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21 tháng 12 2017

(1) \(2NaOH+SO2->Na2SO3+H2O\)

(2) \(Na2SO3+H2SO4->Na2SO4+SO2\uparrow+H2O\)

(3) \(SO3+H2O->H2SO4\)

(4) 2SO2 + \(O2\xrightarrow[V2O5]{t0}2SO3\)

(5) \(2H2SO4\left(đ,n\right)+Cu->CuSO4+SO2+2H2O\)

(6) \(Fe+CuSO4->FeSO4+Cu\)

21 tháng 10 2019
https://i.imgur.com/OoUTpbM.jpg
21 tháng 10 2019

1) Na2O + H2O \(\rightarrow\)2NaOH

2) 2NaOH+ SO2 \(\rightarrow\)Na2SO3 + H2O

3) Na2SO3 + H2SO4\(\rightarrow\) Na2SO4 + H2O+ CO2

4)SO2 + 2KOH \(\rightarrow\)K2SO3 + H2O

21 tháng 12 2017

(1) Cu(OH)2 -t0-> CuO + H2O

(2) CuO + H2 -t0-> Cu + H2O

(3) Cu + Cl2 -t0-> CuCl2

(4) CuCl2 + 2NaOH - > Cu(OH)2 + 2NaCl

(5) Cu(OH)2 + H2SO4 - > CuSO4 + 2H2O

11 tháng 10 2019

Cái nhóm (OH)2 thì xem như là 2 nguyên tử O và 2 nguyên tử H để cân bằng đúng ko ạ?

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

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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↓

9 tháng 6 2017

Bài 1 :

\(\left(1\right)S+O_2-t^0->SO_2\)

\(\left(2\right)SO_2+H_2O-->H_2SO_3\)

\(\left(3\right)H_2SO_3+2NaOH-->Na_2SO_3+2H_2O\)

\(\left(4\right)Na_2SO_3+2HCl-->2NaCl+SO_2\uparrow+H_2O\)

9 tháng 6 2017

Bài 2 :

\(\left(1\right)4P+5O_2-t^0->2P_2O_5\)

\(\left(2\right)P_2O_5+3H_2O-->2H_3PO_4\)

\(\left(3\right)3Na_2CO_3+2H_3PO_4-->2Na_3PO_4+3H_2O+3CO_2\uparrow\)

\(\left(4\right)CO_2+Ca\left(OH\right)_2-->CaCO_3\downarrow+H_2O\)

\(\left(5\right)CaCO_3+H_2SO_4-->CaSO_4+CO_2\uparrow+H_2O\)

17 tháng 12 2017

(1) 2Na+2H2O--->2NaOH+H2

(2) 3NaOH+Al(NO3)3--->Al(OH)3+3NaNO3

(3) 2Al(OH)3--->Al2O3+3H2O

(4) 2Al2O3-đpnc---> 4Al+3O2

(5) 2Al+3H2SO4--->Al2(SO4)3+3H2

(6) Al2(SO4)3+3BaCl2--->3BaSO4+2AlCl3

17 tháng 12 2017

(1) 2Na+2H2O->2NaOH+H2

(2) 3NaOH+AlCl3->Al(OH)3+3NaCl

(3) 2Al(OH)3->Al2O3+3H2O

(4) 2Al2O3-điện phân nóng chảy->4Al+3O2

(5) 2Al+3H2SO4->Al2(SO4)3+3H2

(6) Al2(SO4)3+3BaCl2->3BaSO4+2AlCl3

13 tháng 9 2021

$(1) S + O_2 \xrightarrow{t^o} SO_2$
$(2) SO_2 + H_2O \to H_2SO_3$
$(3) H_2SO_3 + 2NaOH \to Na_2SO_3 + 2H_2O$
$(4) Na_2SO_3 + 2HCl \to 2NaCl +SO_2 + H_2O$
$(5) SO_2 + 2NaOH \to Na_2SO_3 + H_2O$

24 tháng 12 2022

`(1)FeO + H_2SO_4 -> FeSO_4 + H_2O`

`(2)FeSO_4 + Ba(OH)_2 -> Fe(OH)_2 + BaSO_4`

`(3)Fe(OH)_2 -> (t^o, chân.không) FeO + H_2O`

`(4)FeO + 2HCl -> FeCl_2 + H_2O`

15 tháng 4 2021

\((1) CaC_2 + 2H_2O \to Ca(OH)_2 + C_2H_2\\ (2) C_2H_2 + H_2 \xrightarrow{t^o,PbCO_3} C_2H_4\\ (3) C_2H_4 + H_2O \xrightarrow{t^o,H^+} C_2H_5OH\\ (4) C_2H_5OH + O_2 \xrightarrow{men\ giấm} CH_3COOH + H_2O\\ (5) CH_3COOH + C_2H_5OH \buildrel{{H_2SO_4}}\over\rightleftharpoons CH_3COOC_2H_5 + H_2O\)

2 tháng 1 2023

\(1\\ 2Al\left(OH\right)_3\rightarrow\left(t^o\right)Al_2O_3+3H_2O\\ 2\\ Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\\ Al_2\left(SO_4\right)_3+3BaCl_2\rightarrow3BaSO_4+2AlCl_3\)

2 tháng 1 2023

PTHH hàng thứ 3 là PUHH (3)