SO2 + H2S → S + H2O

H2S + HNO3 → H2SO4 + NO2 + H2O

H2SO4 + BaCl2 → BaSO4 + HCl

HCl + MnO2 → MnCl2 + Cl2 + H2O

Cl2 + NaOH → NaCl + NaClO + H2O

để e lên lớp 8 đã

Đăng tầm 11 -> 12 h đêm mới có ng giúp :))

SO2 + H2S → S + H2O

H2S + HNO3 → H2SO4 + NO2 + H2O

H2SO4 + BaCl2 → BaSO4 + HCl

HCl + MnO2 → MnCl2 + Cl2 + H2O

Cl2 + NaOH → NaCl + NaClO + H2O

1/

MnO₂+ 4HCl\(\rightarrow\) MnCl₂+ Cl₂+ 2H₂O

Cl₂+H₂\(\xrightarrow[]{as}\) 2HCl

HCl+ NaOH\(\rightarrow\) NaCl+ H₂O

2NaCl\(\xrightarrow[]{đpnc}\) 2Na+ Cl₂

Cl₂+ SO₂+ 2H₂O\(\rightarrow\) H₂SO₄+ 2HCl

H₂SO_{4 đặc}+ NaCl_{tinh thể}\(\xrightarrow[]{< 250\cdot C}\) NaHSO₄+ HCl

4/

H₂SO_{4 đặc}+ NaCl_{tinh thể}\(\xrightarrow[]{< 250\cdot C}\) NaHSO₄+ HCl

MnO₂+ 4HCl\(\rightarrow\) MnCl₂+ Cl₂+ 2H₂O

3Cl₂+ 6KOH_đặc\(\rightarrow\) KClO₃+ 5KCl+ 3H₂O

2KClO₃\(\xrightarrow[MnO2]{to}\) 2KCl+ 3O₂

2KCl\(\xrightarrow[]{đpnc}\) K+ Cl₂

Cl₂+ Ca(OH)₂\(\xrightarrow[]{30\cdot C}\) CaOCl₂+ H₂O

1, \(MnO_2+4HCl\underrightarrow{t^o}MnCl_2+Cl_2+2H_2O\)

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

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

\(2NaCl+2H_2O\xrightarrow[cmn]{đpdd}2NaOH+Cl_2+H_2\)

\(4Cl_2+4H_2O+H_2S\rightarrow H_2SO_4+8HCl\)

\(H_2SO_4+NaCl\underrightarrow{>400^oC}Na_2SO_4+HCl\uparrow\)

2, \(2KMnO_4+18HCl\rightarrow2KCl+2MnCl_2+5Cl_2+8H_2O\)

\(3Cl_2+2Fe\underrightarrow{t^o}2FeCl_3\)

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

\(2KCl+2H_2O\xrightarrow[cmn]{đpdd}2KOH+Cl_2+H_2\)

3, \(4HCl+MnO_2\underrightarrow{t^o}MnCl_2+Cl_2+2H_2O\)

\(3Cl_2+2Fe\underrightarrow{t^o}2FeCl_3\)\(FeCl_3+3NaOH\rightarrow3NaCl+Fe\left(OH\right)_3\downarrow\)

\(2NaCl+H_2SO_4\underrightarrow{>400^oC}Na_2SO_4+2HCl\)

\(2HCl+Cu\left(OH\right)_2\rightarrow CuCl_2+2H_2O\)

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

4, \(H_2SO_4+2NaCl\underrightarrow{>400^oC}Na_2SO_4+2HCl\uparrow\)

\(4HCl+MnO_2\underrightarrow{t^o}MnCl_2+Cl_2+2H_2O\)

\(3Cl_2+6KOH\underrightarrow{80-100^oC}5KCl+KClO_3+3H_2O\)

\(2KClO_3\underrightarrow{t^o}2KCl+3O_2\)

\(2KCl+2H_2O\xrightarrow[cmn]{đpdd}2KOH+Cl_2+H_2\)

\(Cl_2+Ca\left(OH\right)_2\underrightarrow{30^oC}CaOCl_2+H_2O\)

Bạn tham khảo nhé!

1.

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

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

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

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

\(Cl_2+SO_2+2H_2O\rightarrow2HCl+H_2SO_4\)

\(NaCl+H_2SO_{4_đ}\underrightarrow{^{to}}NaHSO_4+HCl\)

2.

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

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

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

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

3.

\(MnO_2+4HCl\underrightarrow{^{to}}MnCl_2+Cl_2+2H_2O\)

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

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

\(NaCl+H_2SO_{4_Đ}\underrightarrow{^{to}}NaHSO_4+HCl\)

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

\(CuCl_2+2AgNO_3\rightarrow2AgCl+Cu\left(NO_3\right)_2\)

4.

\(NaCl+H_2SO_{4_Đ}\underrightarrow{^{to}}NaHSO_4+HCl\)

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

\(3Cl_2+6KOH\underrightarrow{^{to}}5KCl+KClO_3+3H_2O\)

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

\(Cl_2+CaO\underrightarrow{^{to}}CaOCl_2\)

1) \(\overset{+2}{Fe}\overset{-1}{S_2}+\overset{0}{O_2}\rightarrow\overset{+3}{Fe_2}\overset{-2}{O_3}+\overset{+4}{S}\overset{-2}{O_2}\)

quá trình OXH :\(\overset{+2}{Fe}\overset{-1}{S_2}\rightarrow\overset{+3}{Fe}+\overset{+4}{2S}+11e|\times4\)

quá trình khử : \(\overset{0}{2O}+2.2e\rightarrow\overset{-2}{2O}|\times11\)

2) \(\overset{+2}{Fe}\overset{-2}{S}+H\overset{+5}{N}O_3\rightarrow\overset{+3}{Fe}\left(\overset{+5}{N}O_3\right)_3+\overset{+2}{N}\overset{-2}{O}+H_2O+H_2\overset{+6}{S}O_4\)

quá trình OXH : \(\overset{+2}{Fe}\overset{-2}{S}\rightarrow\overset{+3}{Fe}+\overset{+6}{S}+9e|\times1\)

quá trình khử : \(\overset{+5}{N}+3e\rightarrow\overset{+2}{N}|\times3\)

\(\Rightarrow FeS+6HNO_3\rightarrow Fe\left(NO_3\right)_3+3NO+2H_2O+H_2SO_4\)

CÒN ĐỂ CHIỀU MK LM CHO NHA

Tự cân bằng nhá!
a,

\(HCl+MnO_2\rightarrow MnCl_2+Cl_2+H_2O\\ Cl_2+Fe\rightarrow FeCl_3\\ FeCl_3+NaOH\rightarrow Fe\left(OH\right)_3+NaCl\\ NaCl+H_2SO_{4\left(dn\right)}\rightarrow Na_2SO_4+HCl\\ HCl+CuO\rightarrow CuCl_2+H_2O\\ CuCl_2+AgNO_3\rightarrow Cu\left(NO_3\right)_2+AgCl\)
b,

\(KMnO_4+HCl\rightarrow KCl+MnCl_2+Cl_2+H_2O\\ Cl_2+H_2\rightarrow HCl\\ HCl+Fe\left(OH\right)_3\rightarrow FeCl_3+H_2O\\ FeCl_3+AgNO_3\rightarrow Fe\left(NO_3\right)_3+AgCl\\ AgCl-as,t^o->Ag+Cl_2\\ Cl_2+NaBr\rightarrow NaCl+Br_2\\ Br_2+NaI\rightarrow NaBr+I_2\)

c, Giống câu b 3 pt đầu
\(HCl+Fe\left(OH\right)_2\rightarrow FeCl_2+H_2O\\ FeCl_2+AgNO_3\rightarrow Fe\left(NO_3\right)_2+AgCl\\ AgCl-as,t^o->Ag+Cl_2\)
d,

\(HCl+MnO_2\rightarrow MnCl_2+Cl_2+H_2O\\ Cl_2+Fe\rightarrow FeCl_3\\ FeCl_3+NaOH\rightarrow Fe\left(OH\right)_3+NaCl\\ Fe\left(OH\right)_3+H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+H_2O\)
e,

\(HCl+MnO_2\rightarrow MnCl_2+Cl_2+H_2O\\ Cl_2+NaOH\rightarrow NaCl+NaClO+H_2O\\ NaCl+H_2SO_{4\left(dn\right)}\rightarrow Na_2SO_4+HCl\\ CuO+HCl\rightarrow CuCl_2+H_2O\\ CuCl_2+AgNO_3\rightarrow Cu\left(NO_3\right)_2+AgCl\\ AgCl-as,t^o->Ag+Cl_2\)
f,

\(MnO_2+HCl\rightarrow MnCl_2+Cl_2+H_2O\\ Cl_2+KOH-t^o->KClO_3+KCl+H_2O\\ KClO_3\rightarrow KCl+O_2\\ KCl+H_2SO_{4\left(dn\right)}\rightarrow K_2SO_4+HCl\\ HCl+MnO_2\rightarrow MnCl_2+Cl_2+H_2O\\ Ca\left(OH\right)_2+Cl_2\rightarrow CaCl_2+Ca\left(ClO\right)_2+H_2O\)

điều kiện lun nha mn

1) 2KClO₃ \(\underrightarrow{to}\) 2KCl + 3O₂

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

P₂O₅ + 3H₂O → 2H₃PO₄

2H₃PO₄ + 3Ca → Ca₃(PO₄)₂ + 3H₂

2) 2KClO₃ \(\underrightarrow{to}\) 2KCl + 3O₂

O₂ + 4Na → 2Na₂O

Na₂O + H₂O → 2NaOH

2KClO₃ \(\underrightarrow{to}\) 2KCl + 3O₂

O₂ + 2H₂ \(\underrightarrow{to}\) 2H₂O

2H₂O \(\xrightarrow[phân]{điện}\) 2H₂ + O₂

2H₂ + O₂ \(\underrightarrow{to}\) 2H₂O

H₂O + K₂O → 2KOH

a) \(K_2O+H_2O->2KOH\)

b) \(2Fe+3Cl_2->2FeCl_3\)

c) \(2Al\left(OH\right)_3+3H_2SO_4->Al_2\left(SO_4\right)_3+6H_2O\)

d) \(4FeS_2+11O_2->2Fe_2O_3+8SO_2\)

e)\(2Al+6HCl->2AlCl_3+3H_2\)

f) \(2KClO_3->KCl+3O_2\)

g) \(4P+5O_2->2P_2O_5\)

h) \(3Fe+2O_2->Fe_3O_4\)

i) \(2Al+3CuSO_4->Al_2\left(SO_4\right)_3+3Cu\)

j) \(2K+2H_2O->2KOH+H_2\)

Cu+2H₂SO_{4 đặc nóng}\(\rightarrow\)CuSO₄+SO₂+H₂O

SO₂+H₂O\(\rightarrow\)H₂SO₃

H₂SO₃+2NaOH\(\rightarrow\)Na₂SO₃+2H₂O

Na₂SO₃+H₂SO₄\(\rightarrow\)Na₂SO₄+SO₂+H₂O

2ClO3->Cl2+3O2

O2+2H2S->2S+2H2O

S+O2-tO>SO2

2SO2+O2+2H2O-to, V2O5>2H2SO4

H2SO4+FeO->FeSO4+H2O

S+H2-to>H2S

H2S+4Cl2+4H2o->H2SO4+8HCl

H2SO4+Na2CO3->Na2SO4+H2O+CO2