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\(2NaOH+CuCl_2\rightarrow2NaCl+Cu\left(OH\right)_2\)

29 tháng 11 2019

a) SO2 + Na2O -> Na2SO3

Na2SO3 + H2SO4 -> Na2SO4 + SO2 + H2O

Na2SO4 + Ba(OH)2 -> BaSO4 \(\downarrow\)+ 2NaOH

2NaOH + CO2 -> Na2CO3 + H2O

b) CaO + CO2 -> CaCO3

CaCO3 \(\rightarrow^{t^o}\) CaO + CO2

CaO + H2O -> Ca ( OH)2

Ca ( OH)2 + CO2 -> CaCO3 + H2O

CaCO3 + H2SO4 -> CaSO4 + CO2 + H2O

29 tháng 11 2019

c) 2Fe + 3Cl2 \(\rightarrow^{t^o}\) 2FeCl3

FeCl3 + 3NaOH -> Fe(OH)3 \(\downarrow\) + 3NaCl

2Fe(OH)3 \(\rightarrow^{t^o}\) Fe2O3 + 3H2O

Fe2O3 + 3H2SO4 -> Fe2(SO4)3 + 3H2O

Fe2(SO4)3 + 3BaCl2 -> 2FeCl3 + 3BaSO4\(\downarrow\)

d) Fe + 2HCl -> FeCl2 + H2

FeCl2 + 2AgNO3 -> 2AgCl\(\downarrow\) + Fe(NO3)2

Fe(NO3)2 + 2NaOH -> Fe(OH)2\(\downarrow\) + 2NaNO3

Fe(OH)2 + H2SO4 -> FeSO4 + 2H2O

8 tháng 10 2020

2Cu + O2 ➝ 2CuO

CuO + H2SO4 ➝ CuSO4 + H2O

CuSO4 + BaCl2 ➝ CuCl2 + BaSO4

CuCl2 + 2AgNO3 ➝ Cu(NO3)2 + 2AgCl↓

Cu(NO3)2 +2NaOH➝Cu(OH)2↓+ 2NaNO3

Cu(OH)2 \(\underrightarrow{t^o}\)CuO + H2O

CuO + H2 ➝ Cu + H2O

Cu + 2H2SO4(đ) \(\xrightarrow[]{t^o}\) CuSO4 + SO2 + 2H2O

CuSO4 + Fe ➝ Cu + FeSO4

Cu + 2H2SO4(đ) \(\xrightarrow[]{t^o}\) CuSO4 + SO2 + 2H2O

8 tháng 7 2021

\(CuCl_2+2KOH\rightarrow Cu\left(OH\right)_2+2KCl\)

8 tháng 7 2021

A

14 tháng 10 2021

2Cu + O2 ➝ 2CuO

CuO + H2SO4 ➝ CuSO4 + H2O

CuSO4 + BaCl2 ➝ CuCl2 + BaSO4

CuCl2 + 2AgNO3 ➝ Cu(NO3)2 + 2AgCl↓

Cu(NO3)2 +2NaOH➝Cu(OH)2↓+ 2NaNO3

Cu(OH)2 to→to→CuO + H2O

CuO + H2 ➝ Cu + H2O

Cu + 2H2SO4(đ)  CuSO4 + SO2 + 2H2O

CuSO4 + Fe ➝ Cu + FeSO4

Cu + 2H2SO4(đ)  CuSO4 + SO2 + 2H2O

17 tháng 10 2021

$Cu \to CuO \to CuSO_4 \to CuCl_2 \to Cu(OH)_2$

$2Cu + O_2 \xrightarrow{t^o} 2CuO$
$CuO + H_2SO_4 \to CuSO_4 + H_2O$
$CuSO_4 + BaCl_2 \to CuCl_2 + BaSO_4$
$CuCl_2 + 2KOH \to Cu(OH)_2 + 2KCl$

28 tháng 6 2017

P2O5 + 3Ca(OH)2 _> Ca3(PO4)+ 3H2O

Fe2O3 + 3H2O  _> 2Fe(OH)3

28 tháng 6 2017

KHÔNG ĐĂNG CÂU HỎI KHÔNG LIÊN QUAN TỚI TOÁN

CHÚC BẠN HỌC GIỎI ! !!

12 tháng 1 2019

\(\left(1\right)Cu+\dfrac{1}{2}O_2\xrightarrow[]{t^0}CuO\\ \left(2\right)CuO+2HCl\rightarrow CuCl_2+H_2O\)

\(\left(3\right)CuCl_2+2NaOH\rightarrow Cu\left(OH\right)_2+2NaCl\\ \left(4\right)Cu\left(OH\right)_2+2HNO_3\rightarrow Cu\left(NO_3\right)_2+2H_2O\\ \left(5\right)Cu\left(NO_3\right)_2+Fe\rightarrow Fe\left(NO_3\right)_2+Cu\\ \left(6\right)Fe\left(NO_3\right)_2+2NaOH\rightarrow Fe\left(OH\right)_2+2NaNO_3\)

25 tháng 11 2019

1. \(CaO+H_2O\rightarrow Ca\left(OH\right)_2\)

2. \(Cu+Cl_2\rightarrow CuCl_2\)

Đề j đâu mà 2 cái pt đầu đã tự cân bằng

3. \(Zn+2HCl\rightarrow ZnCl_2+H_2\)

25 tháng 11 2019

\(CaO+H_2O\rightarrow Ca\left(OH\right)_2\)

\(Cu+Cl_2\rightarrow CuCl_2\)

\(Zn+2HCl\rightarrow ZnCl_2+H_2\)

Câu 1 ) A / Mg(NO3) \(\underrightarrow{\left(1\right)}\) Mg(OH)2 \(\underrightarrow{\left(2\right)}\) MgCl2\(\underrightarrow{\left(3\right)}\) KCl \(\underrightarrow{\left(4\right)}\) KNO3 B/...
Đọc tiếp

Câu 1 ) A / Mg(NO3) \(\underrightarrow{\left(1\right)}\) Mg(OH)2 \(\underrightarrow{\left(2\right)}\) MgCl2\(\underrightarrow{\left(3\right)}\) KCl \(\underrightarrow{\left(4\right)}\) KNO3

B/ \(Na\underrightarrow{\left(1\right)}Na_2O\underrightarrow{\left(2\right)}NaOH\underrightarrow{\left(3\right)}Na_2SO_4\underrightarrow{\left(4\right)}NaCl\underrightarrow{\left(5\right)}NaNO_3\underrightarrow{\left(6\right)}NaCl\underrightarrow{\left(7\right)}NaOH\)

C/\(Mg\underrightarrow{\left(1\right)}MgO\underrightarrow{\left(2\right)}MgCl_2\underrightarrow{\left(3\right)}Mg\left(NO_3\right)_2\underrightarrow{\left(4\right)}Mg\left(OH\right)_2\underrightarrow{\left(5\right)}MgSO_4\underrightarrow{\left(6\right)}MgCO_3\)

D/\(CuSO_4\underrightarrow{\left(1\right)}Cu\left(OH\right)_2\underrightarrow{\left(2\right)}CuO\underrightarrow{\left(3\right)}CuCl_2\underrightarrow{\left(4\right)}Cu\left(OH\right)_2\underrightarrow{\left(5\right)}CuSO_4\)

E/\(CuCl_2\underrightarrow{\left(1\right)}Cu\left(OH\right)_2\underrightarrow{\left(2\right)}CuSO_4\underrightarrow{\left(3\right)}Cu\underrightarrow{\left(4\right)}CuO\)

F/ \(Cu\left(OH\right)_2\underrightarrow{\left(1\right)}CuO\underrightarrow{\left(2\right)}CuCl_2\underrightarrow{\left(3\right)}Cu\left(NO_3\right)_2\underrightarrow{\left(4\right)}NaNO_3\)

G/\(Fe_2O_3\underrightarrow{\left(1\right)}FeCl_3\underrightarrow{\left(2\right)}Fe\left(OH\right)_3\underrightarrow{\left(3\right)}Fe_2O_3\underrightarrow{\left(4\right)}Fe_2\left(SO_4\right)_3\)

H/ \(ZnCl_2\underrightarrow{\left(1\right)}Zn\left(OH\right)_2\underrightarrow{\left(2\right)}ZnCl_2\underrightarrow{\left(3\right)}NaCl\underrightarrow{\left(4\right)}NaNO_3\)

M/\(CuO\underrightarrow{\left(1\right)}CuCl_2\underrightarrow{\left(2\right)}Cu\left(OH\right)_2\underrightarrow{\left(3\right)}CuO\underrightarrow{\left(4\right)}CuSO_4\)

N/\(Fe\left(OH\right)_2\underrightarrow{\left(1\right)}FeO\underrightarrow{\left(2\right)}FeCl_2\underrightarrow{\left(3\right)}Fe\left(ỌH_2\right)\underrightarrow{\left(4\right)}FeSO_4\underrightarrow{\left(5\right)}FeCl_2\underrightarrow{\left(6\right)}Fe\left(NO_3\right)_2\)

Z/ \(Mg\left(OH\right)_2\underrightarrow{\left(1\right)}MgO\underrightarrow{\left(2\right)}MgSO_4\underrightarrow{\left(3\right)}MgCl_2\underrightarrow{\left(4\right)}Mg\left(OH\right)_2\underrightarrow{\left(5\right)}MgCl_2\underrightarrow{\left(6\right)}Mg\left(NO_3\right)_2\)

X/\(Al\left(OH\right)_3\underrightarrow{\left(1\right)}Al_2O_3\underrightarrow{\left(2\right)}AlCl_3\underrightarrow{\left(3\right)}Al\underrightarrow{\left(4\right)}Al_2\left(SO_4\right)_3\)

11
7 tháng 11 2018

g) 1. Fe2O3 + 6HCl → 2FeCl3 + 3H2O

2. FeCl3 + 3NaOH → 3NaCl + Fe(OH)3

3. 2Fe(OH)3 \(\underrightarrow{to}\) Fe2O3 + 3H2O

4. Fe2O3 + 3H2SO4 → Fe2(SO4)3 + 3H2O

7 tháng 11 2018

h) 1. ZnCl2 + 2NaOH → 2NaCl + Zn(OH)2

2. Zn(OH)2 + 2HCl → ZnCl2 + 2H2O

3. ZnCl2 + 2NaOH → 2NaCl + Zn(OH)2

4. NaCl + AgNO3 → NaNO3 + AgCl↓