Answer:
Water is a bad conductor of
electricity. Water is made a conductor either by addition of an acid or an
alkali. The water containing a small amount of an acid or alkali (about 15-20%)
is electrolysed in an electrolytic cell. The anode and cathode are separated by
asbestos diaphragm. The cathode used is usually of iron and anode usually of
nickel. The process is used at places where electric supply is cheap and easily
available.
Water containing
sulphuric acid
Ions present
are\[{{H}^{+}}\], \[O{{H}^{-}}\] and\[SO_{4}^{2-}\]. On passing electricity \[{{H}^{+}}\]ions
move towards cathode while \[OH\]and\[SO_{4}^{2-}\] ions move towards anode.
At
cathode : Hydrogen ions are discharged to give dihydrogen gas.
\[2{{H}^{+}}+2e\to 2H\to {{H}_{2}}\]
At anode:
\[O{{H}^{-}}\] ions are discharged to give oxygen gas.
\[O{{H}^{-}}\to OH+e\]
\[4OH\to 2{{H}_{2}}O+{{O}_{2}}\]
[\[SO_{4}^{2-}\]
ions are not discharged on anode as their discharge potential is higher than
that of \[O{{H}^{-}}\] ions.]
You need to login to perform this action.
You will be redirected in
3 sec