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a)\(4FeS_2+11O_2\underrightarrow{t^o}2Fe_2O_3+8SO_2\)
\(2SO_2+O_2\underrightarrow{t^o}2SO_3\)
\(SO_3+H_2O\rightarrow H_2SO_4\)
b)\(m_{H_2SO_4}=\dfrac{50\cdot49\%}{100\%}=24,5g\Rightarrow n_{H_2SO_4}=0,25mol\)
Từ quá trình trên: \(4FeS_2\rightarrow H_2SO_4\)
\(\Rightarrow n_{FeS_2}=\dfrac{1}{4}n_{H_2SO_4}=\dfrac{1}{4}\cdot0,25=\dfrac{1}{16}mol\)\
\(m_{FeS_2}=\dfrac{1}{16}\cdot120=7,5g\)
c)\(n_{NaOH}=0,3\cdot1=0,3mol\)
\(SO_2+2NaOH\rightarrow Na_2SO_3+H_2O\)
0,15 0,3 0,15
\(m_{Na_2SO_3}=0,15\cdot126=18,9g\)
-S+O2-to>SO2
-2SO2+O2-to>2SO3
-SO3+H2O->H2SO4
=>sr bn mk lp 8 nên bt đc bn thì giúp đc ạ
\(2NaOH+Cl_2\rightarrow NaCl+NaClO+H_2O\)
\(H_2S+4Br_2+4H_2O\rightarrow8HBr+H_2SO_4\)
\(NaCl+AgNO_3\rightarrow AgCl+NaNO_3\)
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
H2SO4 đặc+ NaCltinh thể\(\xrightarrow[]{< 250\cdot C}\) NaHSO4+ HCl
4/
H2SO4 đặc+ NaCltinh thể\(\xrightarrow[]{< 250\cdot C}\) NaHSO4+ HCl
MnO2+ 4HCl\(\rightarrow\) MnCl2+ Cl2+ 2H2O
3Cl2+ 6KOHđặc\(\rightarrow\) 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!
\(2KMnO_4+16HCl\rightarrow2KCl+2MnCl_2+5Cl_2+8H_2O\)
\(Cl_2+H_2\underrightarrow{as}2HCl\)
\(2HCl+Mg\rightarrow MgCl_2+H_2\)
\(MgCl_2+2AgNO_3\rightarrow2AgCl+Mg\left(NO_3\right)_2\)
a. (1) 2KClO3 \(\underrightarrow{t}\) 3O2 + 2KCl
(2) 5O2 + 4P → 2P2O5
(3) P2O5 + H2O → 2H3PO4
b. (1) BaCO3 → BaO + CO2
(2) BaO + H2O → Ba(OH)2
\(2NaCl\underrightarrow{\text{điện phân nóng chảy}}2Na+Cl_2\uparrow\\ H_2+Cl_2\underrightarrow{\text{ánh sáng}}2HCl\\ Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\\ FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3\downarrow+3NaCl\)
\(FeS+2HCl\rightarrow2FeCl_2+H_2S\)
\(2H_2S+3O_2\rightarrow\left(t^o\right)2SO_2+2H_2O\)
\(2SO_2+O_2\rightarrow\left(t^o,V_2O_5\right)2SO_3\)
\(SO_3+H_2O\rightarrow H_2SO_4\)
\(Ba+H_2SO_4\left(l\right)\rightarrow BaSO_4+H_2\)
2Na + Cl2 \(\underrightarrow{t}\) 2NaCl
2NaCl + 2H2O \(\underrightarrow{đpmn}\) 2NaOH + Cl2 + H2
Cl2 + 2NaBr ➝ 2NaCl + Br2
Br2 + 2NaI ➝ 2NaBr + I2
3I2 + 2Al \(\underrightarrow{t}\) 2AlI3
\(Cl_2\) + 2Na => 2NaCl (Điều kiện: nhiệt độ)
2NaCl + \(2H_2O\) => \(Cl_2\) + \(H_2\) + NaOH (Điều kiên: điện phân dung dịch có màng ngăn
\(Cl_2\) + 2NaBr => 2NaCl + \(Br_2\)
\(Br_2\) +2NaI => 2NaBr + \(I_2\)
3\(I_2\) + 2Al => 2\(AlI_3\) (Điều kiện: nhiệt độ, xúc tác: \(H_2O\))