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Sagot :
Metallic sodium and chlorine gas are produced by the electrolysis of molten sodium chloride.
What is a word equation?
A word equation represents a chemical reaction using the names of the substances involved.
a) Word equation:
Sodium chloride + electrolysis → Sodium hydroxide + Hydrogen gas, Chlorine gas
b) The following reactions take place during the electrolysis of brine solution :
NaCl =[tex]Na^+ +Cl^-[/tex]
[tex]H_2O[/tex] =[tex]H^+ +OH^-[/tex]
Now there are two cations and two anions which get discharged in the following way :
At cathode : [tex]2H^+ +2e^-[/tex] = [tex]H_2[/tex]
At anode: [tex]2Cl^- - 2e-[/tex]=[tex]Cl_2[/tex]
The remaining ions
[tex]Na^+ +OH-[/tex] = NaOH
That's why we get [tex]H_2[/tex], [tex]Cl_2[/tex] and NaOH.
c) Balance each equation is:
2NaCl (l) → 2Na(s) + [tex]Cl_2[/tex](g)
Learn more about the word equation here:
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