How is chlorine prepared in the laboratory?
41.
How does it react with the following?
a) Iron
b) hot, conc. NaOH
e acidified FeSO4
d) Iodine
e) H,S
f) Na,s,o,
2019
3
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The laboratory method for the preparation of chlorine:
Manganese dioxide reacts with HCl.
MnO
2
+4HCl→MnCl
2
+2H
2
O+Cl
2
Reactions of chlorine with:
(a) Hot, conc. NaOH
Sodium chloride and sodium chlorate are obtained.
3Cl
2
+6NaOH→5NaCl+NaClO
3
+3H
2
O
(b) NH3 (Excess)
Ammonium chloride and nitrogen are formed.
3Cl
2
+8NH
3
(excess)→6NH
4
Cl+N
2
(c) Na
2
S
2
O
3
Na
2
S
2
O
3
+H
2
O+Cl
2
→Na
2
SO
4
+2HCl+S
Na
2
S
2
O
3
+5H
2
O+4Cl
2
→Na
2
SO
4
+8HCl+H
2
SO
4
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