Đáp án cần chọn là: C

Đáp án A

\(a) 6HCl + KClO_3 \to KCl + 3Cl_2 + 3H_2O\\ b) Cu + \dfrac{1}{2}O_2 + 2HCl \to CuCl_2 + H_2O\\ c) CaO + H_2SO_4 \to CaSO_4 + H_2O\)

a) MnO2+4HCl ----> Cl2+2H2O+MnCl2 --

(2)3Cl2+2Fe--> 2FeCl3 --

(3)FeCl3+3NaOH--> 3AgCl+Fe(OH)3

b) HCl+NaOH ----> NaCl+H2O --

(2)2NaCl--> Cl2+2Na --

(3)Cl2+Cu--> CuCl2

c) 2HCl+Zn ----> ZnCl2+H2 --

(2)ZnCl2+AgNO3--> AgCl+Zn(NO3)2 --

(3)2AgCl+Cu(NO3)2--> CuCl2+2AgNO3

d) 2NaCl ----> Cl2+2Na --

(2)Cl2+H2--> 2HCl --

(3)6HCl+Fe2O3--> 2FeCl3+3H2O

MnO2+HCl--->MnCl2+H2O+Cl2

Cl2+Fe-->FeCl3

FeCl3+AgNO3-->Fe(NO3)3+AgCl

b)

HCl+Na-->NaCl+H2

NaCL+H2O-->NaOH+H2+CL2

Cl2+Cu-->CuCl2

c)

HCl+Zn-->ZnCl2+H2

ZnCL2+AgNO3-->AgCl+Zn(NO3)2

d)

NaCl+H2O-->NaOH+Cl2+H2

Cl2+H2-->HCl

HCl+Fe2O3-->FeCl3+H2O

a,

\(\left(1\right)MnO_2+4HCl\rightarrow MnCl_2+Cl_2+2H_2O\)

\(\left(2\right)2Fe+3Cl_2\underrightarrow{^{to}}2FeCl_3\)

\(\left(3\right)FeCl_3+3AgNO_3\rightarrow Fe\left(NO_3\right)_3+3AgCl\)

b,

\(\left(1\right)NaOH+HCl\rightarrow NaCl+H_2O\)

\(\left(2\right)2NaCl\underrightarrow{^{đpnc}}2Na+Cl_2\)

\(\left(3\right)Cu+Cl_2\underrightarrow{^{to}}CuCl_2\)

c,

\(\left(1\right)Zn+2HCl\rightarrow ZnCl_2+H_2\)

\(\left(2\right)ZnCl_2+2AgNO_3\rightarrow Zn\left(NO_3\right)_2+2AgCl\)

d,

\(\left(1\right)2NaCl\underrightarrow{^{đpnc}}2Na+Cl_2\)

\(\left(2\right)H_2+Cl_2\underrightarrow{^{askt}}2HCl\)

\(\left(3\right)Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\)

1,

\(4HCl+MnO_2\rightarrow MnCl_2+2H_2O+Cl_2\\ 2Fe+3Cl_2\underrightarrow{t^o}2FeCl_3\\ FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3\downarrow+3NaCl\\ 2NaCl+H_2SO_4\rightarrow Na_2SO_4+2HCl\uparrow\\ CuO+2HCl\rightarrow CuCl_2+H_2O\\ CuCl_2+2AgNO_3\rightarrow2AgCl\downarrow+Cu\left(NO_3\right)_2\)

2,

\(2KMnO_4+16HCl\rightarrow2KCl+8H_2O+5Cl_2+2MnCl_2\\ Cl_2+H_2\underrightarrow{as}2HCl\\ 6HCl+Fe_2O_3\rightarrow2FeCl_3+3H_2O\\ FeCl_3+3AgNO_3\rightarrow3AgCl\downarrow+Fe\left(NO_3\right)_3\\ 2AgCl\underrightarrow{as}2Ag+Cl_2\\ Cl_2+2NaBr\rightarrow2NaCl+Br_2\\ Br_2+2NaI\rightarrow2NaBr+I_2\)

3,

2 pthh đầu giống ở 2

\(Fe+2HCl\rightarrow FeCl_2+H_2\\ FeCl_2+2AgNO_3\rightarrow2AgCl\downarrow+Fe\left(NO_3\right)_2\\ 2AgCl\underrightarrow{as}2Ag+Cl_2\)

4, 2 pthh đầu gióng ở 1

\(FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3\downarrow+3NaCl\\ 2Fe\left(OH\right)_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O\)

\(H_2 + Cl_2 \xrightarrow{ánh\ sáng} 2HCl\\ Fe + 2HCl \to FeCl_2 + H_2\\ 2FeCl_2 + Cl_2 \to 2FeCl_3\\ FeCl_3 + 3KOH \to Fe(OH)_3 + 3KCl\\ Fe(OH)_3 + 3HCl \to FeCl_3 + 3H_2O\\ 4HCl + MnO_2 \to MnCl_2 + Cl_2 + 2H_2O\\ \)

\(2NaOH + Cl_2 \to NaCl + NaClO + H_2O\\ NaCl + H_2SO_4 \xrightarrow{t^o} NaHSO_4 + HCl\\ CuO + 2HCl \to CuCl_2 + H_2O\\ CuCl_2 + 2AgNO_3 \to Cu(NO_3)_2 + 2AgCl\)

1.

Cl2 + H2O <->HCl + HClO2HCl + Fe -> FeCl2 + H22FeCl2 + Cl2 -to> 2FeCl3FeCl3 + NaOH -> Fe(OH)3 + NaCl

2Fe(OH)3+6HCl->2FeCl3+3H2O

b>4HCl+MnO2->MnCl2+2H2O+Cl2

Cl2+2Na-to>2NaCl

2NaCl+2H2SO4đ-to>Na2SO4+2HCl

HCl+CuO->CuCl2+H2O

CuCl2+2AgNO3->2AgCl+Cu(NO3)2

a)

\(KClO_3 + 6HCl \to 5KCl + Cl_2 + 3H_2O\\ Cl_2 + H_2O \rightleftharpoons HCl + HClO\\ HClO \xrightarrow{ánh\ sáng} HCl + \dfrac{1}{2}O_2\\ 2HCl + Mg \to MgCl_2 + H_2\\ MgCl_2 + 2AgNO_3 \to Mg(NO_3)_2 + 2AgCl\\ 2AgCl \xrightarrow{ánh\ sáng} 2Ag + Cl_2\\ Cl_2 + 2KBr \xrightarrow{t^o} 2KCl + Br_2\\ Br_2 + 2K \xrightarrow{t^o} 2KBr\\ KBr + Cl_2 \to 2KCl + Br_2\\ KCl + H_2SO_4 \xrightarrow{t^o} 2KHSO_4 + HCl\)

b)

\(NaOH + HCl \to NaCl + H_2O\\ NaCl + H_2SO_4 \xrightarrow{t^o} NaHSO_4 + HCl\\ 4HCl + MnO_2 \to MnCl_2 + Cl_2 + 2H_2O\\ Cl_2 + H_2 \xrightarrow{ánh\ sáng} 2HCl\\ 2HCl + CuO \to CuCl_2 + H_2O\\ CuCl_2 + 2KOH \to Cu(OH)_2 + 2KCl\\ Cu(OH)_2 \xrightarrow{t^o} CuO + H_2O\\ CuO + 2HCl \to CuCl_2 + H_2O\\ CuCl_2 + 2KOH \to Cu(OH)_2 + 2KCl\\ 2KCl \xrightarrow{đpnc} 2K + Cl_2\)

1.

\(MnO_2+4HCl\rightarrow MnCl_2+Cl_2+2H_2O\)

\(H_2+Cl_2\underrightarrow{^{as}}2HCl\)

\(NaOH+HCl\rightarrow NaCl+H_2O\)

\(2NaCl\underrightarrow{^{đpnc}}2Na+Cl_2\)

\(4Cl_2+H_2S+4H_2O\rightarrow8HCl+H_2SO_4\)

\(NaCl+H_2SO_4\rightarrow NaHSO_4+HCl\)

2.

\(2KMnO_4+16HCl\rightarrow2KCl+2MnCl_2+5Cl_2+8H_2O\)

\(6KOH+3Cl_2\rightarrow5KCl+KClO_3+3H_2O\)

\(KClO_3+6HCl\rightarrow KCl+3Cl_2+3H_2O\)

\(Fe+\frac{3}{2}Cl_2\underrightarrow{^{to}}FeCl_3\)

\(FeCl_3+3KOH\rightarrow Fe\left(OH\right)_3+3KCl\)

\(2KCl+2H_2O\underrightarrow{^{đpmn}}2KOH+Cl_2+H_2\)

3.

\(BaCl_2\underrightarrow{^{đpnc}}Ba+Cl_2\)

\(Cl_2+H_2\underrightarrow{^{as}}2HCl\)

\(Fe+2HCl\rightarrow FeCl_2+H_2\)

\(2FeCl_2+3Cl_2\rightarrow2FeCl_3\)

\(3Ba\left(OH\right)_2+2FeCl_3\rightarrow3BaCl_2+2Fe\left(OH\right)_3\)

\(BaCl_2+H_2SO_4\rightarrow BaSO_4+2HCl\)

4.

\(C_2H_2+Cl_2\rightarrow2C+2HCl\)

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

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

\(2KCl+2H_2O\underrightarrow{^{đpmn}}2KOH+H_2+Cl_2\)

\(3Cl_2+6KOH\rightarrow5KCl+KClO_3+3H_2O\)

\(KClO_3+6HCl\rightarrow KCl+3Cl_2+3H_2O\)

5.

\(MnO_2+4HCl\rightarrow MnCl_2+Cl_2+2H_2O\)

\(2Fe+3Cl_2\rightarrow2FeCl_3\)

\(FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\)

\(NaCl+H_2SO_4\rightarrow NaHSO_4+HCl\)

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

\(CuCl_2+AgNO_3\rightarrow Cu\left(NO_3\right)_2+2AgCl\)

6.

\(NaCl+H_2SO_4\rightarrow NaHSO_4+HCl\)

\(MnO_2+4HCl\rightarrow MnCl_2+Cl_2+H_2O\)

\(6KOH+3Cl_2\rightarrow5KCl+KClO_3+3H_2O\)

\(KClO_3+6HCl\rightarrow KCl+3Cl_2+3H_2O\)

\(2KCl\underrightarrow{^{đpnc}}2K+Cl_2\)

\(Cl_2+Ca\left(OH\right)_2\rightarrow CaOCl_2+H_2O\)

1. MnO2 +4HCl→ Cl2+MnCl2+4H2O

Cl2+2H2→ 2HCl

HCl+Na2O→ NaCl+H2O

2NaCl → Cl2+2Na

2Cl2+2H2O+CO2→ H2SO4 +4HCl

H2SO4+BaCl2→ 2HCl+BaSO4

2. 2KMnO4 +16HCl→ 5Cl2+8H2O+2KCl+2MnCl2

2Cl2+6KOH→ KClO3 +5KCl+3H2O

KClO3+6HCl→ 3Cl2+KCl+3H2O

3Cl2+2Fe→2 FeCl3

FeCl3+3KOH→ 3KCl +Fe(OH)3

2KCl+2H2O→ KOH+Cl2+2H2O

3. BaCl2 → Cl2+Ba

Cl2+2H2→ 2HCl

2HCl+Fe→ FeCl2+H2

2FeCl2+Cl2→ 2FeCl3

2FeCl3+3Ba(OH)2→ 3BaCl2+2Fe(OH)3

BaCl2+H2SO4→ 2HCl+BaSO4

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