Question

prepare a practical record of the class room preparation of chlorine gas​

Answer 1

Answer:

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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