CBSE Class 10 Answered
when we do the electrolysis of NaCl then chlroine will formed into gaseous state and hence get removed from the solution the remain metal is Na(sodium) so my question is that sodium is a metal that burns in water so after this reaction why sodium is not burning even though it is in water?
Asked by krishdabhoya2003 | 19 Aug, 2018, 11:34: AM
Expert Answer
There are two way we performed electrolysis of NaCl
1) Molten NaCl or Concentrated NaCl solution:
In the electrolysis the electrolyte is obtained by heating the solid form of NaCl, on the heating state of NaCl is changes from solid to liquid which is our electrolyte.
Hence there are only two ions are present in the solution i.e., Na+ and Cl-.
Hence at cathode:
Na+ + e- → Na
At anode:
Cl- - e- → Cl
Cl + Cl → Cl2
2) Aqueous NaCl solution or brine solution:
The electrolyte is obtained by mixing water and NaCl salt. Hence there are four ions present i.e. Na+, Cl-, H+, OH-.
At cathode:
H+ + e- → H
H + H → H2
At anode:
Cl- - e- → Cl
Cl + Cl → Cl2
Other remaining ions Na+ and OH- are combined to formed NaOH.
Hence if an aqueous solution of NaCl is electrolyzed it will never be discharged sodium metal at cathode instead that hydrogen gas is discharged there.
Because Hydrogen is lower in the electrochemical series than sodium, hence it will discharge more easily at the cathode.
Answered by Ramandeep | 20 Aug, 2018, 12:55: PM
Application Videos
Concept Videos
-
Types of Chemical Reactions
Study the meaning of oxidation, reduction and Redox reaction in terms of h... -
Types of Chemical Reactions
Study the meaning of oxidation, reduction and Redox reaction in terms of h... -
Types of Chemical Reactions
Study the meaning of oxidation, reduction and Redox reaction in terms of h...
CBSE 10 - Chemistry
Asked by ten.foundation | 29 Aug, 2022, 07:53: PM
ANSWERED BY EXPERTCBSE 10 - Chemistry
Asked by bhuyanagas | 30 Nov, 2021, 09:46: PM
ANSWERED BY EXPERTCBSE 10 - Chemistry
Asked by s158410a.niraj007031 | 03 Nov, 2021, 05:04: PM
ANSWERED BY EXPERTCBSE 10 - Chemistry
Asked by shlok4559 | 01 Nov, 2021, 09:39: PM
ANSWERED BY EXPERTCBSE 10 - Chemistry
Asked by pardeep360sehlang | 06 Oct, 2021, 09:28: PM
ANSWERED BY EXPERTCBSE 10 - Chemistry
Asked by yogipharma11 | 22 Oct, 2020, 06:28: PM
ANSWERED BY EXPERTCBSE 10 - Chemistry
Asked by nehchalrs15 | 02 Oct, 2020, 10:14: AM
ANSWERED BY EXPERTCBSE 10 - Chemistry
Asked by nirupathak2004 | 21 May, 2020, 06:09: PM
ANSWERED BY EXPERTCBSE 10 - Chemistry
Asked by bhuvaneswari5781 | 18 May, 2020, 11:13: AM
ANSWERED BY EXPERTCBSE 10 - Chemistry
Asked by debjit_dm | 01 May, 2020, 04:41: PM
ANSWERED BY EXPERT
Get in Touch
