH)₂ \(^{to}\rightarrow\) CuO + H₂O
6. CuO + H₂ \(^{to}\rightarrow\) Cu + H₂O

Answer 7

a) 2Cu + O₂ \(\underrightarrow{to}\) 2CuO

CuO + 2HCl → CuCl₂ + H₂O

CuCl₂ + Na₂SO₄ → 2NaCl + CuSO₄

CuSO₄ + 2NaOH → Na₂SO₄ + Cu(OH)₂

Cu(OH)₂ \(\underrightarrow{to}\) CuO + H₂O

CuO + CO \(\underrightarrow{to}\) Cu + CO₂